Solectria Renewables SGI 225 / SGI 266 / SGI 300 / SGI 500 Installation and Operation Manual

 SGI 225 SGI 250 SGI 266 SGI 300 SGI 500 INSTALLATION AND OPERATION MANUAL Revision C © 2011, Solectria Renewables LLC SGI Series Inverters IMPORTANT REGISTRATION AND WARRANTY INFORMATION For warranty to become active, this inverter must be registered. To activate warranty and register inverter, please visit the link below. www.solren.com/registration Installation and Operation Manual (Rev C) SGI Series Inverters IMPORTANT SAFETY INSTRUCTIONS
In this manual “inverter” or “inverters” refers to the inverter models: SGI 225, SGI 250, SGI 266, SGI 300 and SGI 500 unless one of the specific models is noted. This manual contains important instructions that shall be followed during installation and maintenance of the SGI inverter. To reduce the risk of electrical shock, and to ensure the safe installation and operation of the inverter, the following safety symbols are used to indicate dangerous conditions and important safety instructions: WARNING: This indicates a fact or feature very important for the safety of the user and/or which can cause serious hardware damage if not applied appropriately. Use extreme caution when performing this task. NOTE: This indicates a feature that is important either for optimal and efficient use or optimal system operation. EXAMPLE: This indicates an example. SAVE THESE INSTRUCTIONS Installation and Operation Manual (Rev C) SGI Series Inverters IMPORTANT SAFETY INSTRUCTIONS 
All electrical installations shall be performed in accordance with the local, American and Canadian electrical codes. 
The inverter contains no user serviceable parts. Please contact Solectria Renewables or a Solectria Renewables authorized system installer for maintenance. See Appendix C for Solectria Renewables contact information and authorized system installers. 
Before installing or using the inverter, please read all instructions and caution markings in this manual and on the inverter as well as the PV modules. 
Connection of the inverter to the electric utility grid must be completed after receiving prior approval from the utility company and must only be performed by qualified personnel. 
Completely cover the surface of all PV arrays with an opaque material before wiring them. PV arrays produce electrical energy when exposed to light and could create a hazardous condition. 
The inverter enclosure and disconnects must be locked (requiring a tool or key for access) for protection against risk of injury to persons. The enclosure includes a lockable handle and comes with a key. Keep the key in a safe location in case access to the cabinet is needed. A replacement for a lost key can be purchased from Solectria Renewables. SAVE THESE INSTRUCTIONS PRESCRIPTIONS DE SECURITE IMPORTANTES
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Tous les travaux d’installation électrique doivent être exécutés en conformité aux normes électriques locales ainsi qu’à la norme nationale américaine et canadienne. 
Le SGI ne contient aucune pièce requérant un entretient effectué par l‘utilisateur. Pour toute maintenance, veuillez consulter Solectria Renewables ou un installateur agrée par Solectria Renewables (les coordonnées de Solectria Renewables et des installateurs agrées sont indiquées sur le site web de Solectria Renewables: www.solren.com. 
Avant d’installer ou d’utiliser le SGI, veuillez lire toutes instructions et toutes les mises en garde présentes dans ce manuel, sur le SGI et sur les modules PV. 
Le raccordement du SGI au réseau électrique ne doit être effectuée qu’après avoir obtenu une entente d’interconnexion auprès de la compagnie locale de distribution électrique et uniquement par du personnel autorisé et qualifié. 
La surface de tous les capteurs PV doivent être recouverte entièrement d’un matériel opaque 
(noir) avant de procéder au câblage. Les capteurs PV exposés a la lumière produisent du courant électrique susceptible de créer une situation de risque. CONSERVEZ CES INSTRUCTIONS Installation and Operation Manual (Rev C) SGI Series Inverters Table of Contents 1.0 Introduction ...................................................................................................................................... 1 2.0 Site Preparation and Inverter Placement ......................................................................................... 4 2.1 Inverter Positioning ....................................................................................................................... 6 2.2 Leveling the Inverter ..................................................................................................................... 6 2.3 Mounting Details ........................................................................................................................... 7 2.4 DC and AC Wire Entry Points ........................................................................................................ 8 3.0 Installation ...................................................................................................................................... 10 3.1 Checking for Shipping Damage ................................................................................................... 10 3.2 Inverter Mounting ....................................................................................................................... 11 3.3 Removing Inverter from Pallet and Moving Inverter Into Place ................................................. 11 4.0 DC Connections from the PV Array and AC Connections to the Electrical Utility Grid ................... 17 4.1 Grounding Electrode Conductor (GEC) ....................................................................................... 17 4.2 Equipment Grounding Conductor (EGC) ..................................................................................... 18 4.3 DC Subcombiner Wiring .............................................................................................................. 19 4.4 DC Ground Fault Detection and Interruption ............................................................................. 22 4.5 AC Wiring .................................................................................................................................... 23 4.6 AC Ground Fault Detection ......................................................................................................... 25 4.7 Lightning and Surge Protection ................................................................................................... 25 4.8 Remote Shutdown Wiring ........................................................................................................... 25 4.9 SolrenView Monitoring ............................................................................................................... 27 4.10 SolrenView Air Monitoring .......................................................................................................... 27 5.0 Commissioning the Inverter PV System .......................................................................................... 28 5.1 Turning on the Inverter ............................................................................................................... 28 5.2 Operation .................................................................................................................................... 28 5.3 Turning off the Inverter .............................................................................................................. 28 6.0 LCD Display and LED Indicators ....................................................................................................... 29 6.1 LCD Display .................................................................................................................................. 29 6.2 Button Description ...................................................................................................................... 29 6.3 Screen Descriptions ..................................................................................................................... 30 6.4 LED Indicators ............................................................................................................................. 33 7.0 Troubleshooting and Inverter Messages ........................................................................................ 34 Installation and Operation Manual (Rev C) SGI Series Inverters 7.1 8.0 Inverter Messages ....................................................................................................................... 34 Product Warranty & RMA Policy ..................................................................................................... 36 8.1 Warranty Policy ........................................................................................................................... 36 8.2 Return Material Authorization Policy ......................................................................................... 40 9.0 Technical Data ................................................................................................................................. 41 9.1 Input DC (PV) Specifications ........................................................................................................ 42 9.2 Output AC Specifications ............................................................................................................ 43 9.3 Other Specifications .................................................................................................................... 44 9.4 Internal Circuit Diagram .............................................................................................................. 