Grape Solar GS-PWM-20A User 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

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

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

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

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

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

power up BAT Voltage PV Voltage Charge I Load I
Error Load Mode BAT ℃BAT SOC
12.Product Dimensions
Product Dimension:
130*90*34.6 mm / 5.11*3.54*1.36 inch
Flat Mount Size: 124 mm / 4.88 inch
Flush Mount Size: 130 mm / 5.11 inch
Installation Hole Size:
φ3.5 mm / φ0.13 inch
90mm/3.5 4inch
130mm /5.11inch
21.1m m/0.83i nch
34.6m m/1.36i nch
124mm/4.88inch
77.4m m/3. 04i nch
112.3 9mm/ 4.4 2inc h
2*φ3.5m m/2*φ0.13 inch
90mm/ 3.5inch
2*φ3.5m m/2*φ0.13 inch
3,5mm /0.13in ch
130mm /5.11in ch
146mm /5.74in ch
15mm/ 0.59inc h
18mm/ 0.7inch
15mm/ 0.59inc h
8mm /0 .3 1in ch
119mm /4.68in ch
18mm/ 0.7inch
9. 9LCD Display Rules & Cycles
Pre start-up display cycle when the MPPT controller turns on, this usually
last several seconds while controller detects operating environment.
LCD Screen Display Cycle
The battery voltage view will be displayed by default. Use the up and
down arrow keys to cycle through dierent views. The battery voltage
view will resume upon 12 seconds of inactivity.
Setting Battery Mode
Abbreviations Battery Types Description
FLD Flooded Battery Auto-recognition with default
parameters set for each type
of batteries.
SEL Sealed/AGM Battery
GEL Gel Battery
LI Lithium Battery Customize charge & discharge
voltages.
Advance Battery Settings
In Lithium mode, short press the arrow key again to cycle through each
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 cycle through load modes before long pressing
the arrow key again to save and exit.
Mode Definition Description
0
1~14
15
16
17
Daylight Auto-Control
Daylight On/Timer O
Manual Mode
Testing Mode
Always on
The PV voltage turns on the load when it
is light
DC load turns on when daylight is detected.
DC load turns o according to timer.
Mode 1 = turn o after 1 hour, etc.
DC load turns on/o by pressing the load
key.
DC load turns on and o in a quick
succession.
DC Load Stays On
Code Error Description & Quick Troubleshoot
E00 No action needed.
E01
E02
E04
E05
E06
E08
E10
E13
E14
*Contact Grape Solar for live technical support on additional
troubleshooting.
11. Controller Specification
The variable “n” is adopted as a multiplying factor when calculating
parameter voltages, the rule for “n” is listed as: if battery system voltage
is 12V, n=1; 24V, n=2.
For example, the equalize charge voltage for a 12V FLD (Flooded) battery
bank is 14.8V*1=14.8V.
The equalizing charge voltage for a 24V FLD (Flooded) battery bank is
14.8V*2=29.6V.
Parameter Value
Model No. GS-PWM-20A
Battery System Voltage
12V/24V
Auto (FLD/GEL/SLD)
Manual (Li)
No-load Loss
Max Solar Input Voltage
Rated Solar Charge Current
Max Solar Input Power
Light Control Voltage
Light Control Delay Time
Max Load Output Current
Operating Temperature
IP Protection
Net Weight
Operating Altitude
Controller Dimension
8ma (12V), 12ma (24V)
<55V
20A
340W/12V
680W/24V
5V*n
10s
20A
-35ºC ~ +45ºC / -31ºF ~ +113ºF
IP32
0.25 kg / 0.55 lbs
≤ 3000 meters / ≤ 9842 feet
130*90*34.6 mm / 5.11*3.54*1.36 inch
Parameter Battery Parameters
Battery Types
Equalize Charge Voltage
Boost Charge Voltage
Float Charge Voltage
Boost Charge Recovery Voltage
Over-discharge Recovery Voltage
Over-discharge Voltage
FLD
14.8V*n
14.6V*n
SEL
14.6V*n
14.4V*n
GEL
--
14.2V*n
LI
--
14.4V*n (adjustable)
13.8V*n
13.2V*n
12.6V*n
11.1V*n
--
12.6V*n(adjustable)
11.1V*n(adjustable)
--
--
10. Error Code Chart
No error
Battery
Over-
discharged
Battery
Over-voltage
Load Short
Circuit
Load
Overload
Overheating
Solar
Over
-amperage
Solar
Over-voltage
Solar
Reverse
Polarity
Battery
Reverse
Polarity
Battery voltage is too low.
