SPR-3200, SPR-2900 and SPR-2000 Installation and

 SPR-3200, SPR-2900 and SPR-2000
Installation and Operation Manual
SunPower Corporation Document # 001‐69352 Rev** 1 SunPower Inverter
SPR-3200, SPR-2900 and SPR-2000
Table of Contents
SunPower Corporation Document # 001‐69352 Rev** 2 IMPORTANT SAFETY INSTRUCTIONS
This product has been engineered and manufactured to ensure your personal safety. Improper
use may result in potential electrical shock or burns. Please read and follow all instructions for
installation, use and servicing of this product.
Note: A locking tab has been designed into the SPR-3200, SPR-2900 and the SPR-2000. It is
the sole responsibility of the end user to provide a locking mechanism that utilizes the tab, and
permanently secures the cover on the inverter.
SAVE THESE INSTRUCTIONS – This manual contains important instructions for the
SunPower Inverter model numbers SPR-3200, SPR-2900 and the SPR-2000 that must be
followed during installation and maintenance of the SunPower Inverter.
All electrical installations should be done in accordance with local electrical codes and the
National Electrical Code (NEC), ANSI/NFPA 70.
Before connecting the SunPower Inverter to the electrical utility grid, approval must be granted
by your utility company. Only qualified electricians should make the connection.
When exposed to light, PV-arrays create electrical energy that could cause a hazardous condition.
To avoid this, completely cover the surface of all PV-arrays with opaque (dark) material before
wiring them.
The SunPower Inverter contains no user-serviceable parts. Refer servicing to qualified service
Do not touch the heat sink located at the top of the SunPower Inverter. Temperatures can exceed
158 degrees (70° C).
Please read all safety warnings and instructions before beginning the
installation or operation of the SunPower Inverter.
SunPower Corporation Document # 001‐69352 Rev** 3 SAVE THESE INSTRUCTIONS
The SunPower Inverter is a utility interactive inverter for photovoltaic (PV) systems. The
SunPower Inverter is tied to an electrical source provided by the local utility company (i.e. ongrid), as well as to the photovoltaic system. The SunPower Inverter contains everything
needed to convert the DC voltage generated by the solar arrays into the AC voltage required to
power a house. Because the inverter is tied to a local utility source, if a house’s electrical needs
exceed the power generated by the solar arrays, the house automatically taps into its local
power supply for that additional electricity. Likewise, if a house does not utilize all the power
generated by the solar panels, the inverter actually reverses the flow of electricity (i.e.
electricity is fed back into the grid). Think of it as accumulating credits of electricity with the
utility for future use.
The information contained within this manual will provide all the information necessary for
successful installation and use of the SunPower Inverter.
Product Features
Easy Installation
The custom designed mounting bracket and easy-to-follow instructions make installation
simple and quick.
Simple, Innovative Design
Everything needed to power up the SunPower Inverter is contained within the inverter
box, including AC and DC connections and circuits. Low part count keeps costs down and
simplifies the manufacturing, and installation processes.
Safety Features
The SunPower Inverter is designed for safety. Control power comes from the utility grid,
ensuring that power can never be generated during a utility grid failure. The output
stage transformer guarantees isolation of the utility grid and PV modules.
The SunPower Inverter is designed with growth in mind, from residential to commercial
use. Most PV system configurations can be accommodated.
SunPower Corporation Document # 001‐69352 Rev** 4 2.0 INSTALLATION
2.1 Selecting a Location for the SunPower Inverter
In choosing a location for the SunPower Inverter, consideration should be given to the
following criteria:
♦ The heat sink temperatures can exceed 158 degrees (70° C). The SunPower Inverter
must be installed so that the top of the unit will not be contacted by persons.
♦ The SunPower Inverter is suitable for installation both indoors and outdoors and the
enclosure has been given a NEMA 3R rating.
♦ When the SunPower Inverter is installed outdoors, it should be shielded from rain and
direct sunlight, if possible.
♦ The SunPower Inverter is designed to handle the temperature extremes of most
climates. The operating and non-operating ambient temperature range is from -25° C to
40° C.
♦ The following clearances are recommended for proper placement of the SunPower
• A minimum 36″ clearance between the bottom of the inverter box and the
• A minimum 12″ clearance above the inverter box for ventilation.
• A minimum 8” clearance around the side of the inverter box so that all Warning
and Caution labels are clearly visible and able to be easily read.
• Visibility of the operating LED’s and display located at the top front of the inverter
box should also be considered.
♦ If the SunPower Inverter is to be installed in an enclosed cabinet or closet, external
ventilation must be provided to allow for sufficient heat dissipation.
♦ At all times, air circulation around the inverter box must be sufficient.