46 10.0 Appendices ...................................................................................................................................... 47 10.1 Appendix A – SGI 225, 250, SGI 266, SGI 300 and SGI 500 Data Sheet ....................................... 47 10.2 Appendix B – String Sizing Tool ................................................................................................... 47 10.3 Appendix C – Contact Information .............................................................................................. 47 10.4 Authorized Distributors ............................................................................................................... 47 10.5 Appendix D – UL1741 / IEEE 1547 / CSA22.2#107.1 Listing Letter ............................................. 48 Installation and Operation Manual (Rev C) SGI Series Inverters 1.0 Introduction The Smart Grid inverters (SGI) are commercial, three‐phase grid‐tied PV inverters designed to be interconnected to the electric utility grid. By following this manual the inverter can be installed and operated safely. This installation guide is used as reference for the commissioning and as a guideline on how to use the inverter most effectively. Feeding power into the grid involves conversion of the DC voltage from the PV array to grid compatible AC voltage by inverting DC to AC. This unit feeds power into a standard, three‐phase commercial, industrial, institutional or electrical utility facility’s electrical system which is connected to the electrical grid. If the PV system and inverter are providing the same amount of electrical power that the facility is using, then no power is taken from or fed into the utility grid. If the facility is using more power than the PV system is providing, then the utility grid provides the balance of power. If the facility is using less power than the PV system is generating, then the excess is fed into the utility grid. Be sure to follow local regulations regarding net metering and interconnection in your local area. Note that some utilities need to change their revenue kWh meter for proper net metering measurement and billing. Electrical
Grid
PV Array
SGI Series Inverter
Figure 1.1 – Grid‐Tied Inverter Application Installation and Operation Manual (Rev C) 1 SGI Series Inverters DC disconnect switch Warning label
Lift eyes LEDs LCD display and keypad Nameplate, specs and ETL, UL1741 / IEEE1547 / CSA certification labels Cooling air intake Left side of enclosure contains integrated inverter, filters and contactor Right side of enclosure contains isolation transformer and inductors Figure 1.2 – The SGI Inverter (Front) Installation and Operation Manual (Rev C) 2 SGI Series Inverters Exhaust air vents Figure 1.3 – The SGI Inverter (Rear) Installation and Operation Manual (Rev C) 3 SGI Series Inverters 2.0 Site Preparation and Inverter Placement The inverter is comprised of a rainproof industrial enclosure containing electrical and electronic components and AC and DC integrated disconnecting means. NOTE: If the inverter is mounted outside, ensure that the enclosure doors remain closed during the installation process in case of rain or snow. Leaving these doors open during installation will void the warranty. NOTE: If the inverter is to be stored outdoors before being installed and commissioned, care must be taken to avoid condensation inside the unit. Removing the protective shipping wrap and placing a small space heater inside the unit can help minimize the amount of condensation that can occur during onsite outdoor storage. Criteria for device mounting:  Because the power electronics are within the rainproof main enclosure, the inverter can be mounted outdoors.  The maximum life for the inverter can be achieved by mounting the unit in a clean, dry and cool location.  For optimal electrical system efficiency, use the shortest possible AC and DC cables and use the maximum allowable cable size.  Avoid installation in close proximity to people or animals, as there is an audible high‐
frequency switching noise.  Install the inverter in an accessible location following NEC codes for enclosure and disconnect door clearances and proximity to other equipment.  Although the inverter is designed to function at full power continuously in up to 50oC ambient temperatures, for optimal inverter life and performance, do not mount the inverter in direct sunlight, especially in hot climates. If the unit must be mounted in direct sunlight a metal sun‐shield is recommended. It is recommended that the inverter is mounted on the north side of buildings or on the north side of a ground mount PV array. Installation and Operation Manual (Rev C) 4 SGI Series Inverters CAUTION: Please follow these guidelines: 
Be sure to verify load capacity of floor, roof or concrete pad mounting area. Inverter Model Weight Fork Lift SGI 500 6980 lbs. 8000 lbs SGI 300, 266, 250 5650 lbs. 6000 lbs SGI 225 5170 lbs 6000 lbs 
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Table 2.1 – Weight and Required Fork Lift Capacity The ambient temperature must be between –40oC and +50oC for full power, continuous operation. The inverter will automatically reduce power or may shut down to protect itself if ambient air temperature at the intake rises above 50oC. The National Electrical Code (NEC) requires that the inverter be connected to a dedicated circuit and no other outlets or device may be connected to this circuit. See NEC Article 690. The NEC also imposes limitations on the size of the inverter and the manner in which it is connected to the utility grid. See NEC Article 690 for guidance within the US. The cooling air exhausts at the back of the unit. Nothing should block 6 inches clear space behind the enclosure. Air should be able to flow from bottom to top along the back of the inverter. It is also recommended to have 6 inches clearance on the left and right sides. A minimum distance of 12 inches (300mm) must be clear above the inverter for ventilation. If you are installing the inverter in a utility vault or electrical closet, the air circulation must be sufficient for heat dissipation. Provide external ventilation to maintain an ambient condition of less than 50oC. The ambient temperature should be kept as low as possible at all times for optimal inverter operation and life. Model SGI 500 SGI 300 SGI 266 SGI 250 SGI 225 Max. heat loss 55000 Btu/hr 32000 Btu/hr 28000 Btu/hr 26000 Btu/hr 24000 Btu/hr Table 2.2 – Indoor Cooling Requirements Installation and Operation Manual (Rev C) 5 SGI Series Inverters 2.1 Inverter Positioning Correct mounting position for the inverter is vertical with the mounting feet on the floor. This diagram shows the basic inverter footprint dimensions: Figure 2.1 – SGI Series Dimensions (Top View) 2.2 Leveling the Inverter The inverter must be mounted on a flat and level plane in order for proper operation of the doors and integral DC disconnect and AC breaker. To check if the inverter is properly leveled, the top of each pair of doors should be aligned with one another. If the top edges are not aligned, level the inverter by placing aluminum shims under the appropriate mounting foot prior to securing the inverter. Acceptable Door Alignment Incorrect Door Alignment Figure 2.2 – Leveling the Inverter for Proper Door Alignment NOTE: Failure to properly level the inverter may cause damage to the enclosure, resulting in water infiltration or degradation of the enclosure. NOTE: Failure to properly level the inverter may cause damage to the operating mechanisms of the integral DC disconnect and AC breaker. Installation and Operation Manual (Rev C) 6 SGI Series Inverters 2.3 Mounting Details Left
Right
The inverter includes mounting feet with 6 holes (1/2”, 12mm diameter) on a rectangular pattern for attaching the inverter. Note that the outer 4 mounting holes are 2” inside each corner of the main inverter enclosure. Front
Figure 2.3 – SGI Series Mounting Pattern (Top View) It is recommended to use six hot dip galvanized grade 5 or 8 steel bolts or stainless steel bolts for mounting the feet. The correct bolt size is 3/8” (10mm) diameter. Use a heavy lock washer and flat washer with each bolt. Alternatively, a “toe‐plate” can be used at the end of each 4x4” tube foot. After mounting is completed, remove shipping aids from front shrouds and inside unit. WARNING: Severe injury or death could occur if the inverter mounting fails and the unit tips over or falls on a person. NOTE: The weight of the inverter will exert an added load to floor, roof or pad where mounted. Be sure to verify proper load capacity of mounting surface. NOTE: If the roof/floor mounting only uses the inverter’s mounting feet, be sure you use all 6 available foot mount bolt positions. Installation and Operation Manual (Rev C) 7 SGI Series Inverters 2.4 DC and AC Wire Entry Points AC and DC wiring must enter through the provided conduit cutout in the bottom of the inverter enclosure or through the alternate conduit entries. Alternative locations are the left side for DC and back panel for AC. Alternate DC
Conduit Entries
AC and DC
Conduit Plate
Figure 2.4 – AC and DC Conduit Entry Points Installation and Operation Manual (Rev C) Alternate AC
Conduit Entry