DC load will be turned o until battery
re-charges to recovery voltage.
Battery voltage has exceeded controller
limit.
Check battery bank voltage for
compatibility with controller.
DC load short circuit.
DC load power draw exceeds controller
capability.
Reduce load size or upgrade to a higher
load capacity controller.
Controller exceeds operating temperature
limit.
Ensure the controller is placed in a well
-ventilated cool, dry place.
Solar array amperage exceeds controller
rated input amperage.
Decrease the amperage of solar panels
connected to the controller or upgrade to
a higher rated controller.
Solar array voltage exceeds controller
rated input voltage.
Decrease the voltage of solar panels
connected to the controller.
Solar array input wires connected with
reverse polarity.
Disconnect and re-connect with correct
wire polarity.
Battery connection wires connected with
reverse polarity.
Disconnect and re-connect with correct
wire polarity.
SET
Load Mode Load Mode
Long [SET] or
12second no
operation
Long [SET]
SET
BAT Type
SET
System Voltage
SET
Over discharge Voltage
SET
Charge Voltage

power up BAT Voltage PV Voltage Charge I Load I
Error Load Mode BAT ℃BAT SOC
12.Product Dimensions
Product Dimension:
130*90*34.6 mm / 5.11*3.54*1.36 inch
Flat Mount Size: 124 mm / 4.88 inch
Flush Mount Size: 130 mm / 5.11 inch
Installation Hole Size:
φ3.5 mm / φ0.13 inch
90mm/3.5 4inch
130mm /5.11inch
21.1m m/0.83i nch
34.6m m/1.36i nch
124mm/4.88inch
77.4m m/3.04i nch
112.3 9mm/4.4 2inch
2*φ3.5m m/2*φ0.13 inch
90mm/ 3.5inch
2*φ3.5m m/2*φ0.13 inch
3,5mm /0.13in ch
130mm /5.11in ch
146mm /5.74in ch
15mm/ 0.59inc h
18mm/ 0.7inch
15mm/ 0.59inc h
8mm /0 .3 1in ch
119mm /4.68in ch
18mm/ 0.7inch
9. 9LCD Display Rules & Cycles
Pre start-up display cycle when the MPPT controller turns on, this usually
last several seconds while controller detects operating environment.
LCD Screen Display Cycle
The battery voltage view will be displayed by default. Use the up and
down arrow keys to cycle through dierent views. The battery voltage
view will resume upon 12 seconds of inactivity.
Setting Battery Mode
Abbreviations Battery Types Description
FLD Flooded Battery Auto-recognition with default
parameters set for each type
of batteries.
SEL Sealed/AGM Battery
GEL Gel Battery
LI Lithium Battery Customize charge & discharge
voltages.
Advance Battery Settings
In Lithium mode, short press the arrow key again to cycle through each
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 cycle through load modes before long pressing
the arrow key again to save and exit.
Mode Definition Description
0
1~14
15
16
17
Daylight Auto-Control
Daylight On/Timer O
Manual Mode
Testing Mode
Always on
The PV voltage turns on the load when it
is light
DC load turns on when daylight is detected.
DC load turns o according to timer.
Mode 1 = turn o after 1 hour, etc.
DC load turns on/o by pressing the load
key.
DC load turns on and o in a quick
succession.
DC Load Stays On
Code Error Description & Quick Troubleshoot
E00 No action needed.
E01
E02
E04
E05
E06
E08
E10
E13
E14
*Contact Grape Solar for live technical support on additional
troubleshooting.
