Grape Solar GS-MPPT-ZENITH-40 Zenith 40-Amp Charge Controller Operating Guide
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Material Code : 1.1.24.01488
Grape Solar ZENITH Series
Solar Charge and Load Controller
User Manual
ZENITH MPPT CHARGE CONTROLLER
OPTIONS
SOLAR
+ -
BATTERY DC LOAD
+ + + -
Model
Battery voltage
Max. solar panel voltage
GS-MPPT-ZENITH-20 GS-MPPT-ZENITH-40
12V/ 24V with Auto-Recognition
100V (25°C), 90V (-25°C)
Charging current
Discharging current
20A
20A
40A
Version: 1.05
The above information is subject to change without prior notice.
Dear users,
Thank you for choosing our product !
Safety Instructions
1. When configuring this controller, you could be working with voltages high enough to pose a shock hazard, so do not connect anything before reading this manual carefully, and completing training for safe handling of electrical components
2. The controller has no internal components which require inspection, maintenance or service. Do not attempt to disassemble or repair the controller as doing so will void the warranty.
3. Install the controller indoors to avoid component exposure to water. The terminals are especially vulnerable to corrosion in marine environments.
4. The cooling fins may get warm during normal operation, so install the controller in an area free of obstructions and with good ventilation.
5. It is recommended that fuses or breakers be used on the input and output wiring for the controller.
6. When installing and wiring the controller, be sure to cover the panels with cloth or cardboard, and turn off any breakers on either side of the controller.
7. Loose connections can cause overheating of the controller terminals and wiring which can pose a fire hazard. Double-check that all your connections are tight when wiring the controller.
Warning: means the operation in question is dangerous, and you should get properly prepared before proceeding.
!
Note: means the operation in question may cause damage.
Tips: means advice or instruction for the operator.
01
Table of Contents
1. Product Introduction
1.1 Product Overview
1.2 Product Features
1.3 Exterior and Interfaces
1.4 Introduction to Maximum Power Point Tracking Technology
1.5 Charging Stages Introduction
2. Product Installation
2.1 Installation Precautions
2.2 Wiring Specifications
2.3 Installation and Wiring
3. Product Operation and Display
3.1 LED Indicators
3.2 Key Operations
3.3 LCD Startup and Main Interface
3.4 Load Mode Setting Interface
3.5 System Parameter Settings
4. Product Protection Function and System Maintenance
4.1 Protection Functions
4.2 System Maintenance
4.3 Abnormality Display and Warnings
5. Product Specification Parameters
5.1 Electric Parameters
5.2 Battery Type Default Parameters
(parameters set in monitor software)
6. Conversion Efficiency Curve
6.1 12V System Conversion Efficiency
6.1 24V System Conversion Efficiency
7. Product Dimensions
02
03
03
03
04
04
06
07
07
08
08
11
11
12
12
13
14
15
15
16
16
17
17
18
19
19
19
20
1. Product Introduction
1.1 Product Overview
◆ This controller can charge the battery most efficiently by dynamically loading the panel to deliver its maximum power even during rapidly changing conditions, and monitoring the State Of Charge (SoC) of the battery. It is designed to function as the primary control unit in an off-grid photovoltaic system, and to provide an intelligent interface between solar panels, battery, and load.
◆ The large LCD screen can display the current status, operating parameters, and controller logs in real time. Userfriendly buttons and display prompts provide flexibility of configuration, and safe and sensible default settings make first-time setup easy for most users.
◆ Powerful internal fault detection and other electronic protection features inside the controller help prevent component damage if installation errors and accidents occur.
1.2 Product Features
◆ Though partial shading conditions may cause dual or multiple peaks on the I-V curve, the controller is still able to accurately track the maximum power point with advanced dual and multi-peak power point tracking technology.
◆ A combination of maximum power point tracking (MPPT) algorithms can raise charging efficiency by 15-20% over conventional PWM methods, and provide quick automatic adjustments on-the-fly in variable and rapidly changing conditions.
◆ An on-board MPPT tracking algorithm with 99.9% accuracy and advanced digital power supply technology raise the power conversion efficiency to as high as 98%.
◆ Auto-recognition of 12V and 24V batteries and charging program presets are available for most battery types including sealed GEL and AGM, Flooded, and Lithium.