8 SGI Series Inverters Fig 2.5 – Alternate DC Conduit Entry Locations Figure 2.6 – Alternate AC Conduit Entry Location Installation and Operation Manual (Rev C) 9 SGI Series Inverters 3.0 Installation WARNING: Before installing the inverter, read all instructions and caution markings in this manual and on the inverter as well as on the photovoltaic modules. WARNING: Electrical installation shall be performed in accordance with all local electrical codes and the National Electrical Code (NEC), Canadian Electrical Code for Canada (CEC), NFPA 70. WARNING: Connecting the inverter to the electric utility grid must only be completed after receiving prior approval from the utility company and installation performed only by qualified personnel/licensed electrician(s). 3.1 Checking for Shipping Damage The inverter is thoroughly checked and tested rigorously before it is shipped. Even though it is bolted onto a rugged, oversized pallet for delivery, the inverter can be damaged during shipping by poor handling, trucking or transfer station activity. Please inspect the inverter thoroughly after it is delivered. If any damage is seen please immediately notify the shipping company to make a claim. If there is any question about potential shipping damage, contact Solectria Renewables. Photos of the damage may be helpful in documenting potential shipping damage.  Do not accept the unit if it is visibly damaged or if you note visible damage when signing shipping company receipt.  Note damage on shipping papers with the truck driver! Report damage immediately to the shipping company.  Do not remove the unit from pallet/packaging if damage is evident.  If it is determined that the unit must be returned, a RMA number must be obtained from Solectria Renewables prior to shipping the unit back. Installation and Operation Manual (Rev C) 10 SGI Series Inverters 3.2 Inverter Mounting WARNING: The inverter may tip over if improperly moved, potentially causing damage to equipment, personal injury or death. ‐ Note the center of gravity to guide lifting methods. ‐ Do not tilt the pallet or inverter while moving it. ‐ Safety chains and straps must be used to prevent any possible tilting or shifting of the inverter in any direction while being lifted. WARNING: Do not install the inverter on or over combustible surfaces or materials. 3.3 Removing Inverter from Pallet and Moving Inverter Into Place It is recommended to keep the inverter secured to the pallet and moved as close as possible to the final location prior to removing the pallet. To remove the securing bolts use a 9/16” socket and/or wrench. Completely remove each nut and bolt from the pallet. The center of gravity of the inverter is well to the right of center and is marked with a label on the left door of the transformer enclosure (right half of the enclosure). Use an 8,000lb capable forklift for the SGI 500 or 6,000lb capable forklift for the SGI 225‐300 if lifting from the bottom. The forks should be set to an inside spacing so they fit just to the left of the inverter's 4” x 4" aluminum tube feet. Before lifting, make sure forks are against the left edges of both the right most foot and center foot and install safety chains (with failsafe hooks) to prevent inverter from sliding off forklift (see following diagrams). Installation and Operation Manual (Rev C) 11 SGI Series Inverters B
A
B
A
Figure 3.1 – Forklift Lifting Positions Use positions A when lifting or moving the inverter while attached to the pallet Use positions B when lifting or moving the inverter removed from the pallet Note that the lifting diagrams show the inverter being lifted while mounted on the shipping pallet. If the inverter is lifted without the shipping pallet, a properly rated safety strap must be placed over the top of the inverter firmly holding it down on the lifting devices forks. It is recommended to use two lifting straps, one holding the inverter to the left fork and another to the right fork. NOTE: Failure to follow these lifting guidelines may cause structural damage to the inverter and void the warranty. Alternatively, the inverter can be lifted using the lifting eyes on the top. If using this lifting method, lift with vertical chains and hooks connected to a proper lifting device. Do not lift with an “A” chain between the two eyes left‐to‐right as this will result in permanent damage to the inverter. At a minimum, use 3 “A” chain sets going front‐to‐rear with each side of the “A” having a chain length of 4 feet minimum. Each “A” chain must be tensioned equally. The recommended method is a 3 beam hoist with 6 equal‐length tensioned chains hanging down, one over each eye bolt. An A‐frame can then be used above the 3 beams. Never lift only by the outer 4 eyebolts as this will damage the inverter. Installation and Operation Manual (Rev C) 12 SGI Series Inverters Figure 3.2 – Preferred Straight‐Chain Lifting Method Installation and Operation Manual (Rev C) 13 SGI Series Inverters 4’ Minimum
Figure 3.3 – Minimum Requirements for Eyebolt Lifting Installation and Operation Manual (Rev C) 14 SGI Series Inverters 20’ Minimum
Figure 3.4 – Marginal Lifting Method Installation and Operation Manual (Rev C) 15 SGI Series Inverters Less than 20’ Figure 3.5 – Improper Lifting Method Installation and Operation Manual (Rev C) 16 SGI Series Inverters 4.0 DC Connections from the PV Array and AC Connections to the Electrical Utility Grid WARNING: All electrical installations shall be performed in accordance with all local electrical codes and the National Electrical Code, Canadian Electrical Code for Canada and NFPA 70. Only make AC connections directly to the AC breaker and DC connections to the DC sub combiner panel. 4.1 Grounding Electrode Conductor (GEC) As with all PV systems, a Grounding Electrode Conductor must be installed per NEC 690. This conductor should be sized according to NEC requirements. Both a DC and AC GEC may be required at the inverter in some instances. Two lug positions are provided on the ground bond plate for the AC and DC grounding electrode conductors. Figure 4.1 ‐ AC and DC GEC Lug Positions Cu or Al Conductors Max. 1 x 1/0AWG‐750kcmil 75C connections, 550 in‐lbs 1 wire per lug or Max. 2 x 1/0AWG‐300kcmil 75C connections, 550 in‐lbs 2 wires per lug WARNING: Make sure to establish a solid connection from the inverter to the system grounds before proceeding to connect any DC or AC power wires. Installation and Operation Manual (Rev C) 17 SGI Series Inverters 4.2 Equipment Grounding Conductor (EGC) The ground bond plate is also equipped with a number of provisions for equipment grounding conductors. In most instances, these will be used for the equipment grounds originating at the combiner boxes used to feed the subcombiner positions within the inverter. Figure 4.2 ‐ EGC Lug Positions Cu or Al Conductors Max. 28 x 14AWG‐1/0AWG 75C connections, 50 in‐lbs 1 wire per lug position Installation and Operation Manual (Rev C) 18 SGI Series Inverters 4.3 DC Subcombiner Wiring WARNING: The wiring connections of the inverter to the DC voltage from the PV strings and the AC voltage of the utility must be performed with the AC and DC disconnects off, building AC source circuit panel/breaker off and the PV module strings disconnected (or modules covered). WARNING: Before connecting the DC conductors of the PV array to the subcombiner, verify the polarity of the conductors. WARNING: Before connecting the DC conductors of the PV array to the subcombiner, verify that the DC voltage is less than 600V DC. The PV array open circuit voltage must be below 600V DC (Vpv < 600V DC) under all conditions per NEC 690. Please read the Technical Info section for details. Any DC voltage over 625V will damage the inverter and void the warranty. WARNING: Fuses in the inverter’s ungrounded, fused subcombiner must only be replaced with the same type and rating (600VDC) fuses as originally installed. The SGI series of inverters must be ordered with an integral fused subcombiner. Many fuse choices are available to meet any design constraint. For the 225‐400A Subcombiner, choose any combination of fuse values from 225A, 250A, 300A, 350A or 400A. For the 110‐200A Subcombiner, choose any combination of fuse values from 110A, 125A, 150A, 175A or 200A. For the 70‐100A Subcombiner, choose any combination of fuse values from 70A, 80A, 90A or 100A. Either copper or aluminum wire may be used for the DC (PV) positive and negative conductors, although due to terminal size restrictions, aluminum wire may not be an option for all cases. As with any aluminum wire exercise best industry practices to ensure a reliable connection; thoroughly clean the conductor just prior to making the electrical connection and use an oxide inhibitor to prevent the formation of aluminum oxide. Installation and Operation Manual (Rev C) 19 SGI Series Inverters The fused subcombiner plate is populated with a number of fuse holders in a variety of configurations to meet varied array designs. SGI 500 : 8 positions 225 – 400A 600VDC fuses SGI 225 ‐300: 6 positions 225 – 400A 600VDC fuses Cu or Al Conductors Max. 16 x 2AWG‐300kcmil 75C connections, 275 in‐lbs 1‐2 wires per fuse position SGI 500 : 16 positions 110 – 200A 600VDC fuses SGI 225 ‐300: 12 positions 110 – 200A 600VDC fuses Cu or Al Conductors Max. 16 x 2AWG‐300kcmil 75C connections, 375 in‐lbs 1 wire per fuse position SGI 500 : 32 positions 70 – 100A 600VDC fuses SGI 225‐300 : 24 positions 70 – 100A 600VDC fuses Cu or Al Conductors Max. 32 x 6AWG‐1/0AWG 75C connections, 100 in‐lbs 1 wire per fuse position Table 4.1 – DC Subcombiner Ungrounded, Fused Inputs NOTE: Not all of the fused positions will be used in all designs. In the case that not all of the positions will be used, the inverter will ship with spare fuses in the unused locations. The locations of the used and unused positions will be clearly labeled on the arc shield that covers the exposed terminals. The installer must follow the labeling for the used connections to ensure proper functionality of the inverter. Failure to follow the labeling may cause the inverter not to be able to sense the DC voltage, preventing