11. Controller Specification
The variable “n” is adopted as a multiplying factor when calculating
parameter voltages, the rule for “n” is listed as: if battery system voltage
is 12V, n=1; 24V, n=2.
For example, the equalize charge voltage for a 12V FLD (Flooded) battery
bank is 14.8V*1=14.8V.
The equalizing charge voltage for a 24V FLD (Flooded) battery bank is
14.8V*2=29.6V.
Parameter Value
Model No. GS-PWM-20A
Battery System Voltage
12V/24V
Auto (FLD/GEL/SLD)
Manual (Li)
No-load Loss
Max Solar Input Voltage
Rated Solar Charge Current
Max Solar Input Power
Light Control Voltage
Light Control Delay Time
Max Load Output Current
Operating Temperature
IP Protection
Net Weight
Operating Altitude
Controller Dimension
8ma (12V), 12ma (24V)
<55V
20A
340W/12V
680W/24V
5V*n
10s
20A
-35ºC ~ +45ºC / -31ºF ~ +113ºF
IP32
0.25 kg / 0.55 lbs
≤ 3000 meters / ≤ 9842 feet
130*90*34.6 mm / 5.11*3.54*1.36 inch
Parameter Battery Parameters
Battery Types
Equalize Charge Voltage
Boost Charge Voltage
Float Charge Voltage
Boost Charge Recovery Voltage
Over-discharge Recovery Voltage
Over-discharge Voltage
FLD
14.8V*n
14.6V*n
SEL
14.6V*n
14.4V*n
GEL
--
14.2V*n
LI
--
14.4V*n (adjustable)
13.8V*n
13.2V*n
12.6V*n
11.1V*n
--
12.6V*n(adjustable)
11.1V*n(adjustable)
--
--
10. Error Code Chart
No error
Battery
Over-
discharged
Battery
Over-voltage
Load Short
Circuit
Load
Overload
Overheating
Solar
Over
-amperage
Solar
Over-voltage
Solar
Reverse
Polarity
Battery
Reverse
Polarity
Battery voltage is too low.
DC load will be turned o until battery
re-charges to recovery voltage.
Battery voltage has exceeded controller
limit.
Check battery bank voltage for
compatibility with controller.
DC load short circuit.
DC load power draw exceeds controller
capability.
Reduce load size or upgrade to a higher
load capacity controller.
Controller exceeds operating temperature
limit.
Ensure the controller is placed in a well
-ventilated cool, dry place.
Solar array amperage exceeds controller
rated input amperage.
Decrease the amperage of solar panels
connected to the controller or upgrade to
a higher rated controller.
Solar array voltage exceeds controller
rated input voltage.
Decrease the voltage of solar panels
connected to the controller.
Solar array input wires connected with
reverse polarity.
Disconnect and re-connect with correct
wire polarity.
Battery connection wires connected with
reverse polarity.
Disconnect and re-connect with correct
wire polarity.
SET
Load Mode Load Mode
Long [SET] or
12second no
operation
Long [SET]
SET
BAT Type
SET
System Voltage
SET
Over discharge Voltage
SET
Charge Voltage

power up BAT Voltage PV Voltage Charge I Load I
Error Load Mode BAT ℃BAT SOC
12.Product Dimensions
Product Dimension:
130*90*34.6 mm / 5.11*3.54*1.36 inch
Flat Mount Size: 124 mm / 4.88 inch
Flush Mount Size: 130 mm / 5.11 inch
Installation Hole Size:
φ3.5 mm / φ0.13 inch
90mm/3.5 4inch
130mm /5.11inch
21.1m m/0.83i nch
34.6m m/1.36i nch
124mm/4.88inch
77.4m m/3.04i nch
112.3 9mm/4.4 2inc h
2*φ3.5m m/2*φ0.13 inch
90mm/ 3.5inch
2*φ3.5m m/2*φ0.13 inch
3,5mm /0.13in ch
130mm /5.11in ch
146mm /5.74in ch
15mm/ 0.59inc h
18mm/ 0.7inch
15mm/ 0.59inc h
8mm /0 .3 1in ch
119mm /4.68in ch
18mm/ 0.7inch
9. 9LCD Display Rules & Cycles
Pre start-up display cycle when the MPPT controller turns on, this usually
last several seconds while controller detects operating environment.