SunPower Corporation Document # 001‐69352 Rev** 5 2.2 Mounting the SunPower Inverter
The SunPower Inverter should be mounted vertically to a flat, solid surface such as wallboard,
concrete or wood siding. The inverter should be located in close proximity to the solar panels
to minimize the DC wire length.
The mounting bracket provided makes mounting the SunPower Inverter quick and simple. The
two screw holes at either end of the bracket are 16 inches apart. Once the wall studs are
located, anchoring the bracket becomes an easy task.
WARNING: Prior to drilling holes to mount the SunPower Inverter in the location
selected; ensure there are no electrical wires or plumbing in the area.
The National Electrical Code (NEC) requires that the inverter be connected to a dedicated
circuit with no other outlets or devices connected to the same circuit. See NEC Section 69064(b)(1). The NEC also places limitations on the size of the inverter and the manner in which it
is connected to the utility grid. See NEC Section 690-64(b) (2).
2.2. A Steps to Mount the SunPower Inverter
1. Locate the wall studs in the desired location and align the mounting bracket over the
studs. Mark the mounting holes. Ensure that locations A and B (as indicated in Figure 1
below) are aligned over the wall studs.
2. MAKE SURE BRACKET IS LEVEL. Ensure points A and B are aligned with wall studs.
Drill 1/8”pilot holes for the screws. Use heavy-duty ¼” x 2”coarse thread lag screws to
secure points A and B to the wall. Use an 1/8” screw to secure point C. See Figure 1.
SunPower Corporation Document # 001‐69352 Rev** 6 5. Carefully hang the inverter on the upper part of the bracket so that the hooks located
at the rear of the inverter hang over the bracket.
6. Verify that the inverter is level.
7. Remove the front cover of the inverter by unscrewing the two cover screws located at
the bottom of the inverter.
8. Locate the two inverter mounting holes below the power board. (See Figure 2) Insert
the two mounting screws through the inverter and tighten securely.
PLEASE NOTE: Remove the lower inverter cover to allow for electrical connection in section 2.3
SunPower Corporation Document # 001‐69352 Rev** 7 2.3 Electrical Connection
Do not proceed with the electrical connection of the SunPower Inverter until it has been
properly mounted.
Electrical connections must be done in accordance with local electrical codes
and the National Electrical Code (NEC), ANSI/NFPA 70. Use 10 AWG, minimum 90° (194°F),
copper wire for the SPR-5200, SPR-4600 connections. Voltage drop as well as other
considerations may dictate that larger wire sizes be used.
WARNING: Make sure the main 240-volt breaker in the main utility breaker box is
switched OFF before wiring the SunPower Inverter. This breaker should be switched ON only
after all wiring has been completed as set forth in this manual.
Follow the order listed below in wiring the SunPower Inverter.
Failure to do so may result in hazardous voltages or disconnection of contacts.
Only rain tight or wet location conduit hubs that comply with the
requirements in the Standard for Fittings for Conduit and Outlet Boxes, UL 514B, are
to be used.
Terminal connections for the SunPower Inverter are located inside the inverter on the circuit
board at the bottom of the box. Solid wires up to 8 AWG (6mm²) and flexible wires up to 10
AWG (4mm²) are accepted by the AC terminals. Wires up to 6 AWG are accepted by the DC
CAUTION: The input and output circuits are isolated from the enclosure. System
grounding, when required by Sections 690-41, 690-42, and 690-43 of the National
Electric Code (NEC), ANSI/NFPA 70-1999, is the responsibility of the installer.
SunPower Corporation Document # 001‐69352 Rev** 8 2.3.b Grounding
single point ground connection is located in the lower right hand side of the
SunPower Inverter cabinet. The PV panel grounding wire is terminated there. The AC
ground connection is terminated next to the Line and Line 2/Neutral connections on the
circuit board. The PV ground is bolted to the cabinet with a ¼- 20 bolt. (Refer to Figure
♦ Figure 5 includes schematic representations of the SPR-5200, SPR-4600 single point
grounding. The front cover is grounded through the two cover mounting screws.
SunPower Corporation Document # 001‐69352 Rev** 9 2.3.b Connecting the SunPower Inverter to the Electrical Grid
Inside the SunPower Inverter are two circuit boards:
♦ The Control Board
♦ The Power Distribution Board:
• The AC connection terminal
• The DC connection terminal
• The Internal AC grid fuse(s)
• The Internal Ground Fault Interrupt fuse
For continued protection against risk of fire, replace only with same type and
ratings of fuse. The SPR-5200 and SPR-4600 both use only Littelfuse 30 AMP 250V AC rated
SunPower provides overcurrent protection on the Power Distribution Board with two 30 AMP
fuses in the SPR-5200 and SPR-4600 (See warning above). Additional over current protection
for the inverter’s AC output is provided by circuit breakers at the breaker panel.