the inverter from turning on. Installation and Operation Manual (Rev C) 20 SGI Series Inverters The grounded subcombiner plate is populated with a number of lugs of the appropriate size to match the wiring inputs of the fused subcombiner. SGI 500 : 8 positions 8 lugs SGI 225 ‐300: 6 positions 6 lugs Cu or Al Conductors Max. 16 x 2AWG‐300kcmil 75C connections, 550 in‐lbs 1‐2 wires per lug SGI 500 : 16 positions 8 lugs (two wires per lug) SGI 225 ‐300: 12 positions 6 lugs (two wires per lug) Cu or Al Conductors Max. 16 x 2AWG‐300kcmil 75C connections, 550 in‐lbs 2 wires per lug SGI 500 : 32 positions 16 lugs (double lugs) SGI 225‐300 : 24 positions 12 lugs (double lugs) Cu or Al Conductors Max. 32 x 6AWG‐1/0AWG 75C connections, 50 in‐lbs 1 wire per lug position Table 4.2 – DC Subcombiner Grounded, Unfused Inputs The grounded DC connections are bonded to the ground system within the inverter through the ground fault detection and interrupt circuit (GFDI). The PV grounded connections should not be bonded to the ground system at any other point. The PV ungrounded connections must never be bonded to the ground system at any time. WARNING: The PV grounded connections should not be bonded to the ground system at any point outside of the inverter. This bond is made in the GFDI circuit that is integral to the inverter. Installation and Operation Manual (Rev C) 21 SGI Series Inverters 4.4 DC Ground Fault Detection and Interruption Every SGI inverter is equipped with an automatic DC Ground Fault Detection and Interruption (GFDI) circuit. When a single ground fault exceeding the pickup value is present in the PV array or in the DC wiring to the inverter, the DC GDFI breaker will trip and a ground fault will be signaled by means of a yellow LED and a message on the front LCD display. Breaker TRIPPED DC GROUND FAULT INDICATED Breaker ON NO GROUND FAULT DETECTED Figure 4.3 – Operating Positions of GFDI Breaker SGI 225 ‐ 250 SGI 266 ‐ 500 DC Ground Fault Current Pickup 4 A 5 A Maximum Trip Time 1 s 1 s Table 4.3 – DC GFDI Specifications WARNING: If the GFDI breaker trips upon connection of one or more combined strings you must locate and eliminate the ground fault in the array before proceeding. The DC ground fault is eliminated when the GFDI breaker can be engaged back into its lever‐up position and remain in that position. Failure to obey these instructions will cause the grounded conductor to rise to potentially unsafe voltage levels (unsafe for a human to touch; the inverter can withstand DC ground faults of 2400A). WARNING: Even when the DC disconnect is in the off position, the ungrounded DC conductor leading up to the DC disconnect will remain live on the PV side as long as the PV modules are in daylight. The inverter side of the DC disconnect will also remain live after the disconnect has been shut off until 60 seconds after the LEDs turn off, as DC bus capacitors in the inverter discharge. Installation and Operation Manual (Rev C) 22 SGI Series Inverters 4.5 AC Wiring The SGI series of inverters must be connected to the grid with three phase conductors and the appropriate AC grounding conductors. No neutral conductor is required. The SGI series of inverters measure phase to phase voltages and do not detect phase to neutral voltages, as described in IEEE 1547‐2003 §4.2.3. Each SGI inverter includes an integrated AC breaker that serves as the connection point for the AC wiring to the building service or grid connection. The breaker will have different ratings depending on the inverter model. Model Ampere Rating Interrupt Rating 100% Rated SGI 225 400A 25 kAIC No SGI 250 400A 35 kAIC No SGI 266 400A 35 kAIC No SGI 300 400A 35 kAIC Yes SGI 500 800A 65 kAIC No Table 4.4 – Factory Included AC Breaker Minimum Specifications If the AC building connection is designed with an overcurrent protection device (OCPD), it must be dedicated to the PV system and must be adequately rated for the current delivered by the inverter as required by NEC 690. See NEC 690, NEC 705 and NEC 240 for guidance on sizing the building OCPD. The table below summarizes the inverter’s required ampere rating for nominal 125% rated OCPDs; these ratings may change depending on the interconnect design and whether or not 100% rated OCPDs are used. Model Ampere Rating SGI 225 350A SGI 250 400A SGI 266 400A SGI 300 450A SGI 500 800A Table 4.5 – Nominal 125% Rated Building Backfeed OCPD Ampere Ratings The grid impedance value at the connection point should be as low as possible to avoid an increase of the AC voltage to non‐permissible values while the inverter feeds power to the grid. Designing for less than 1% AC phase‐to‐phase voltage rise is recommended. Minimizing wiring impedance also results in higher system efficiency. 1% Voltage Drop Single Min. AWG for Min. AWG for Min. AWG for Model Conductor Resistance 200ft 400ft 800ft SGI 250‐480VAC 8.0 mOhm 350 kcmil 2x350 kcmil 4x350 kcmil SGI 266‐480VAC 7.5 mOhm 350 kcmil 2x350 kcmil 4x350 kcmil SGI 300‐480VAC 6.7 mOhm 400 kcmil 2x400 kcmil 4x400 kcmil SGI 500‐480VAC 4.0 mOhm 2x350 kcmil 3x500 kcmil 4x750 kcmil Example: Copper Wire Size for 1% AC Voltage Rise Installation and Operation Manual (Rev C) 23 SGI Series Inverters Connect the building’s three‐phase conductors into the bottom of the integrated AC breaker as shown below. Phase A should connect to the leftmost position of the breaker, phase B to the middle position and phase C to the rightmost position. A
B
C
Figure 4.4 – AC Connection Points
Either copper or aluminum wire may be used for the AC phase conductors, although due to terminal size restrictions, aluminum wire may not be an option for all cases. As with any aluminum wire exercise best industry practices to ensure a reliable connection; thoroughly clean the conductor just prior to making the electrical connection and use an oxide inhibitor to prevent the formation of aluminum oxide. Use minimum 90oC (194oF) rated wire to connect to the inverter’s integrated three‐phase AC breaker. See NEC 310 regarding temperature ratings of wire. Follow local code to determine minimum wire gauge and temperature rating of the wires. Voltage drop and other considerations may dictate that larger wire sizes be used. Model SGI 225 SGI 250 SGI 266 SGI 300 SGI 500 Maximum Number of Terminals per Phase 2 2 2 2 3 Minimum Wire Size 3/0 AWG 3/0 AWG 3/0 AWG 3/0 AWG 2/0 AWG Maximum Wire Size 500 kcmil 500 kcmil 500 kcmil 500 kcmil 400 kcmil Terminal Torque 275 in‐lbs 275 in‐lbs 275 in‐lbs 275 in‐lbs 375 in‐lbs Table 4.6 – Factory Included AC Breaker Wire Size Limits The SGI series of inverters require a clockwise phase sequence for proper operation. If a phase sequence error is displayed on the screen during commissioning of the inverter, simply swap any two phases to correct the phase sequence. Installation and Operation Manual (Rev C) 24 SGI Series Inverters 4.6 AC Ground Fault Detection The SGI series of inverter are not equipped with an AC Ground Fault detection circuit. Where required by local electrical code, the inverter AC output needs to be connected to the supply side of the installation’s AC ground fault protection. 4.7 Lightning and Surge Protection The SGI series is designed with certain protections against surges in voltage including certification to ANSI/IEEE 62.41/62.42. However, added protection and solid grounding provisions are important for best protection against utility surges and surges created by indirect lightning strikes. The installation of a UL listed lightning arrester of the correct specification is recommended on both the DC and AC inputs of the inverter. This should be installed and wired using the manufacturer's installation instructions. This device gives important added protection from indirect lightning strikes and the resulting voltage surges that provide protection beyond the inverter's IEEE 1547 requirements. The best protection against damage from lightning and other voltage surge sources is proper grounding of the system. When required by local codes, it is recommended to establish a grounding electrode system specifically for the PV array, located as close as practical to the array. It is also recommended to have the lightning protection system of the building checked and upgraded if needed before the PV system is installed. These added protections are especially important for areas prone to thunder storms and possible nearby lightning strikes. Although these added precautions will not guarantee that there will be no damage from lightning, they can help prevent or limit potential damage. 4.8 Remote Shutdown Wiring The SGI series of inverters feature a remote shutdown input to allow for advanced remote command and control systems. The input required is an isolated 24VDC signal that is wired to the terminal blocks on the back panel of the inverter by the installer. Once the signal is activated, the inverter will slowly ramp down power and then disconnect from the grid. The inverter will not reconnect until the signal is removed. The remote shutdown feature will not result in an instantaneous shutdown of the inverter. Maximum Nominal Minimum Maximum Minimum Shutdown Input Input Input Current Terminal Terminal Ramp Time Voltage Voltage Voltage Capability Wire Size Torque 4 seconds 24VDC 21.6VDC 26.4VDC 100mADC 26 – 14 AWG 4 in‐lbs Table 4.7 – Remote Shutdown Specifications Begin by locating a set of terminal blocks that are identified as block 2 on the back panel of the inverter (refer to the diagram on the following page). Wire the positive conductor to the left
Installation and Operation Manual (Rev C) 25 SGI Series Inverters bottommost position on terminal block 18. Wire the return conductor to the left bottommost position on terminal block 19.