LCD Screen Display Cycle
The battery voltage view will be displayed by default. Use the up and
down arrow keys to cycle through dierent views. The battery voltage
view will resume upon 12 seconds of inactivity.
Setting Battery Mode
Abbreviations Battery Types Description
FLD Flooded Battery Auto-recognition with default
parameters set for each type
of batteries.
SEL Sealed/AGM Battery
GEL Gel Battery
LI Lithium Battery Customize charge & discharge
voltages.
Advance Battery Settings
In Lithium mode, short press the arrow key again to cycle through each
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 cycle through load modes before long pressing
the arrow key again to save and exit.
Mode Definition Description
0
1~14
15
16
17
Daylight Auto-Control
Daylight On/Timer O
Manual Mode
Testing Mode
Always on
The PV voltage turns on the load when it
is light
DC load turns on when daylight is detected.
DC load turns o according to timer.
Mode 1 = turn o after 1 hour, etc.
DC load turns on/o by pressing the load
key.
DC load turns on and o in a quick
succession.
DC Load Stays On
Code Error Description & Quick Troubleshoot
E00 No action needed.
E01
E02
E04
E05
E06
E08
E10
E13
E14
*Contact Grape Solar for live technical support on additional
troubleshooting.
11. Controller Specification
The variable “n” is adopted as a multiplying factor when calculating
parameter voltages, the rule for “n” is listed as: if battery system voltage
is 12V, n=1; 24V, n=2.
For example, the equalize charge voltage for a 12V FLD (Flooded) battery
bank is 14.8V*1=14.8V.
The equalizing charge voltage for a 24V FLD (Flooded) battery bank is
14.8V*2=29.6V.
Parameter Value
Model No. GS-PWM-20A
Battery System Voltage
12V/24V
Auto (FLD/GEL/SLD)
Manual (Li)
No-load Loss
Max Solar Input Voltage
Rated Solar Charge Current
Max Solar Input Power
Light Control Voltage
Light Control Delay Time
Max Load Output Current
Operating Temperature
IP Protection
Net Weight
Operating Altitude
Controller Dimension
8ma (12V), 12ma (24V)
<55V
20A
340W/12V
680W/24V
5V*n
10s
20A
-35ºC ~ +45ºC / -31ºF ~ +113ºF
IP32
0.25 kg / 0.55 lbs
≤ 3000 meters / ≤ 9842 feet
130*90*34.6 mm / 5.11*3.54*1.36 inch
Parameter Battery Parameters
Battery Types
Equalize Charge Voltage
Boost Charge Voltage
Float Charge Voltage
Boost Charge Recovery Voltage
Over-discharge Recovery Voltage
Over-discharge Voltage
FLD
14.8V*n
14.6V*n
SEL
14.6V*n
14.4V*n
GEL
--
14.2V*n
LI
--
14.4V*n (adjustable)
13.8V*n
13.2V*n
12.6V*n
11.1V*n
--
12.6V*n(adjustable)
11.1V*n(adjustable)
--
--
10. Error Code Chart
No error
Battery
Over-
discharged
Battery
Over-voltage
Load Short
Circuit
Load
Overload
Overheating
Solar
Over
-amperage
Solar
Over-voltage
Solar
Reverse
Polarity
Battery
Reverse
Polarity
Battery voltage is too low.
DC load will be turned o until battery
re-charges to recovery voltage.
Battery voltage has exceeded controller
limit.
Check battery bank voltage for
compatibility with controller.
DC load short circuit.
DC load power draw exceeds controller
capability.
Reduce load size or upgrade to a higher
load capacity controller.
Controller exceeds operating temperature
limit.
Ensure the controller is placed in a well
-ventilated cool, dry place.
Solar array amperage exceeds controller
rated input amperage.
Decrease the amperage of solar panels
connected to the controller or upgrade to
a higher rated controller.