◆ A protection feature called current-limiting mode or "clipping" is activated whenever an oversized solar array is producing power which exceeds the controller's rated output.
◆ Instantaneous large current startup of capacitive loads is supported.
◆ LED status indicators and an LCD screen which can display errors help users quickly identify faults and configuration problems.
◆ Historical data storage function is available, and data can be stored for up to a year.
◆ The controller has over-temperature protection. Charging current will be limited in cases of overheating of the controller.
◆ The controller's temperature compensation function can automatically adjust charging and load parameters to extend battery service life..
◆ TVS lighting protection
03
1.3 Exterior and Interfaces
①
②
③
④
ZENITH MPPT CHARGE CONTROLLER
⑦
⑤
⑥
OPTIONS
SOLAR
+ -
+ -
BATTERY
+ -
DC LOAD
+ -
⑭ ⑧ ⑨ ⑩ ⑪ ⑫⑬
Fig. 1-1 Product appearance and interfaces
③
④
⑤
⑥
⑦
⑧
⑨
No.
①
②
Item
Charging indicator
Battery indicator
Load indicator
Abnormality indicator
LCD screen
Operating keys
Installation hole
Solar panel "+" interface
Solar panel "-" interface
⑫
⑬
⑭
No.
⑩
⑪
Item
Battery "+" interface
Battery "-" interface
Load "+" interface
Load "-" interface
External temperature sampling interface
1.4 Introduction to Maximum Power Point Tracking Technology
Maximum Power Point Tracking (MPPT) is an advanced charging technology that enables the solar panel to output more power by adjusting the electric module's operating status. Due to the nonlinearity of solar arrays, there exists a maximum energy output point (maximum power point) on their curves. Unable to continuously lock onto this point to charge the battery, conventional controllers (employing switching and PWM charging technologies) can't get the most of the power from the solar panel. But a solar charge controller featuring MPPT technology can continuously track arrays' maximum power point so as to get the maximum amount of power to charge the battery.
Take a 12V system as an example. As the solar panel's peak voltage (Vpp) is approximately 17V while the battery's voltage is around 12V, when charging with a conventional charge controller, the solar panel's voltage will stay at around
12V, failing to deliver the maximum power. However, the MPPT controller can overcome the problem by adjusting the solar panel's input voltage and current in real time, realizing a maximum input power.
04
Compared with conventional PWM controllers, the MPPT controller can make the most of the solar panel's max. power and therefore provide larger charging current. Generally speaking, the latter can raise the energy utilization ratio by
15% to 20% in contrast with the former.
5. 0
4. 5
4. 0
3. 5
3. 0
2. 5
2. 0
1. 5
1. 0
0. 5
I ( A )
0. 0 2. 8
PWM charging
MPPT point
5. 6 8. 4 11. 2 14. 0 16. 8 19. 6
Fig. 1-2 Solar panel output characteristic curve
VP curve
VI curve
P( W )
27. 0
13. 5
0. 0
U ( V )
94. 5
81. 0
67. 5
54. 0
40. 5
Meanwhile, due to changing ambient temperature and illumination conditions, the max. power point varies frequently, and our MPPT controller can adjust parameter settings according to the environmental conditions in real time, so as to always keep the system close to the max. operating point. The whole process is entirely automatic without the need of human intervention.
I ( A)
I (A)
Current decreases with dwindling light
With temperature dropping, current stays stable and power increases
Open-circuit voltage decreases with dwindling light
U( V )
Fig. 1-3 Relation between solar panel output characteristics and illumination
U( V)
Open-circuit voltage decreases with rising temperature
Fig. 1-4 Relation between solar panel output characteristics and temperature
20℃
30℃
40 ℃
50℃
60℃
70℃
05
1.5 Charging Stages Introduction
As one of the charging stages, MPPT can not be used alone, but has to be used together with boost charging, floating charging, equalizing charging, etc. to complete charging the battery. A complete charging process includes: fast charging, sustaining charging and floating charging. The charging curve is as shown below:
Battery voltage
Equalizing charging voltage
Boost charging voltage
A B C
Fast charging Sustaining charging Floating charging
B ul k
Floating charging voltage
Charging return voltage
Boost
Time
Charging Current
Duration: 2h
(range: 10 to 600min)
Max. current
Cumulative time: 3h
Time
Fig. 1-5 Battery charging stages diagram a) Fast charging
At the fast charging stage, as the battery voltage has not reached the set value of full voltage (i.e. equalizing/ boost voltage) yet, the controller will perform MPPT charging on the battery with the maximum solar power. When the battery voltage reaches the preset value, constant voltage charging will begin.