Block 2 Numbered 1‐19 Block 1 Numbered 1‐8 Figure 4.5 – Terminal Block Locations a
b
1
2
3
4
5
6
7
8
9
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a (bottom) Remote shutdown in
Remote shutdown return
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Figure 4.6 – Remote Shutdown Wiring Locations on Terminal Blocks 18 and 19 Installation and Operation Manual (Rev C) 26 SGI Series Inverters 4.9 SolrenView Monitoring SolrenView is a state of the art web based inverter monitoring system. The SGI series of inverters are equipped with SolrenView monitoring hardware as part of the display module. To activate the hardware, SolrenView monitoring services must be purchased from Solectria Renewables. An Ethernet cable is then connected to a router with broadband internet on the premises for IP address assignment. Connect the cat5 cable to the RJ45 jack on the lower right side of the SolrenView module Figure 4.7 – Connection of Optional SolrenView Monitoring System
For multiple inverters at one location it is necessary to connect an Ethernet cable to each inverter then to a router or switch for connection to the customer’s broadband internet service. To enable the SolrenView monitoring follow these steps using the display panel. 1. Press
to enter the display set mode
2. Press
to MONITOR
3. Press
to enter monitor set mode
4. Press
to SRV Mode
5. Press
to activate the change mode
6. Press
to select Yes
7. Press
to confirm
4.10 SolrenView Air Monitoring If you have purchased the 3G cellular SolrenView Air monitoring option, all of the hardware will be installed in the inverter and configured at the factory. The inverter will begin to report to the SolrenView server as soon as the inverter is commissioned with AC and DC power and a cellular signal is present. No additional installation or configuration steps are necessary. Installation and Operation Manual (Rev C) 27 SGI Series Inverters 5.0 Commissioning the Inverter PV System At this point the inverter should be mounted, all connections are made and you are ready to power it up. NOTE: Make sure all tools, parts, etc. are removed from the vicinity of the inverter before turning on. WARNING: Make a final check of all AC and DC wiring to the inverter and in the system before turning on. NOTE: With the PV modules connected and inverter disconnects still off, perform a final check of the PV voltage and polarity once more using a digital volt meter and probing the positive (+) and negative (‐) PV connections. Verify clockwise AC phase rotation for L1, L2, L3 using a phase rotation meter. 5.1 
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Turning on the Inverter Turn on the dedicated three‐phase circuit breaker or disconnect at the building service. Turn on the inverter’s DC disconnect using the handle on the front door. Turn on the inverter’s three‐phase AC breaker using the handle on the front door. Watch the LED indicators for initialization (green and red LEDs on), then a slow blinking green LED followed by a faster blinking green LED. Watch the LCD display for prompts and system status. Listen for contactor closing (inverter on‐line). Listen for slight 60 Hz hum (transformer on‐line). Following the blinking green LED and high frequency switching sound you should see a solid green LED. This confirms that the inverter is operating normally. The LCD display will show the AC Power (PAC), Energy (EAC), current and voltage as well as DC voltage. 5.2 Operation The control electronics will be active as soon as the DC voltage reaches 300VDC. The inverter will go on‐line with the utility three‐phase grid when the DC voltage first exceeds 390VDC (strike voltage). Next, the inverter will load the array, bringing the DC voltage down from 390VDC to not less than 300VDC, unless the low voltage option has been selected, in which case the strike voltage will be 370VDC and the minimum MPPT voltage will be 285VDC. Once there is enough PV power to back feed three‐phase AC power, power switching will automatically feed power to the grid. 5.3 
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Turning off the Inverter If possible, use the keypad to temporarily disable the power output. Turn off the inverter’s DC disconnect using the handle on the front door. Turn off the inverter’s three‐phase AC breaker using the handle on the front door. Wait at least one minute for the capacitor bank to discharge. Installation and Operation Manual (Rev C) 28 SGI Series Inverters 6.0 LCD Display and LED Indicators The inverter operates automatically without the need for user interaction. The LCD display and Led indicators on the front door of the inverter provide valuable inverter operating information. 6.1 LCD Display 6.2 Button Description Figure 6.1 – LCD Display To move up a level from the current menu To scroll up or down within the individual menu items To enter into selected menu Installation and Operation Manual (Rev C) 29 SGI Series Inverters 6.3 Screen Descriptions Main Screen (Default) Eac: XXXX kWh Pac: XX W Press or or to move from the main / default screen into the Start Menu. To enter into a selected menu item, press the key. Start Menu 1.
2.
3.
4.
5.
6.
Measurements Set Inverter Inverter Events Monitor RG Meter (if installed) Info Measurements Menu This displays the data retrieved from the inverter. Use the buttons to scroll up and down through the list. Pressing will take the screen back to the start menu. AC Energy Cumulative AC Energy (kWh) AC Power AC Power output (W) AC Voltage AC Voltage, Three‐phase (V) AC Freq. AC Frequency (Hz) AC Current (average) AC Current, Three‐phase average (A) DC Voltage DC Voltage (V) Apparent AC Power output (VA) Apparent Power Reactive Power Reactive AC Power output (VAr) Reactive Avail. Available Reactive AC Power output (VAr) React. Energy (+) Cumulative reactive energy generated (kVArh) React. Energy (‐) Cumulative reactive energy received (kVArh) Heat Sink Heat Sink Temperatures ( C) #1‐3 DC Current #1‐2 DC Current(A) #1‐ 2 (Only available with SolZone) DC Current #3‐4 DC Current(A) #3‐4 (Only available with SolZone) DC Current #5‐6 DC Current(A) #5‐6 (Only available with SolZone) DC Current #7‐8 DC Current(A) #7‐8 (Only available with SolZone) Note: data will only be available when inverter is awake and communicating.
Installation and Operation Manual (Rev C) 30 SGI Series Inverters Set Inverter Menu This displays inverter parameters, some of which may be modified with the keypad. Use the buttons to scroll up and down through the list. Pressing will take the screen back to the start menu. 1. Power Disable Temporarily disables the AC output of the inverter 2. Inverter ID Serial port address/ID of the inverter 3. Baud Rate Serial port baud rate (19200 or 9600) 4. Vac Very High AC Voltage Critical High 5. Vac High AC Voltage High 6. Vac Low AC Voltage Low 7. Vac Very Low AC Voltage Critical Low AC Frequency Low 8. Fac Low 9. Fac Very Low AC Frequency Critical Low 10. Fac High AC Frequency High (Not adjustable) 11. Power Level Inverter AC power output level 12. VAC Inverter VAC 13. Transformer Transformer model Limit AC Power (%) 14. Limit Power 15. UL Reconnect Wait time in minutes/seconds 16. Password 4‐digit pin code to set limits Note: data is only available when inverter is operating. Inverter Events Menu This displays inverter errors / event history. Timestamps are formatted as MM/DD/YY. 1. Err Counts Displays cumulative counters for each supported event / error, with the highest error count shown first. 2. Err Log Displays events (change of state) with the earliest event shown first. 3. Clear Clear History Options: Err Counts This clears the Err Counts menu. This clears Err Log menu. Err Log All This clears both error menus. List of Logged Events  Fan Life Reached  MOV Fault  AC Volt High  AC Volt Low  AC Freq High  DC GND FAULT  Min Vmpp Reached  AC Contact Open  CT Failure 
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AC Islanding Open Phase AC Freq Low NTC Failure IGBT Overtemp Desat Error Power Derated DC Volt High MAG Failure Installation and Operation Manual (Rev C) 
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Vsense Err Contactor Fail PS Fail PS Wake Fail PS Fail (Slave) Lost Freq Lock VDC Ctrl. Fail DMGI Overtemp
31 SGI Series Inverters Monitor Menu Displays monitor settings that may be modified with the keypad. 1. LAN Local Area Network configuration, applicable only for SolrenView monitoring a. DHCP Mode See SolrenView manual on DHCP b. Static/Fallback IP If DHCP is turned on, this is then used as the fallback IP IP address of LAN’s default gateway 2. Gateway IP 3. Netmask Subnet mask Manual time set. This may be overwritten by scheduled NIST updates. 4. Date/Time 5. Reboot Reboots the monitor 6. Remote SRV This starts the transmit process necessary for SolrenView monitoring. 7. Reset SRV Note: Enabling this option when SolrenView service has not been purchased will result in unnecessary wear on the storage memory. Settings are cleared to factory defaults. Caution: This will also clear Revenue‐grade KYZ counters.