Solar array voltage exceeds controller
rated input voltage.
Decrease the voltage of solar panels
connected to the controller.
Solar array input wires connected with
reverse polarity.
Disconnect and re-connect with correct
wire polarity.
Battery connection wires connected with
reverse polarity.
Disconnect and re-connect with correct
wire polarity.
SET
Load Mode Load Mode
Long [SET] or
12second no
operation
Long [SET]
SET
BAT Type
SET
System Voltage
SET
Over discharge Voltage
SET
Charge Voltage

power up BAT Voltage PV Voltage Charge I Load I
Error Load Mode BAT ℃BAT SOC
12.Product Dimensions
Product Dimension:
130*90*34.6 mm / 5.11*3.54*1.36 inch
Flat Mount Size: 124 mm / 4.88 inch
Flush Mount Size: 130 mm / 5.11 inch
Installation Hole Size:
φ3.5 mm / φ0.13 inch
90mm/3.5 4inch
130mm /5.11inch
21.1m m/0.83i nch
34.6m m/1.36i nch
124mm/4.88inch
77.4m m/3. 04i nch
112.3 9mm/ 4.4 2inc h
2*φ3.5m m/2*φ0.13 inch
90mm/ 3.5inch
2*φ3.5m m/2*φ0.13 inch
3,5mm /0.13in ch
130mm /5.11in ch
146mm /5.74in ch
15mm/ 0.59inc h
18mm/ 0.7inch
15mm/ 0.59inc h
8mm /0 .3 1in ch
119mm /4.68in ch
18mm/ 0.7inch
9. 9LCD Display Rules & Cycles
Pre start-up display cycle when the MPPT controller turns on, this usually
last several seconds while controller detects operating environment.
LCD Screen Display Cycle
The battery voltage view will be displayed by default. Use the up and
down arrow keys to cycle through dierent views. The battery voltage
view will resume upon 12 seconds of inactivity.
Setting Battery Mode
Abbreviations Battery Types Description
FLD Flooded Battery Auto-recognition with default
parameters set for each type
of batteries.
SEL Sealed/AGM Battery
GEL Gel Battery
LI Lithium Battery Customize charge & discharge
voltages.
Advance Battery Settings
In Lithium mode, short press the arrow key again to cycle through each
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 cycle through load modes before long pressing
the arrow key again to save and exit.
Mode Definition Description
0
1~14
15
16
17
Daylight Auto-Control
Daylight On/Timer O
Manual Mode
Testing Mode
Always on
The PV voltage turns on the load when it
is light
DC load turns on when daylight is detected.
DC load turns o according to timer.
Mode 1 = turn o after 1 hour, etc.
DC load turns on/o by pressing the load
key.
DC load turns on and o in a quick
succession.
DC Load Stays On
Code Error Description & Quick Troubleshoot
E00 No action needed.
E01
E02
E04
E05
E06
E08
E10
E13
E14
*Contact Grape Solar for live technical support on additional
troubleshooting.
11. Controller Specification
The variable “n” is adopted as a multiplying factor when calculating
parameter voltages, the rule for “n” is listed as: if battery system voltage
is 12V, n=1; 24V, n=2.
For example, the equalize charge voltage for a 12V FLD (Flooded) battery
bank is 14.8V*1=14.8V.
The equalizing charge voltage for a 24V FLD (Flooded) battery bank is
14.8V*2=29.6V.
