Use and Care Manual

7. Status Information
Status Icon
Indication
Status
Description
Steady On
O
Flowing
Flash
Solar Solar
Charge Charge
IndicationIndication
Solar
Charge
Indication
Daylight Detected
No Daylight Detected
Solar Charging Battery
Solar System Over Voltage
Steady On
O
Flash
Battery Connected and
Functional
No Battery Connection
Battery Over-Discharged
Battery Battery
IndicationIndication
Battery
Indication
Flowing
O
Flash
DC Load On
DC Load O
Over-Load / Short-Circuit
DC Load DC Load
IndicationIndication
DC Load
Indication
8. Key Functionality Chart
Grape Solar
GS-PWM-20A
Charge Controller
User Manual
*GrapeSolarreservestherightstomodifythesespecificationswithoutnotice.
1.Warnings and Tools Icon Chart
Icons Name Description
High Voltage
High voltage device.
Installation should be performed by
an electrician.
High
Temperature
This device will produce heat.
Mount device away from other items.
Environmental
Hazard
Wire Cutter
Multimeter
Screwdriver
~ ~ ~
Thank you for choosing Grape Solar. This PWM solar charge controller is a
device for solar charge regulation and direct current output load control.
This device is mainly used in small sized o-grid solar power systems.
 Charging modes available for most common deep-cycle battery types
in the market, including AGM (sealed lead acid batteries), GEL, Flooded,
and Lithium mode with customizable parameters.
The Grape Solar PWM-20A charge controllers have these features:

Automatic recognition of 12V/24V battery system.
*Lithium-ion batteries excluded from this feature.

5V 1A USB outlet provides charging for mobile devices.
 Provides multiple load control mode options for light based, time
based and manually adjusted scenarios.
 Industrial grade design with reverse polarity protection for solar panels,
battery and load.
1
2
3
4
5
LCD Display Screen
5V 1A USB Port
Arrow Key
Load Key
Solar Terminals
6
7
8
9
Battery Terminals
Load Terminals
Installation Mounting Holes
Flat Mount Bracket
3. Device Diagram
8
1
2
3
5 6 7
4
9
4. Mounting Instruction
This controller can be mounted flush or flat with included bracket at a
cool, dry and weather safe location.
Flat Mount with Bracket
1. Attach the mounting bracket to the back of the controller using screws.
2. Mark the bracket’s mounting holes on the mounting surface.
3. Attach the mounting bracket to the mounting surface using screws.
Flush Mount
1. Mark the controller’s dimension and mounting holes on the mounting
surface.
2. Make necessary alterations to ensure the controller fits into the mounting
surface snugly.
Pre-install wires if needed (turn to next page for instructions).
3. Attach the controller to the mounting surface using screws.
5. Wire Connection Sequences
During installation of your PWM controller, please follow below order of
connection:
1. Connect the positive battery wire followed by the negative battery wire.
2. Make sure your solar panels are fully covered to prevent electrical shock.
Connect the positive solar array output wire followed by the negative
solar array output wire.
3. Connect the DC load wiring to the DC load output (if applicable).
Front View Back View
6. LCD Display Interface Overview
Display Section Display Layout
Charge Status
Charge Mode
&
Parameter
Active Functions
Electronic Equipment. Do not put in
landfill.
A wire cutter is needed for cutting and
stripping wires prior to connection.
Anti-static
Glove
Electrical Tape
A multimeter is needed for testing
equipment and verifying polarity of
cables.
Anti-static gloves are recommended
to prevent controller damage caused
by static electricity.
Electrical tape is recommended to
safely insulate spliced or bare wires.
A common size screwdriver is needed
when attaching wires to the controller.
#
Description
#
Description
Function Key
System
Mode
Input
Input Function
Long Press
Short Press
Long Press
Short Press
Long Press
Short Press
Long Press
Short Press
Enter SET mode
View Next Page
N/A
Switch Load On/O
(Manual Control Program Only)
Save Data & Exit SET Mode
View Next Page
N/A
Adjust parameter
View Mode
View Mode
Set Mode
Set Mode
2. Product Features