Installation and Operation Manual (Rev C) 32 SGI Series Inverters 6.4 LED Indicators The LED indicators mounted on the front left of the inverter enclosure just above the LCD screen give the installer and user a quick look at what state the inverter is in and if it is operating normally. GREEN – POWER, the unit is powered up and / or feeding power to the grid RED – ERROR or FAULT, the inverter is not providing power due to an error or fault YELLOW – RED together indicate that a ground fault has been detected and it must be located and repaired before the inverter will function. Check GFDI breaker if YELLOW LED remains solid. Figure 6.2 – LED Indicators GREEN YELLOW RED GFDI Breaker Tripped DC ground fault is present in the PV array. Locate and correct the ground fault and then reset the GFDI breaker. For other LED indications please contact Solectria Renewables Customer Support. Installation and Operation Manual (Rev C) 33 SGI Series Inverters 7.0 Troubleshooting and Inverter Messages Although the inverter is designed for many years of power production there may be instances where messages may be displayed on the LCD screen. For ease of diagnostics most messages are displayed as an error message. 7.1 Inverter Messages Pac: XXXX W Power Derating Pac: XXXX W MOV Fault The inverter is in derating mode. Can be caused by high input power, high temperature, AC line impedance. Check string sizing, ambient temp, fans operating, vents are clear, AC wire sizing A high voltage transient has occurred from the AC grid voltage. Usually from lightning. The inverter will need to be inspected and serviced by an authorized service provider. The AC grid voltage is exceeding the high limit. Measure the actual VAC compared to the LCD display VAC. If VAC is greater than acceptable limits inverter will restart when normal. The AC grid voltage is less than the low limit. Measure the actual VAC compared to the LCD display VAC. If VAC is less than acceptable limits inverter will restart when normal. The AC grid frequency is exceeding the high limit. If possible measure the frequency or contact local utility provider. The AC grid voltage is less than the low limit. If possible measure the frequency or contact local utility provider. The AC contactor or sensing circuit has failed Turn off the inverter and contact Solectria Renewables. The inverter may need to be serviced by an authorized service provider. An internal failure has occurred in one or more of the cores Turn the DC and AC off, restart the inverter. The inverter may need to be inspected and serviced by an authorized service provider. The AC contactor is open when it is being commanded to be closed Turn off the inverter and contact Solectria Renewables. The inverter may need to be serviced by an authorized service provider. The internal temperature sensor has failed. Turn the DC and AC off, restart the inverter. The inverter may need to be inspected and serviced by an authorized service provider. The internal temperature is exceeding operational limits Turn the DC and AC off, let the inverter cool to ambient temperature and restart the inverter. Internal component sensing fault
Turn the DC and AC off, restart the inverter. The inverter may need to be inspected and serviced by an authorized service provider. Pac: XXXX W AC Voltage High Pac: XXXX W AC Voltage Low Pac: XXXX W AC Freq High Pac: XXXX W AC Freq Low Contactor Fail 978‐683‐9700 CT Failure 978‐683‐9700 Thermal disc. 978‐683‐9700 NTC Failure 978‐683‐9700 IGBT Overtemp 978‐683‐9700 Desat Error 978‐683‐9700 DC GND Fault Check DC Wiring The solar array or wiring has a fault to the Verify + and – VDC to ground, repair fault and ground circuit reset the GFDI circuit breaker Installation and Operation Manual (Rev C) 34 SGI Series Inverters VAC Low Reconnecting Pac: XXXX W Waiting for grid Reverse phasing & restart PVI! Pac: XXXX W Min Vmpp reached AC Contact Open 978‐683‐9700 The inverter had a “UL event” and is in the 5 minute wait period Wait for the inverter to restart Grid voltage may not be present Check for grid voltage The VAC grid connection phasing does Change the phase wire positions at the not match the inverter inverter connection on the grid side The power point tracking has been reached The inverter will hold the Vmpp at this level until it increases. The AC contactor is open when it is being commanded to be closed Turn off the inverter and contact Solectria Renewables. The inverter may need to be serviced by an authorized service provider. An internal failure of the voltage sensing circuit has occurred Turn off the inverter and contact Solectria Renewables. The inverter may need to be serviced by an authorized service provider. Vsense Err 978‐683‐9700 Open Phase 978‐683‐9700 MAG Failure 978‐683‐9700 Pac: XXXX W PS Fail Pac: XXXX W PS Fail (Slave) Pac: XXXX W PS Wake Fail One of the AC phases is not present at Verify that there is AC voltage on all the inverter phases at the inverter and all fuses are intact. Turn off the inverter and contact Solectria An internal failure of one of the Renewables. The inverter may need to be magnetic components serviced by an authorized service provider. An internal failure of the master power stage Turn off the inverter and contact Solectria Renewables. The inverter may need to be serviced by an authorized service provider. An internal failure of one of the slave power stages Turn off the inverter and contact Solectria Renewables. The inverter may need to be serviced by an authorized service provider. One of the internal power stages did not initialize properly Turn off the inverter and contact Solectria Renewables. The inverter may need to be serviced by an authorized service provider. An internal failure of the voltage sensing circuit Turn off the inverter and contact Solectria Renewables. The inverter may need to be serviced by an authorized service provider. The DC voltage is outside of the regulation specifications Turn off the inverter and contact Solectria Renewables. The inverter may need to be serviced by an authorized service provider. One of the internal power stages has exceeded its temperature limit Turn off the inverter and contact Solectria Renewables. The inverter may need to be serviced by an authorized service provider. Pac: XXXX W Lost Freq Lock Pac: XXXX W VDC Ctrl Fail Pac: XXXX W DMGI Overtemp Installation and Operation Manual (Rev C) 35 SGI Series Inverters 8.0 Product Warranty & RMA Policy 8.1 Warranty Policy Solectria Renewables Warranty Coverage: Solectria Renewables Limited Warranties are provided by Solectria Renewables, LLC. ("Solectria Renewables") and cover defects in workmanship and materials. Duration of a Solectria Renewables Warranty Period: The standard warranty period is 60 months from the date of shipment of the inverter to the Purchaser or 64 months after the delivery date from Solectria Renewables to distributor or dealer/installer, whichever is shorter. Warranty extensions are optional and purchased either at the time of the order or prior to the original warranty expiration. Please review the purchase documents to determine if any extended warranty has been purchased. The maximum warranty period is 20 years from date determined above. If you have purchased a 15 or 20 year extended warranty for a Solectria Renewables inverter, you must perform annual preventative maintenance in order for the warranty to apply. Preventative maintenance can be performed by either Solectria Renewables technicians or by a qualified installer or contractor. Please contact your Solectria Renewables technical support representative for further instructions on annual preventative maintenance. If Solectria Renewables repairs or replaces a product, its warranty continues for the remaining portion of the original Warranty Period, or extension. If the original warranty or extension has expired 90 days from the date of the repair to the product, whichever is greater. All warranties are null and void if full payment for products and associated shipping are not received in full and in a timely manner by Solectria Renewables. Please contact Solectria Renewables Customer Service for further details on other products. Warranty service provided by Solectria Renewables: Solectria Renewables will, at its option, repair or replace the defective product free of charge, provided that you notify Solectria Renewables of the product defect within the Warranty Period for your product, and provided that Solectria Renewables, through inspection, establishes the existence of such a defect and that it is covered by the Limited Warranty. Solectria Renewables will, at its option, use new and/or reconditioned parts in performing warranty repair and in any replacement products. Solectria Renewables reserves the right to use parts or products of original or improved design in the repair or replacement. All replaced products and all parts removed from repaired products become the property of Solectria Renewables. Installation and Operation Manual (Rev C) 36 SGI Series Inverters For Inverters located in Continental North America: Solectria Renewables will attempt to repair the unit within 4 working days from the first reported failure of the product. Working days do not include weekends and nationally recognized holidays. (There is no reimbursement for lost energy production.) Solectria Renewables covers both parts and labor necessary to repair the product, and parts shipments to and from customer via a Solectria Renewables‐selected non‐expedited surface freight within North America. Inverters located outside Continental North America: Other countries shipping charges are one way FROM the installation site location via non‐