Parameter Value
Model No. GS-PWM-20A
Battery System Voltage
12V/24V
Auto (FLD/GEL/SLD)
Manual (Li)
No-load Loss
Max Solar Input Voltage
Rated Solar Charge Current
Max Solar Input Power
Light Control Voltage
Light Control Delay Time
Max Load Output Current
Operating Temperature
IP Protection
Net Weight
Operating Altitude
Controller Dimension
8ma (12V), 12ma (24V)
<55V
20A
340W/12V
680W/24V
5V*n
10s
20A
-35ºC ~ +45ºC / -31ºF ~ +113ºF
IP32
0.25 kg / 0.55 lbs
≤ 3000 meters / ≤ 9842 feet
130*90*34.6 mm / 5.11*3.54*1.36 inch
Parameter Battery Parameters
Battery Types
Equalize Charge Voltage
Boost Charge Voltage
Float Charge Voltage
Boost Charge Recovery Voltage
Over-discharge Recovery Voltage
Over-discharge Voltage
FLD
14.8V*n
14.6V*n
SEL
14.6V*n
14.4V*n
GEL
--
14.2V*n
LI
--
14.4V*n (adjustable)
13.8V*n
13.2V*n
12.6V*n
11.1V*n
--
12.6V*n(adjustable)
11.1V*n(adjustable)
--
--
10. Error Code Chart
No error
Battery
Over-
discharged
Battery
Over-voltage
Load Short
Circuit
Load
Overload
Overheating
Solar
Over
-amperage
Solar
Over-voltage
Solar
Reverse
Polarity
Battery
Reverse
Polarity
Battery voltage is too low.
DC load will be turned o until battery
re-charges to recovery voltage.
Battery voltage has exceeded controller
limit.
Check battery bank voltage for
compatibility with controller.
DC load short circuit.
DC load power draw exceeds controller
capability.
Reduce load size or upgrade to a higher
load capacity controller.
Controller exceeds operating temperature
limit.
Ensure the controller is placed in a well
-ventilated cool, dry place.
Solar array amperage exceeds controller
rated input amperage.
Decrease the amperage of solar panels
connected to the controller or upgrade to
a higher rated controller.
Solar array voltage exceeds controller
rated input voltage.
Decrease the voltage of solar panels
connected to the controller.
Solar array input wires connected with
reverse polarity.
Disconnect and re-connect with correct
wire polarity.
Battery connection wires connected with
reverse polarity.
Disconnect and re-connect with correct
wire polarity.
SET
Load Mode Load Mode
Long [SET] or
12second no
operation
Long [SET]
SET
BAT Type
SET
System Voltage
SET
Over discharge Voltage
SET
Charge Voltage

power up BAT Voltage PV Voltage Charge I Load I
Error Load Mode BAT ℃BAT SOC
12.Product Dimensions
Product Dimension:
130*90*34.6 mm / 5.11*3.54*1.36 inch
Flat Mount Size: 124 mm / 4.88 inch
Flush Mount Size: 130 mm / 5.11 inch
Installation Hole Size:
φ3.5 mm / φ0.13 inch
90mm/3.5 4inch
130mm /5.11inch
21.1m m/0.83i nch
34.6m m/1.36i nch
124mm/4.88inch
77.4m m/3.04i nch
112.3 9mm/4.4 2inch
2*φ3.5m m/2*φ0.13 inch
90mm/ 3.5inch
2*φ3.5m m/2*φ0.13 inch
3,5mm /0.13in ch
130mm /5.11in ch
146mm /5.74in ch
15mm/ 0.59inc h
18mm/ 0.7inch
15mm/ 0.59inc h
8mm /0 .3 1in ch
119mm /4.68in ch
18mm/ 0.7inch
9. 9LCD Display Rules & Cycles
Pre start-up display cycle when the MPPT controller turns on, this usually
last several seconds while controller detects operating environment.
LCD Screen Display Cycle
The battery voltage view will be displayed by default. Use the up and
down arrow keys to cycle through dierent views. The battery voltage
view will resume upon 12 seconds of inactivity.
Setting Battery Mode
Abbreviations Battery Types Description
FLD Flooded Battery Auto-recognition with default
parameters set for each type
of batteries.
SEL Sealed/AGM Battery
GEL Gel Battery
LI Lithium Battery Customize charge & discharge
voltages.
Advance Battery Settings
In Lithium mode, short press the arrow key again to cycle through each
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 cycle through load modes before long pressing
the arrow key again to save and exit.
Mode Definition Description
0
1~14
15
16
17
Daylight Auto-Control
Daylight On/Timer O
Manual Mode
Testing Mode
Always on
The PV voltage turns on the load when it
is light
DC load turns on when daylight is detected.