WARNING: Replace GFI fuse with only same type and rating of fuse. The SPR-5200 and
SPR-4600 uses only Littelfuse KLKD001 1A/600V.
The SunPower Inverter is connected to the electrical grid using 3 wires - the LINE 1, LINE
Please Note: To avoid an increase in AC voltage to unacceptable values while the
SunPower Inverter is connected, the grid impedance value at the connection point
should be as low as possible. By keeping the grid impedance value low, higher system
efficiency will be achieved.
The total impedance of the grid plus the interconnecting AC wires should be less than
1.25 Ohm.
WARNING: Make sure the main 120/208/240 V breaker at the circuit breaker panel is
switched off before you connect the AC terminal block.
To wire the SunPower Inverter to the main utility grid, follow the steps outlined below (Refer to
Figure 7):
1. Run the conduit from the main breaker panel to the bottom of the SunPower Inverter
and insert the fitting in the center opening of the SunPower Inverter, fastening with a
locking nut.
SunPower Corporation Document # 001‐69352 Rev** 10 2. Feed the LINE 1, LINE 2/NEUTRAL and GROUND wires through the conduit and into the
center opening of the SunPower Inverter.
3. Connect the GROUND wire to the terminal marked ‘earth ground’ inside the SunPower
4. Connect the LINE 2/NEUTRAL wire to the terminal marked ‘line 2/neutral’ inside the
SunPower Inverter.
5. Connect the LINE wire to the terminal marked ‘line’ inside the SunPower Inverter.
6. Ensure all connections are wired correctly and properly torqued. Tighten the terminal
block screws to 1.7Nm.
2.3.c Connecting DC Wires/PV Panels
Before proceeding with the DC wiring, completely cover the surface of all PVarrays with dark material to avoid the production of electrical current.
Make sure the polarity and the PV panel voltage between the + and the –
cable connectors of the PV panels are correct. Then connect the panels to the DC terminal
block on the power distribution board.
The SPR-4600-208 and SPR-5200-240 are configured for positive ground
SunPower Corporation Document # 001‐69352 Rev** 11 The PV panel open circuit voltage should be at or below the listed voltages in Figure 8 under all
circumstances. Each DC input to the DC terminal block must be less than the voltages listed in
Figure 8.
To wire the DC inputs from the PV panels to the SunPower Inverter (Refer to Figure 9): Note:
Each DC input connection must carry the same input voltage. The SunPower Inverter allows up
to three connections for both the + and the – pole.
1. Calculate the maximum open circuit (no load) for each series panel connection. FOR
SUNPOWER INVERTER MODEL. Review your panel’s data sheet for operating
temperature ranges.
2. Keep track of the array positive and negative leads and mark them clearly.
3. Route the PV array leads through the far right opening in the SunPower Inverter.
4. Connect each series positive DC lead to the positive terminals of the power distribution
5. Connect negative DC leads directly to the negative terminal on the power distribution
6. Connect the ground wire(s) to the ground lug.
7. Confirm that the DC disconnect is turned off and remove the material from the array.
With a voltmeter, check the PV array positive leads and confirm that the voltage is
positive when referenced to the negative leads. The reading should match your series
Voc total.
SunPower Corporation Document # 001‐69352 Rev** 12 3.0 OPERATION
3.1 Start Up Procedures for the SunPower Inverter
Before turning on the SunPower Inverter ensure that the front panel is
closed properly.
The heat sink can reach temperatures in excess of 158º (70ºC). Care must be
taken to not touch the heat sink when in use. Nothing should be placed on top of the heat
Starting up the SunPower Inverter requires the following steps in the order indicated below:
1. Turn the AC breaker ON.
2. Verify that a red LED light is illuminated.
3. Remove the dark cover from the PV panels.
4. Check the polarity to make sure the + and – are wired correctly and confirm that the PV
panel open circuit voltage is at or below the level specified in Figure 8.
5. Turn the DC breaker ON (If installed).
SunPower Corporation Document # 001‐69352 Rev** 13 6. IT IS RECOMMENDED THAT YOU ATTACH A PADLOCK AT THIS TIME TO
7. After 5 minutes, the SunPower Inverter will start to produce power into the AC grid if all
necessary operating conditions are met.
NOTE: During the initial 5 minutes prior to producing power, the inverter will display
“0000 0000 0000”. This is a normal.
3.2 LED Indicator Lights/Vacuum Fluorescent Display
The SunPower Inverter SPR-5200, SPR-4600 all display 2 LED indicator lights visible through
the upper left corner of the front panel. These lights will indicate the SunPower Inverter’s
If the SunPower Inverter’s operating environment is safe to produce power into the AC grid,
the “OK” (Green) LED is illuminated.