b) Sustaining charging
When the battery voltage reaches the set value of sustaining voltage, the controller will switch to constant voltage charging. In this process, no MPPT charging will be performed, and meanwhile the charging current will also gradually decrease. The sustaining charging stage itself consists of two sub-stages, i.e. equalizing charging and boost charging, the two of which are not carried out in a repeated manner, with the former getting activated once every 30 days.
> Boost charging
By default, boost charging generally lasts for 2h, but users can adjust preset values of duration and boost voltage point according to the actual needs. When the duration reaches the set value, the system will then switch to floating charging.
06
>Equalizing charging
Warning: risk of explosion!
In equalizing charging, an open lead-acid battery can produce explosive gas, therefore the battery chamber shall have good ventilation conditions.
!
Note: risk of equipment damage!
Equalizing charging may raise the battery voltage to a level that may cause damage to sensitive DC loads. Check and make sure that allowable input voltages of all the loads in the system are greater than the set value for battery equalizing charging.
!
Note: risk of equipment damage!
Overcharge or too much gas generated may damage battery plates and cause active material on the battery plates to scale off. Equalizing charging to an excessively high level or for too long a period may cause damage. Read carefully the actual requirements of the battery deployed in the system.
Some types of batteries benefit from regular equalizing charging which can stir the electrolyte, balance the battery voltage and finish the electrochemical reaction. Equalizing charging raises the battery voltage to a higher level than the standard supply voltage and gasify the battery electrolyte. If the controller then automatically steers the battery into equalizing charging, the charging duration is 120 mins (default). In order to avoid too much generated gas or battery overheat, equalizing charging and boost charging won’t repeat in one complete charging cycle.
Note:
1) When due to the installation environment or working loads, the system can't continuously stabilize the battery voltage to a constant level, the controller will initiate a timing process, and 3 hours after the battery voltage reaches the set value, the system will automatically switch to equalizing charging.
2) If no calibration has been done to the controller clock, the controller will perform equalizing charging regularly according to its internal clock.
>Floating charging
When finishing the sustaining charging stage, the controller will switch to floating charging in which the controller lowers the battery voltage by diminishing the charging current and keeps the battery voltage at the set value of floating charging voltage. In the floating charging process, very light charging is carried out for the battery to maintain it at full state. At this stage, the loads can access almost all the solar power. If the loads consume more power than the solar panel could provide, the controller will not be able to keep the battery voltage at the floating charging stage. When the battery voltage drops to the set value for returning to boost charging, the system will exit floating charging and reenter into fast charging.
2. Product Installation
2.1 Installation Precautions
• Be very careful when installing the battery. For open lead-acid batteries, wear a pair of goggles during installation, and in case of contact with battery acid, flush with water immediately.
• In order to prevent the battery from being short-circuited, no metal objects shall be placed near the battery.
• Acid gas may be generated during battery charging, thus make sure the ambient environment is well ventilated.
• Keep the battery away from fire sparks, as the battery may produce flammable gas.
• When installing the battery outdoors, take sufficient measures to keep the battery from direct sunlight and rain water intrusion.
• Loose connections or corroded wire may cause excessive heat generation which may further melt the wire's insulation
07 layer and burn surrounding materials, and even cause a fire, therefore make sure all connections are tightened securely.
Wires had better be fixed properly with ties, and when needs arise to move things, avoid wire swaying so as to keep connections from loosening.
• When connecting the system, the output terminal's voltage may exceed the top limit for human safety. If operation needs to be done, be sure to use insulation tools and keep hands dry.
• The wiring terminals on the controller can be connected with a single battery or a pack of batteries. Following descriptions in this manual apply to systems employing either a single battery or a pack of batteries.
• Follow the safety advice given by the battery manufacturer.
• Connect the controller's earth terminal to the ground.
2.2 Wiring Specifications
Wiring and installation methods must comply with national and local electrical specifications.