DC load turns o according to timer.
Mode 1 = turn o after 1 hour, etc.
DC load turns on/o by pressing the load
key.
DC load turns on and o in a quick
succession.
DC Load Stays On
Code Error Description & Quick Troubleshoot
E00 No action needed.
E01
E02
E04
E05
E06
E08
E10
E13
E14
*Contact Grape Solar for live technical support on additional
troubleshooting.
11. Controller Specification
The variable “n” is adopted as a multiplying factor when calculating
parameter voltages, the rule for “n” is listed as: if battery system voltage
is 12V, n=1; 24V, n=2.
For example, the equalize charge voltage for a 12V FLD (Flooded) battery
bank is 14.8V*1=14.8V.
The equalizing charge voltage for a 24V FLD (Flooded) battery bank is
14.8V*2=29.6V.
Parameter Value
Model No. GS-PWM-20A
Battery System Voltage
12V/24V
Auto (FLD/GEL/SLD)
Manual (Li)
No-load Loss
Max Solar Input Voltage
Rated Solar Charge Current
Max Solar Input Power
Light Control Voltage
Light Control Delay Time
Max Load Output Current
Operating Temperature
IP Protection
Net Weight
Operating Altitude
Controller Dimension
8ma (12V), 12ma (24V)
<55V
20A
340W/12V
680W/24V
5V*n
10s
20A
-35ºC ~ +45ºC / -31ºF ~ +113ºF
IP32
0.25 kg / 0.55 lbs
≤ 3000 meters / ≤ 9842 feet
130*90*34.6 mm / 5.11*3.54*1.36 inch
Parameter Battery Parameters
Battery Types
Equalize Charge Voltage
Boost Charge Voltage
Float Charge Voltage
Boost Charge Recovery Voltage
Over-discharge Recovery Voltage
Over-discharge Voltage
FLD
14.8V*n
14.6V*n
SEL
14.6V*n
14.4V*n
GEL
--
14.2V*n
LI
--
14.4V*n (adjustable)
13.8V*n
13.2V*n
12.6V*n
11.1V*n
--
12.6V*n(adjustable)
11.1V*n(adjustable)
--
--
10. Error Code Chart
No error
Battery
Over-
discharged
Battery
Over-voltage
Load Short
Circuit
Load
Overload
Overheating
Solar
Over
-amperage
Solar
Over-voltage
Solar
Reverse
Polarity
Battery
Reverse
Polarity
Battery voltage is too low.
DC load will be turned o until battery
re-charges to recovery voltage.
Battery voltage has exceeded controller
limit.
Check battery bank voltage for
compatibility with controller.
DC load short circuit.
DC load power draw exceeds controller
capability.
Reduce load size or upgrade to a higher
load capacity controller.
Controller exceeds operating temperature
limit.
Ensure the controller is placed in a well
-ventilated cool, dry place.
Solar array amperage exceeds controller
rated input amperage.
Decrease the amperage of solar panels
connected to the controller or upgrade to
a higher rated controller.
Solar array voltage exceeds controller
rated input voltage.
Decrease the voltage of solar panels
connected to the controller.
Solar array input wires connected with
reverse polarity.
Disconnect and re-connect with correct
wire polarity.
Battery connection wires connected with
reverse polarity.
Disconnect and re-connect with correct
wire polarity.
SET
Load Mode Load Mode
Long [SET] or
12second no
operation
Long [SET]
SET
BAT Type
SET
System Voltage
SET
Over discharge Voltage
SET
Charge Voltage

power up BAT Voltage PV Voltage Charge I Load I
Error Load Mode BAT ℃BAT SOC
12.Product Dimensions
Product Dimension:
130*90*34.6 mm / 5.11*3.54*1.36 inch
Flat Mount Size: 124 mm / 4.88 inch
Flush Mount Size: 130 mm / 5.11 inch
Installation Hole Size:
φ3.5 mm / φ0.13 inch
90mm/3.5 4inch
130mm /5.11inch
21.1m m/0.83i nch
34.6m m/1.36i nch
124mm/4.88inch
77.4m m/3. 04i nch
112.3 9mm/ 4.4 2inc h
2*φ3.5m m/2*φ0.13 inch
90mm/ 3.5inch
2*φ3.5m m/2*φ0.13 inch
3,5mm /0.13in ch
130mm /5.11in ch
146mm /5.74in ch
15mm/ 0.59inc h
18mm/ 0.7inch
15mm/ 0.59inc h
8mm /0 .3 1in ch
119mm /4.68in ch
18mm/ 0.7inch
9. 9LCD Display Rules & Cycles
Pre start-up display cycle when the MPPT controller turns on, this usually
last several seconds while controller detects operating environment.