If at any moment the operating environment moves outside the safe operating limits, governed
by UL 1741, IEEE 519, and NEC 690, the “STAND BY” (Red) LED indicator will be illuminated.
The SunPower Inverter is continuously monitoring:
1. The AC grid connection to ensure the AC voltage and frequency levels are within safe
operating limits (per UL and NEC specifications).
2. The DC PV panel input(s) to ensure safe operating conditions (per UL and NEC
3. The SunPower Inverter itself to ensure only safe operating conditions exist within the
operating environment.
If all 3 conditions are met the inverter will illuminate the “OK” (Green) LED.
If any one of the operating conditions is not met there is a fault and the SunPower Inverter will
illuminate the “STAND BY” (Red) LED.
The “STAND BY” (Red) LED will illuminate when the PV panel voltage is not within safe
operating limits. This will occur at sunset, when the inverter will turn off for the night. Anytime
the level of sunlight is too low for the PV panels to produce 205 volts of DC for the SPR-4600 &
240 volts of DC for the SPR-5200’s, the inverter will turn off. This ensures only safe and clean
(low distortion) power is being generated. When the panels are once again exposed to enough
sunlight, the SunPower Inverter’s auto-start feature will begin, and after 5 minutes, the “OK”
(Green) LED should illuminate
SunPower Corporation Document # 001‐69352 Rev** 14 If the “STAND BY” (Red) LED continues to illuminate when there is sufficient sunlight for
operation, verify all wiring connections are solid. See Section 4.0 Troubleshooting.
The vacuum fluorescent display will indicate the SunPower Inverter status and real-time power
output into the AC Grid. This display will provide the following information:
• AC power produced in real-time
• PV input in real-time
• Total Output as kW-hr
• Greenhouse gases saved in lbs
If a fault has occurred, the display will also provide a fault code that corresponds to a set of
defined faults. Please refer to Section 4.0 Troubleshooting.
If the SunPower Inverter’s “STAND BY” LED remains solid red or blinking red for a prolonged
period (more than 24 hours), the AC breaker or AC disconnect should be turned to the OFF
position for 1 minute and then returned to the ON position. After reset, if both AC and DC
operational specifications are met, the red LED is OFF and the green LED is illuminated. If after
AC is reset the red “STAND BY” light remains illuminated or blinking, double-check all
connections and voltage levels. If the red “STAND BY” light is still illuminated or blinking,
contact your authorized dealer/distributor for product support.
The LEDs will display the following light indicators when a fault has occurred:
SunPower Corporation Document # 001‐69352 Rev** 15 The vacuum fluorescent display will provide the following codes when a fault has occurred:
As indicated above, there are three 16-bit codes assigned to describe faults, one of which will
always remain zero. More than one fault can be represented at a time. This will be indicated by
a fault with a code equal to the sum of the individual faults.
For example:
EX 1: Fault Code 1000 0000 0480
The first code indicates this is a voltage fault of some kind.
The 4 in code three indicates an AC over voltage.
The 8 in code three indicates the AC frequency was out of bounds.
EX 2: Fault Code 8004 0000 0000
The 8 in the first code indicates a power module fault.
The 4 in the first code indicates a heat sink over temperature fault.
These servicing instructions are for use by qualified personnel only. To
reduce the risk of electric shock, do not perform any servicing other than that specified in the
operating instructions unless you are qualified.
SunPower Corporation Document # 001‐69352 Rev** 16 5.0 SPECIFICATIONS
SunPower Corporation Document # 001‐69352 Rev** 17 6.0 Return Procedure
Before returning the product directly to SunPower Corporation, you must first obtain a Return
Authorization Number from SunPower Corporation. The product must also be shipped
prepaid. When you contact a SunPower Corporation representative, please have the following
information ready:
1. The serial number of the product
2. The reason for the return
3. A copy of your dated proof of purchase
When you return the product to SunPower Corporation, SunPower Corporation advises that the
original packaging or equivalent be used and that the product is shipped fully insured.
SunPower Corporation is not responsible for damage to the product due to improper
On the packaging please include the following:
1. The Return Authorization Number supplied by SunPower Corporation clearly marked
on the outside of the box.
2. A return address where the product can be shipped.
3. A telephone number where you can be reached during business hours.
4. A brief description of the problem.
Ship the product
Information About Your System
Note the following information for your records and retain your dated proof of purchase:
Serial Number
Purchased From
Date of Purchase
SunPower Corporation Document # 001‐69352 Rev** 18 Notes:
SunPower Corporation Document # 001‐69352 Rev** 19 SunPower Corporation Document # 001‐69352 Rev** 20 SunPower Corporation Document # 001‐69352 Rev** 21 
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