The wiring specifications of the battery and loads must be selected according to rated currents, and see the following table for wiring specifications:
Model
ML2420
ML2440
Rated charging current
20A
40A
Rated discharging current
20A
20A
Battery wire diameter (mm2)
4 mm 2
10 mm
2
Load wire diameter (mm2)
4 mm
2
4 mm 2
2.3 Installation and Wiring
Warning: risk of explosion! Never install the controller and an open battery in the same enclosed space! Nor shall the controller be installed in an enclosed space where battery gas may accumulate.
≥ 150mm
Hot air
Warning: danger of high voltage! Photovoltaic arrays may produce a very high open-circuit voltage. Open the breaker or fuse before wiring, and be very careful during the wiring process.
!
Note: when installing the controller, make sure that enough air flows through the controller's radiator, and leave at least 150 mm of space both above and below the controller so as to ensure natural convection for heat dissipation. If the controller is installed in an enclosed box, make sure the box delivers reliable heat dissipation effect.
≥ 150mm
ZENITH MPPT CHARGE CONTROLLER
OPTIONS
SOLAR
+ -
+ -
BATTERY
+ -
DC LOAD
+ -
Cold air
Fig. 2.1 Installation and heat dissipation
08
Step 1: choose the installation site
Do not install the controller at a place that is subject to direct sunlight, high temperature or water intrusion, and make sure the ambient environment is well ventilated.
Step 2: first place the installation guide plate at a proper position, use a marking pen to mark the mounting points, then drill 4 mounting holes at the 4 marked points, and fit screws in.
Step 3: fix the controller
Aim the controller's fixing holes at the screws fit in Step 2 and mount the controller on.
Step 4: wire
First remove the two screws on the controller, and then begin wiring operation. In order to guarantee installation safety, we recommend the following wiring order; however, you can choose not to follow this order and no damage will be incurred to the controller.
① Connecting to external temperature sampling interface
② Connecting communication cable
③ Connecting power cable
Warning: risk of electric shock! We strongly recommend that fuses or breakers be connected at the photovoltaic array side, load side and battery side so as to avoid electric shock during wiring operation or faulty operations, and make sure the fuses and breakers are in open state before wiring.
Warning: danger of high voltage! Photovoltaic arrays may produce a very high open-circuit voltage. Open the breaker or fuse before wiring, and be very careful during the wiring process.
Warning: risk of explosion! Once the battery's positive and negative terminals or leads that connect to the two terminals get short-circuited, a fire or explosion will occur. Always be careful in operation.
First connect the battery, then the load, and finally the solar panel. When wiring, follow the order of first
"+" and then "-".
④ Power on
After connecting all power wires solidly and reliably, check again whether wiring is correct and if the positive and negative poles are reversely connected. After confirming that no faults exist, first close the fuse or breaker of the battery, then see whether the LED indicators light up and the LCD screen displays information. If the LCD screen fails to display information, open the fuse or breaker immediately and recheck if all connections are correctly done.
If the battery functions normally, connect the solar panel. If sunlight is intense enough, the controller's charging indicator will light up or flash and begin to charge the battery.
After successfully connecting the battery and photovoltaic array, finally close the fuse or breaker of the load, and then you can manually test whether the load can be normally turned on and off. For details, refer to information about load working modes and operations.
4
3
7
ZENITH MPPT CHARGE CONTROLLER
OPTIONS
SOLAR
+ -
+ -
BATTERY
+ -
DC LOAD
+ -
1
2
09
5
6
Warning: when the controller is in normal charging state, disconnecting the battery will have some negative effect on the DC loads, and in extreme cases, the loads may get damaged.
Warning: within 10 minutes after the controllers stops charging, if the battery's poles are reversely connected, internal components of the controller may get damaged.
Note:
1) The battery's fuse or breaker shall be installed as close to the battery side as possible, and it's recommended that installation distance be not more than 150mm.
2) If no remote temperature sensor is connected to the controller, the battery temperature value will stay at 25 °C.
3) If an inverter is deployed in the system, directly connect the inverter to the battery, and do not connect it to the controller's load terminals.
10
3. Product Operation and Display
3.1 LED Indicators
PV array indicator
BAT indicator
LOAD indicator
ERROR indicator
Indicating the controller's current charging mode.
Indicating the battery's current state.
Indicating the loads' On/ Off and state.
Indicating whether the controller is functioning normally.
No.