expedited freight by Solectria Renewables carrier. The customer, end user or installer is required to pay TO shipping fees via their own carrier of choice. Shipping fees do not include duties, insurance, taxes or other Governmental charges. Obtaining Service: If your product requires troubleshooting or warranty service, contact your distributor or dealer/installer. If you are unable to contact your distributor or dealer/installer, or the distributor or dealer/installer is unable to provide service, contact Solectria Renewables directly at the number listed on the website in the customer service section for your product. At Solectria Renewables option may send employees or authorized service personnel to inspect, repair, and verify the equipment at the installation site. Any direct returns may be performed according to the Solectria Renewables Return Material Authorization Policy. In any warranty claim, dated proof of purchase must accompany the product and the product must not have been disassembled or modified without prior written authorization by Solectria Renewables. Proof of purchase may be in any one of the following forms: ‐ The dated purchase receipt from the original purchase of the product at point of sale to the end user, or ‐ The dated distributor or dealer/installer invoice or purchase receipt showing original equipment manufacturer (OEM) status, or ‐ The dated invoice or purchase receipt showing the product exchanged under warranty. Solectria Renewables normal office hours are Monday‐Friday, 8:30am‐5:30pm EST. After hours technical assistance is available. Once a problem is identified, necessary replacement component(s) will be typically dispatched within 48 hours to the jobsite or the designated service personnel's address or will be brought to the site by Solectria Renewables’ personnel. What does the Solectria Renewables warranty not cover? Solectria Renewables Limited Warranties do not cover normal wear and tear of the product or costs related to the removal, installation, or troubleshooting of the customer's electrical Installation and Operation Manual (Rev C) 37 SGI Series Inverters systems. These warranties do not apply to and Solectria Renewables will not be responsible for any defect in or damage to: a) The product, if it has been misused, neglected, improperly installed, physically damaged or altered, either internally or externally, or damaged from improper use or use in an unsuitable environment; b) The product, if it has been subjected to fire, water, generalized corrosion, biological infestations, acts of God or input voltage that creates operating conditions beyond the maximum or minimum limits listed in the Solectria Renewables product specifications including high input voltage from generators and lightning strikes; c) The product, if repairs have been performed to it other than by Solectria Renewables or authorized, trained service personnel; d) The product, if it is used as a component part of a product expressly warranted by another manufacturer; e) The product, if its original identification (trademark, serial number) markings have been defaced, altered, or removed; f) The product, if it has been damaged in shipping (unless approved in writing by Solectria Renewables); g) Any installation and operation beyond the scope covered by relevant safety regulations (UL1741, NEC, Canadian standards, etc.); h) Any third party accessories installed in or on the product. i) Loss of electricity generation, payment for utility bills, or any other costs related to the inverter after installation. Extended warranties covering Solectria Renewables inverters do not cover external data monitoring hardware. DISCLAIMER SOLECTRIA RENEWABLES LIMITED WARRANTIES ARE THE SOLE AND EXCLUSIVE WARRANTY PROVIDED BY SOLECTRIA RENEWABLES IN CONNECTION WITH YOUR SOLECTRIA RENEWABLES PRODUCT AND ARE, WHERE PERMITTED BY LAW, IN LIEU OF ALL OTHER WARRANTIES, CONDITIONS, GUARANTEES, REPRESENTATIONS, OBLIGATIONS AND LIABILITIES, EXPRESS OR IMPLIED, STATUTORY OR OTHERWISE IN CONNECTION WITH THE PRODUCT, HOWEVER ARISING (WHETHER BY CONTRACT, TORT, NEGLIGENCE, PRINCIPLES OF MANUFACTURER'S LIABILITY, OPERATION OF LAW, CONDUCT, STATEMENT OR OTHERWISE), INCLUDING WITHOUT RESTRICTION ANY IMPLIED WARRANTY OR CONDITION OF QUALITY, DISTRIBUTOR OR DEALER/INSTALLER ABILITY OR FITNESS FOR A PARTICULAR PURPOSE. ANY IMPLIED WARRANTY OF DISTRIBUTOR OR DEALER/INSTALLER ABILITY OR FITNESS FOR A PARTICULAR PURPOSE TO THE EXTENT REQUIRED UNDER APPLICABLE LAW TO APPLY TO THE Installation and Operation Manual (Rev C) 38 SGI Series Inverters PRODUCT SHALL BE LIMITED IN DURATION TO THE PERIOD STIPULATED UNDER THIS LIMITED WARRANTY. IN NO EVENT WILL SOLECTRIA RENEWABLES, LLC, INCLUDING ITS SUPPLIERS, MANUFACTURERS, VENDORS, SUBCONTRACTORS, DISTRIBUTORS, DEALERS AND ANY OTHER AFFILIATES BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES, LOSSES, COSTS OR EXPENSES HOWEVER ARISING WHETHER IN CONTRACT OR TORT INCLUDING WITHOUT RESTRICTION ANY ECONOMIC LOSSES OF ANY KIND, ANY LOSS OR DAMAGE TO PROPERTY, ANY PERSONAL INJURY, ANY DAMAGE OR INJURY ARISING FROM OR AS A RESULT OF ANY USE, MISUSE OR ABUSE, OR THE (IN‐) CORRECT INSTALLATION, INTEGRATION OR OPERATION OF THE PRODUCT. Solectria Renewables neither assumes nor authorizes any other person to assume for it any other liability in connection with the repair or replacement or the Product. Exclusions of the Policy: If your product is a consumer product, federal law does not allow an exclusion of implied warranties. To the extent you are entitled to implied warranties under federal law, to the extent permitted by applicable law they are limited to the duration of this Limited Warranty. Some states and provinces do not allow limitations or exclusions on implied warranties or on the duration of an implied warranty or on the limitation or exclusion of incidental or consequential damages, so the above limitation(s) or exclusion(s) may not apply to you. This Limited Warranty gives you specific legal rights. You may have other rights, which may vary from state to state or province to province. WITHOUT LIMITING THE GENERALITY OF THE FOREGOING, UNLESS SPECIFICALLY AGREED TO BY IT IN WRITING, SOLECTRIA RENEWABLES (a) MAKES NO WARRANTY AS TO THE ACCURACY, SUFFICIENCY OR SUITABILITY OF ANY TECHNICAL OR OTHER INFORMATION PROVIDED IN MANUALS OR OTHER DOCUMENTATION PROVIDED BY IT IN CONNECTION WITH THE PRODUCT; AND (b) ASSUMES NO RESPONSIBILITY OR LIABILITY FOR LOSSES, DAMAGES, COSTS OR EXPENSES, WHETHER SPECIAL, DIRECT, INDIRECT, CONSEQUENTIAL OR INCIDENTAL, WHICH MIGHT ARISE OUT OF THE USE OF SUCH INFORMATION. THE USE OF ANY SUCH INFORMATION WILL BE ENTIRELY AT THE USER'S RISK. WARNING: LIMITATIONS ON USE Please refer to your product user manual for limitations on uses of the product. Specifically, please note that Solectria Renewables products are not intended for use in connection with life support systems and Solectria Renewables makes no warranty or representation in connection with any use of the product for such purposes. Please review our Return Merchandise Authorization Policy for returning product to Solectria Renewables. Installation and Operation Manual (Rev C) 39 SGI Series Inverters 8.2 Return Material Authorization Policy Obtaining a required, Return Material Authorization: Before returning a product or parts directly to Solectria Renewables you must obtain a Return Material Authorization (RMA) number and the correct factory "Ship To" address. Products must also be shipped prepaid. Product shipments will be refused and returned at your expense if they are unauthorized returned without an RMA number clearly marked on the outside of the shipping box, if they are shipped collect, or if they are shipped to the wrong location. Information Solectria Renewables needs when you are obtaining service: 1) The model names and serial number of your product 2) Information about the installation and use of the unit 3) Information about the failure and/or reason for the return 4) A copy of your dated proof of purchase. Preparing the product for shipping: 1) Package the unit or component safely, preferably using the original box and packing materials sent with the unit or component. Please ensure that your product is shipped fully insured in the original packaging or equivalent. This warranty will not apply where the product is damaged due to improper packaging. 