Grape Solar GS-PWM-20A User manual

Grape Solar
GS-PWM-20A
Charge Controller
User Manual
*Grape Solar reserves therights tomodify these spe ifi ations without
noti e.
1. Warnings and Tools Icon Chart

2. Product Features
Icons Name Description
High Voltage
High voltage devi e. Installation should be
performed by an ele tri ian.
High Temperature This devi e wiLL produ e heat.
Mount devi e away from other items.
En ironmental Hazard Ele troni Equipment. Do not put in LandfiLL
Wire Cutter A wire utter is needed for utting and
stripping wires prior to onne tion.
Multimeter A multimeter is needed for testing
equipment and verifying polarity of ables.
Anti-static Glo e
Anti-stati gloves are re ommended to
prevent ontroller damage aused by stati
ele tri ity.
Electrical Tape Ele tri al tape is re ommended to safely
insulate spli ed or bare wires.
Screwdri er A ommon size s rewdriver is needed when
atta hing wires to the ontroller.

Thank you for hoosing Grape Solar. This PWM solar harge ontroller is a devi e for
solar harge regulation and dire t urrent output Load ontrol. This devi e is mainly
used in small sized off-grid solar power systems.
The Grape Solar PWM-20A harge ontrollers have these features ：
・ Charging modes available for most ommon deep - y le battery types in the
market, in luding AGM (sealed lead a id batteries), GEL, Flooded, and Lithium
mode with ustomizable parameters.
・ Automati re ognition of 12V/^4V battery system.
*Lithium-ion batteries ex luded from this feature.
・ 5V1A USB outlet provides harging for mobile devi es.
・ Provides multiple load ontrol mode options for light based, time based and
manually adjusted s enarios.
・ Industrial grade design with reverse polarity prote tion for solar panels, battery
and Load.
3. De ice Diagram
# Description
1 LCD Display S reen
2 5V1A USB Port
3 Arrow Key
4 Load Key
5 Solar Terminals
6 Battery Terminals
7 Load Terminals
8 Installation Mounting Holes
9 Flat Mount Bra ket
4. Mounting Instruction
This ontroller an be mounted flush or flat with in luded bra ket at a ool dry and

weather safe lo ation.
1. Atta h the mounting bra ket to the ba k of the ontroller using s rews.
2. Mark the bra kets mounting holes on the mounting surfe e.
3. Atta h the mounting bra ket to the mounting surfa e using s rews.
1. Mark the ontroller's dimension and mounting holes on the mounting surfa e.
2. Make ne essary alterations to ensure the ontroller fits into the mounting surfa e
snugly.
Pre-install wires if needed (turn to next page for instru tions).
3. Atta h the ontroller to the mounting surfa e using s rews.
5.Wire Connection Sequences

During installation of your PWM controller, please follow below order of
connection ：
：：
：
l.Conne t the positive battery wire followed by the negative battery wire.
2.Make sure your solar panels are fully overed to prevent ele tri al sho k. Conne t
the positive solar i array output wire followed by the negative solar array output
wire.
3.Conne t the DC Load wiring to the DC Load output (if appli able).
6. LCD Display Interface O er iew
7. Status Inform

Status Icon Indication Status Description
Solar
Steady On Daylight Dete ted
Off No Daylight Dete ted
Flowing Solar Charging Battery
Flash Solar Input System Over Voltage
Battery
Steady On Battery Conne ted and Fun tional
Off No Battery Conne tion
Slow Flash Battery Over-Dis harged
Slow Flash Battery Over-Voltage
DC Load
Flowing DC Load On
Off DC Load Off
Flash Over-Load /Short-Cir uit
8. Key Functionality Chart
Function Key
System
Mode Input Input Function
View Mode
Long Press Enter SET mode
Short Press View Next Page
View Mode
Long Press N/A
Short Press Swit h Load On/Off
(Manual Control Program Only)
Set Mode
Long Press Save Data & Exit SET Mode
Short Press View Next Page
Set Mode
Long Press N/A
Short Press Adjust parameter
9. LCD Display Rules & Cycles
Pre start-up display y le when the MPPT ontroller turns on, this usually last several

se onds while ontroller dete ts operating environment.
LCD Screen Display Cycle
· The battery voltage view will be displayed by default. Use the up and down arrow
keys to y le through different views.
· The battery voltage view will resume upon 12 se onds of ina tivity.
· The Error Code view will be displayed automati ally if there is any ontroller error
o urs.
Setting Battery Mode
Abbre iations Battery Types Description
FLD Flooded Battery Auto-
re ognition with default parameters

SEL Sealed/AGM Battery set for ea h type of
Batteries.
GEL Gel Battery
LI Lithium Battery Customize harge & dis harge voltages.
Ad ance Battery Settings
· In Lithium mode, short press the arrow key again to y le through ea h parameter
view.
· Use the load key to adjust parameter value, then Long press arrow key to save and
exit.
Load Mode Settings
· Enter Load SET Mode by pressing the arrow key in Load Mode view only.
· Short press the arrow key to y le through load modes before Long pressing the
arrow key again to save and exit.
Mode Definition Description

0 Daylight AutoControl The PV voltage turns on the load when it is light
1~14 Daylight On /Timer Off
DC Load turns on when daylight is dete ted.
DC Load turns off a ording to timer.
Mode 1 = turn off after 1 hour, et .
15 Manual Mode DC Load turns on/off by pressing the Load key.
16 Testing Mode DC Load turns on and off in a qui k su ession.
17 Always on DC Load Stays On
10. Error Code

Code Error Description & Quick Troubleshoo
E00 No error No a tion needed.
E01 Battery Over--
dis harged
Battery voltage is too low.
DC Load will be turned off until battery re-harges to re overy
voltage
E02 Battery
Over-voltage
Battery voltage has ex eeded ontroller Limit.
Che k battery bank voltage for ompatibility with ontroller.
E04 Load Short
Cir uit DC Load short ir uit.
E05 Load Overload DC Load power draw ex eeds ontroller apability.
Redu e load size or upgrade to a higher load apa ity ontroller.
E06 Overheating Controller ex eeds operating temperature limit.
Ensure the ontroller is pla ed in a well-ventilated ool, dry pla e.
E08 Solar Over
--amperage
Solar array amperage ex eeds ontroller rated input amperage.
De rease the amperage of solar panels onne ted to the ontroller
or upgrade to a higher rated ontroller.
E10 Solar Over-voltage
Solar array voltage ex eeds ontroller rated input voltage.
De rease the voltage of solar panels onne ted to the ontroller.
E13 Solar Reverse
Polarity
Solar array input wires onne ted with reverse polarity.
Dis onne t and re- onne t with orre t wire polarity.
E14 Battery Reverse
Polarity
Battery onne tion wires onne ted with reverse polarity.
Dis onne t and re- onne t with orre t wire polarity.
*Conta t Grape Solar for Live te hni al support on additional troubleshooting.
11. Controller Specification
The variable “n" is adopted as a multiplying fa tor when al ulating parameter
voltages, the rule for “n" is listed as: if battery system voltage is 12V, n=l; 24V, n=2.