①
②
③
④
PV array indicator:
Graph
⑤
⑥
Indicator state Charging state
Steady on MPPT charging
Slow flashing
(a cycle of 2s with on and off each lasting for 1s)
Single flashing
(a cycle of 2s with on and off lasting respectively for
0.1s and 1.9s)
Quick flashing
(a cycle of 0.2s with on and off each lasting for 0.1s)
Boost charging
Floating charging
Equalizing charging
Double flashing
(a cycle of 2s with on for 0.1s, off for 0.1s, on again for 0.1s, and off again for 1.7s)
Current-limited charging
Off No charging
BAT indicator:
Indicator state
Steady on
Slow flashing
(a cycle of 2s with on and off each lasting for 1s)
Quick flashing
(a cycle of 0.2s with on and off each lasting for 0.1s)
LOAD indicator:
Indicator state
Off
Quick flashing
(a cycle of 0.2s with on and off each lasting for 0.1s)
Steady on
Battery state
Normal battery voltage
Battery over-discharged
Battery over-voltage
Load state
Load turned off
Load overloaded/ short-circuited
Load functioning normally
11
ERROR indicator:
Indicator state
Off
Steady on
3.2 Key Operations
Up
Down
Return
Page up; increase the parameter value in setting
Page down; decrease the parameter value in setting
Return to previous menu (exit without saving)
Set
Enter into sub-menu; set/ save
Turn on/ off loads (in manual mode)
Abnormality indication
System operating normally
System malfunctioning
3.3 LCD Startup and Main Interface
Nighttime Daytime Solar panel Charging
Battery
Discharging Load
Charging stage
System voltage
Parameter value
Unit
Battery type
Setting Abnormality
12
3.3.1 Startup interface
During startup, the 4 indicators will first flash successively, and after self-inspection, the LCD screen starts and displays the battery's voltage level which will be either a fixed voltage selected by the user or a voltage automatically recognized.
3.3.2 Main interface
Main monitoring page Component voltage Charging current
Abnormality code
Battery voltage Battery capacity
Load current Charging capacity
Load mode Device temperature Discharging capacity
3.4 Load Mode Setting Interface
3.4.1 Load modes introduction
This controller has 5 load operating modes which will be described below:
13
No.
0
1~14
Mode Descriptions
Sole light control
(nighttime on and daytime off)
Light control + time control
1 to 14 hours
When no sunlight is present, the solar panel voltage is lower than the light control on voltage, and after a time delay, the controller will switch on the load; when sunlight emerges, the solar panel voltage will become higher than the light control off voltage, and after a time delay, the controller will switch off the load.
When no sunlight is present, the solar panel voltage is lower than the light control on voltage, and after a time delay, the controller will switch on the load. The load will be switched off after working for a preset period of time.
15
16
17
Manual mode
Debugging mode
Normal on mode
In this mode, the user can switch the load on or off by the keys, no matter whether it's day or night. This mode is designed for some specially purposed loads, and also used in the debugging process.
Used for system debugging. With light signals, the load is shut off; without light signals, the load is switched on. This mode enables fast check of the correctness of system installation during installation debugging.
The energized load keeps outputting, and this mode is suitable for loads which need 24-hour power supply.
3.4.2 Load mode adjustment
Users can adjust the load mode as needed on their own, and the default mode is debugging mode (see "load modes introduction"). The method for adjusting load modes is as follows:
Load mode
Press and hold the
Set key to enter
Tap the Up or
Down key to set the mode
Press and hold the
Set key to save and exit
Tap the Return key to exit without saving
3.4.3 Manual load on/ off page
Manual operation is effective only when the load mode is manual mode (15), and tap the Set key to switch on/ off the load under any main interface.
3.5 System Parameter Settings
Under any interface other than load modes, press and hold the Set key to enter into the parameter setting interface.
Battery type System voltage Equalizing voltage Boost voltage
Over-discharge voltage Over-discharge return voltage Floating charging voltage
14
After entering into the setting interface, tap the Set key to switch the menu for setting, and tap the Up or Down key to increase or decrease the parameter value in the menu. Then tap the Return key to exit (without saving parameter setting), or press and hold the Set key to save setting and exit.
!
Note: after system voltage setting, power supply has to be switch off and then on again, otherwise the system may work under an abnormal system voltage.