2) Include the following: a. The RMA number supplied by Solectria Renewables, LLC clearly marked on the outside of the box b. A return address to which the unit can be shipped. Post office boxes are not acceptable. c. A contact telephone number where you can be reached during work hours. d. A brief description of the problem. Ship the unit prepaid to the address provided by your Solectria Renewables customer service representative. Returning a product from outside of the USA or Canada: In addition to the above, you MUST include return freight funds and are fully responsible for all documents, duties, tariffs, and deposits. Contact information: Solectria Renewables LLC 360 Merrimack Street, Building 9 Lawrence, Massachusetts, 01843 USA Tel: 978.683.9700 Fax: 978.683.9702 Email: [email protected] Website: www.solren.com Installation and Operation Manual (Rev C) 40 SGI Series Inverters 9.0 Technical Data Input (DC) from PV array:  Maximum open circuit voltage of PV array is 600V DC WARNING: NEC 690‐7 must be followed to calculate the maximum number of PV modules allowed for a maximum inverter open circuit voltage (OCV) of 600V DC in extreme cold temperatures for the installation location. The open circuit voltage of PV modules depends on the cell temperature and the solar irradiation. The highest open circuit voltage occurs when the PV modules are at the coldest temperature and in bright sun. Because the PV modules also have a reduction in voltage at high cell temperatures, you must make sure the MPPT voltage of the strings will not drop below the minimum inverter DC input voltage in very hot temperature conditions. Both the maximum open circuit voltage (OCV) when at cold extreme and minimum MPPT voltage when at hot extreme can be calculated for a PV module using its specification sheet. PV module string sizing can then be used to determine how many modules can be used in a string. Visit www.solren.com/stringsizing.html to use Solectria’s interactive string sizing tool. Installation and Operation Manual (Rev C) 41 SGI Series Inverters 9.1 Input DC (PV) Specifications SGI 225 SGI 250 SGI 266 Standard Units SGI 300 SGI 500 Unit Operating voltage range 300‐600 VDC Input voltage MPPT range 300‐500 VDC Strike Voltage Maximum input current Continuous input current 390 768 853 908 768 853 908 Low DC Voltage Option Units Operating voltage range (low voltage option) Input voltage MPPT range (low voltage option) Strike Voltage (low voltage option) Maximum input current (low voltage option) Continuous input current (low voltage option) 1026 1026 1721 1721 VDC ADC ADC 285‐600 VDC 285‐500 VDC 370 VDC 808 898 956 1080 1812 ADC 808 898 956 1080 1812 ADC +/‐ 2% 272.5 600 308 516.5 kW VDC All Units DC voltage measurement accuracy Max continuous input power Maximum open circuit voltage Absolute Maximum open circuit voltage DC current measurement accuracy (SolZone option only) DC Ground Fault Trip Setting 230.5 256 625 VDC +/‐ 2% 4 5 ADC Table 9.1 – DC Input Specifications Installation and Operation Manual (Rev C) 42 SGI Series Inverters 9.2 Output AC Specifications The inverters are designed to feed power into a standard 60Hz, three‐phase AC utility service provided within a facility by a transformer with a rating of not less than the rating of the inverter(s) connected to it. As required by NEC, there must be a dedicated three‐phase circuit breaker for the PV inverter connection. The inverter is designed to work with the range of AC voltages for a three‐phase service defined by IEEE 1547‐2003 and ANSI C84.1. SGI 225 SGI 250 SGI 266 SGI 300 SGI 500 Unit Operating AC voltage range 88 – 110% VAC Turn‐on AC voltage range 92% – 105% VAC Default over/under voltage trip points and per IEEE Std 1547‐2003, Table 1 or utility specific order times codes Over voltage trip magnitude adjustability 100% ‐ 120% Vnom Under voltage trip magnitude adjustability 50% ‐ 100% Vnom Over / under voltage trip time adjustability 0.1 – 30 sec Voltage measurement accuracy +/‐ 2 % Operating frequency adjustability (60) ‐3.0 ‐ +0.5 Hz Under frequency trip time adjustability 0.16 – 300 sec Frequency measurement accuracy +/‐ 0.1 Hz Maximum Rated Output Current (208VAC) 624 693 738 832 1388 Arms external transformer Maximum Rated Output Current (208VAC) 624 693 738 N/A N/A Arms internal transformer Maximum Rated Output Current (480VAC) 271 301 320 360 602 Arms Maximum Rated Output Current (600VAC) 217 240 256 289 480 Arms Short Circuit Current Contribution Utility Short Circuit Current Output (480VAC) 271 301 320 360 602 Arms duration of 10 line cycles Peak Short Circuit Current Output (480VAC) 27 36 36 36 60 kApk duration of less than 300 microseconds AC current measurement accuracy + / ‐ 3% AC real power and energy + / ‐ 5% measurement accuracy Total Harmonic distortion (THD, @ full power)
< 3% Power Factor Unity, >0.99 Anti‐islanding protection per UL1741 / IEEE1547 / CSA22.2#107.1 Peak Efficiency 97.99% 97.98% 97.96% 97.90% 97.87% CEC Weighted Efficiency 97.5% 97.5% 97.5% 97.5% 97.0% Table 9.2 – AC Output Specifications Installation and Operation Manual (Rev C) 43 SGI Series Inverters 9.3 Other Specifications DC Ground Fault Protection Per UL 1741 DC Ground Fault Current Withstand Certified in UL 1741 testing to 3.2kADC, components rated to 25kADC DC Subcombiner Range 70A‐400A fuses available, 6‐32 pole DC Disconnect (Integral) Break load rated Operational Ambient Temperature ‐40° to 50°C (full power) Storage Temperature ‐40° to 70°C Cooling Automatic Forced Convection Inverter Enclosure Rain Proof per UL1741, NEMA 3R Switching Electronics Enclosure IP‐62 (sealed design) Sound Pressure Level (A‐Weighting) < 64dBA at 3m < 57dBA at 10m Table 9.3 – Other Specifications Installation and Operation Manual (Rev C) 44 SGI Series Inverters 500
450
400
AC Power Output (kW)
350
300
250
200
150
100
50
0
275
SGI 500
300
325
SGI 300
350
375
400
SGI 266
425 450 475 500
DC Input Voltage (VDC)
SGI 250
SGI 225
525
Strike Voltage
550
575
600
625
Strike Voltage (LV Option)
Figure 9.1 – AC Output Power of SGI Series Inverters 99%
Overall AC to DC Conversion Efficiency (%)
98%
97%
96%
95%
94%
93%
0%
10%
20%
SGI 500
30%
40%
50%
60%
70%
AC Nameplate Output Power (%)
SGI 300
SGI 266
SGI 250
80%
90%
100%
SGI 225
Figure 9.2 – Efficiency of SGI Series Inverters at 360VDC Input and 25C Ambient Temperature
Installation and Operation Manual (Rev C) 45 SGI Series Inverters 9.4 Internal Circuit Diagram The basic power flow within the SGI series of inverters is shown in the simplified one‐line diagrams below. Note that the GFDI circuit is not depicted. Figure 9.3 – Simplified Internal Circuit Diagram for SGI 500‐480VAC Figure 9.4 – Simplified Internal Circuit Diagram for SGI 300‐480VAC
Installation and Operation Manual (Rev C) 46 SGI Series Inverters 10.0 Appendices 10.1 Appendix A – SGI 225, 250, SGI 266, SGI 300 and SGI 500 Data Sheet http://www.solren.com/utility.html 10.2 Appendix B – String Sizing Tool http://www.solren.com/stringSizing.html 10.3 Appendix C – Contact Information Solectria Renewables LLC 360 Merrimack Street Building 9, 2nd floor Lawrence, Massachusetts 01843 USA Tel: 978.683.9700 Fax: 978.683.9702 Sales/ general info: [email protected] Customer Support: [email protected] Website: www.solren.com 10.4 Authorized Distributors See website for complete and updated listing: www.solren.com
Installation and Operation Manual (Rev C) 47 SGI Series Inverters 10.5 Appendix D – UL1741 / IEEE 1547 / CSA22.2#107.1 Listing Letter YOUR SK>dZ/ DISTRIBUTOR
SOLIGENT
800-967-6917
www.soligent.net
Installation and Operation Manual (Rev C) 48