The controller enables users to customize the parameters according to the actual conditions, but parameter setting must be done under the guidance of a professional person, or else faulty parameter settings may render the system not able to function normally. For details about parameter settings, see table 3
No.
5
6
3
4
1
2
7
Displayed item
TYPE OF BAT
VOLT OF SYS
EQUALIZ CHG
BOOST CHG
FLOAT CHG
LOW VOL RECT
LOW VOL DISC
Parameter setting cross-reference table
Description Parameter range
Battery type User/flooded/Sealed/Gel
System voltage
Equalizing charging voltage
Boost charging voltage
Floating charging voltage
Over-discharge recovery voltage
Over-discharge voltage
12V/24V
9.0
~ 17.0V
9.0
~ 17.0V
9.0
~ 17.0V
9.0
~ 17.0V
9.0
~ 17.0V
Table 3
4. Product Protection Function and System Maintenance
Default setting
Sealed
AUTO
14.6V
14.4V
13.8V
12.6V
11.0V
4.1 Protection Functions
· Waterproof
Waterproof level: Ip32
· Input power limiting protection
When the solar panel power exceeds the rated power, the controller will limit the solar panel power under the rated power so as to prevent excessively large currents from damaging the controller and enter into current-limited charging.
· Battery reverse connection protection
If the battery is reversely connected, the system will simply not operate so as to protect the controller from being burned.
· Photovoltaic input side too high voltage protection
If the voltage on the photovoltaic array input side is too high, the controller will automatically cut off photovoltaic input.
· Photovoltaic input side short-circuit protection
If the photovoltaic input side gets short-circuited, the controller will halt charging, and when the short circuit issue gets cleared, charging will automatically resume.
· Photovoltaic input reverse-connection protection
When the photovoltaic array is reversely connected, the controller will not break down, and when the connection problem gets solved, normal operation will resume.
· Load overpower protection
When the load power exceeds the rated value, the load will enter into delay protection.
· Load short-circuit protection
When the load is short-circuited, the controller can implement protection in a quick and timely manner, and will try to switch on the load again after a time delay. This protection can be carried out up to 5 times a day. Users can also manually address the short circuit problem when finding the load is short-circuited via the abnormality codes on the system data analysis page.
· Reverse charging protection at night
This protection function can effectively prevent the battery from discharging through the solar panel at night.
· TVS lighting protection.
· Over-temperature protection.
15
When the controller temperature exceeds the set value, it will decrease the charging power or halt charging.
See the following diagram:
ChgP :/%
100%
95%
85%
80%
75%
65%
60%
55%
45%
40%
35%
25%
20%
15%
5 %
0
0 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79
TemMOS :/ ℃
4.2 System Maintenance
Fig. 4-1
◆
In order to always keep the controller's performance at its optimum level, we recommend that the following items be checked twice a year.
◆ Make sure the airflow around the controller is not blocked and clear away any dirt or debris on the radiator.
◆ Check if any exposed wire gets its insulation undermined due to exposure to sunlight, friction with other adjacent objects, dry rot, damage by insects or rodents, etc. Repair or replace those affected when necessary.
◆ Verify that indicators function in line with device operations. Note any faults or displayed errors and take corrective measures if necessary.
◆ Check all wiring terminals for any sign of corrosion, insulation damage, overheat, combustion/ discoloration, and tighten the terminal screws firmly.
◆ Check if there are any dirt, nesting insects or corrosion, and clean as required.
◆ If the lightening arrester has lost its efficacy, replace it with a new one timely to prevent the controller and even other devices owned by the user from being damaged by lightening.
Warning: risk of electric shock! Before carrying out the above checkings or operations, always make sure all power supplies of the controller have been cut off!
4.3 Abnormality Display and Warnings
No.
4
5
6
1
2
3
7
9
11
12
Error display
EO
E1
E6
E8
E10
E13
E2
E3
E4
E5
Description
No abnormality
Battery over-discharge
System over-voltage
Battery under-voltage warning
Load short circuit
Load overloaded
Over-temperature inside controller
Photovoltaic component overloaded
Photovoltaic component over-voltage
Photovoltaic component reversely connected
LED indicationk
ERROR indicator off
BAT indicator flashing slowly ERROR indicator steady on
BAT indicator flashing quickly ERROR indicator steady on
ERROR indicator steady on
LOAD indicator flashing quickly ERROR indicator steady on
LOAD indicator flashing quickly ERROR indicator steady on
ERROR indicator steady on
ERROR indicator steady on
ERROR indicator steady on
ERROR indicator steady on
16
5. Product Specification Parameters
5.1 Electric Parameters
Parameter
Model
System voltage
No-load loss
Battery voltage
Max. solar input voltage
Max. power point voltage range
Rated charging current
Rated load current
Max. capacitive load capacity
Max. photovoltaic system input power
Conversion efficiency
MPPT tracking efficiency
Temperature compensation factor
Operating temperature
Protection degree
Weight
Altitude
Product dimensions
Value
GS-MPPT-ZENITH-20
12V/24VAuto
GS-MPPT-ZENITH-40
0.7 W to 1.2W
9V to 35V
100V ( 25℃ ) 90V (25℃ )
Battery Voltage + 2V to 75V
20A 40A
20A
10000uF
260W/12V
520W/24V
550W/12V
1100W/24V
≤ 98%
> 99%
-3mv/℃/2V ( default )
35℃ to + 45℃
IP32
1.4Kg
2Kg
≤ 3000m
210*151*59.5mm 238*173*72.5mm
5.2 Battery Type Default Parameters
(parameters set in monitor software)
Voltage to set
Battery type
Over-voltage cut-off voltage
Equalizing voltage
Boost voltage
Floating charging voltage
Boost return voltage
Low-voltage cut-off return voltage
Under-voltage warning return voltage
Under-voltage warning voltage
Low-voltage cut-off voltage
Discharging limit voltage
Over-discharge time delay
Equalizing charging duration
Parameters cross-reference table for different types of batteries
Sealed lead-acid battery
16.0V
14.6V
14.4V
13.8V
13.2V
12.6V
12.2V
12.0V
11.1V
10.6V
5s
120 minutes
Gel lead-acid battery
16.0V
——
14.2V
13.8V
13.2V
12.6V
12.2V
12.0V
11.1V
10.6V
5s
——
Open lead-acid battery
16.0V
14.8V
14.6V
13.8V
13.2V
12.6V
12.2V
12.0V
11.1V
10.6V
5s
120 minutes
User (self-customized)
9 ~ 17V
9 ~ 17V
9 ~ 17V
9 ~ 17V
9 ~ 17V
9 ~ 17V
9 ~ 17V
9 ~ 17V
9 ~ 17V
9 ~ 17V
1 ~ 30s
0 ~ 600 minutes
Equalizing charging interval
30 days 0 days 30 days
0 ~ 250D
(0 means the equalizing charging function is disabled)
Boost charging duration
120 minutes 120 minutes 120minutes 10 ~ 600 minutes
When selecting User, the battery type is to be self-customized, and in this case, the default system voltage parameters are consistent with those of the sealed lead-acid battery. When modifying battery charging and discharging parameters, the following rule must be followed:
• Over-voltage cut-off voltage > Charging limit voltage ≥ Equalizing voltage ≥ Boost voltage ≥ Floating charging voltage > Boost return voltage;
• Over-voltage cut-off voltage > Over-voltage cut-off return voltage;
• Low-voltage cut-off return voltage > Low-voltage cut-off voltage ≥ Discharging limit voltage;
• Under-voltage warning return voltage > Under-voltage warning voltage ≥ Discharging limit voltage;
• Boost return voltage > Low-voltage cut-off return voltage
17 18
6. Conversion Efficiency Curve
6.1 12V System Conversion Efficiency
MPPT 12V conversion efficiency (12V battery)
7. Product Dimensions
Output power ( W )
6.1 24V System Conversion Efficiency
MPPT 24V conversion efficiency (24V battery)
Output power ( W )
19
173
123 .
5
168
151
72
.
5
4X Φ 4
.
5
147
4X
Φ
10
GS-MPPT-ZENITH-40
Product dimensions : 238 * 173 * 72 .
5mm
Hole positions : 180 * 147mm
Hole diameter :Φ 3mm
59
.
5 131
6X
Φ
7 9 .
3
111
143 .
6
GS-MPPT-ZENITH-20
Product dimensions : 210 * 151 * 59 .
5mm
Hole positions : 154 * 131mm
Hole diameter :Φ 3mm
20
Φ .
5

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