LCD Screen Display Cycle
The battery voltage view will be displayed by default. Use the up and
down arrow keys to cycle through dierent views. The battery voltage
view will resume upon 12 seconds of inactivity.
Setting Battery Mode
Abbreviations Battery Types Description
FLD Flooded Battery Auto-recognition with default
parameters set for each type
of batteries.
SEL Sealed/AGM Battery
GEL Gel Battery
LI Lithium Battery Customize charge & discharge
voltages.
Advance Battery Settings
In Lithium mode, short press the arrow key again to cycle through each
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 cycle through load modes before long pressing
the arrow key again to save and exit.
Mode Definition Description
0
1~14
15
16
17
Daylight Auto-Control
Daylight On/Timer O
Manual Mode
Testing Mode
Always on
The PV voltage turns on the load when it
is light
DC load turns on when daylight is detected.
DC load turns o according to timer.
Mode 1 = turn o after 1 hour, etc.
DC load turns on/o by pressing the load
key.
DC load turns on and o in a quick
succession.
DC Load Stays On
Code Error Description & Quick Troubleshoot
E00 No action needed.
E01
E02
E04
E05
E06
E08
E10
E13
E14
*Contact Grape Solar for live technical support on additional
troubleshooting.
11. Controller Specification
The variable “n” is adopted as a multiplying factor when calculating
parameter voltages, the rule for “n” is listed as: if battery system voltage
is 12V, n=1; 24V, n=2.
For example, the equalize charge voltage for a 12V FLD (Flooded) battery
bank is 14.8V*1=14.8V.
The equalizing charge voltage for a 24V FLD (Flooded) battery bank is
14.8V*2=29.6V.
Parameter Value
Model No. GS-PWM-20A
Battery System Voltage
12V/24V
Auto (FLD/GEL/SLD)
Manual (Li)
No-load Loss
Max Solar Input Voltage
Rated Solar Charge Current
Max Solar Input Power
Light Control Voltage
Light Control Delay Time
Max Load Output Current
Operating Temperature
IP Protection
Net Weight
Operating Altitude
Controller Dimension
8ma (12V), 12ma (24V)
<55V
20A
340W/12V
680W/24V
5V*n
10s
20A
-35ºC ~ +45ºC / -31ºF ~ +113ºF
IP32
0.25 kg / 0.55 lbs
≤ 3000 meters / ≤ 9842 feet
130*90*34.6 mm / 5.11*3.54*1.36 inch
Parameter Battery Parameters
Battery Types
Equalize Charge Voltage
Boost Charge Voltage
Float Charge Voltage
Boost Charge Recovery Voltage
Over-discharge Recovery Voltage
Over-discharge Voltage
FLD
14.8V*n
14.6V*n
SEL
14.6V*n
14.4V*n
GEL
--
14.2V*n
LI
--
14.4V*n (adjustable)
13.8V*n
13.2V*n
12.6V*n
11.1V*n
--
12.6V*n(adjustable)
11.1V*n(adjustable)
--
--
10. Error Code Chart
No error
Battery
Over-
discharged
Battery
Over-voltage
Load Short
Circuit
Load
Overload
Overheating
Solar
Over
-amperage
Solar
Over-voltage
Solar
Reverse
Polarity
Battery
Reverse
Polarity
Battery voltage is too low.
DC load will be turned o until battery
re-charges to recovery voltage.
Battery voltage has exceeded controller
limit.
Check battery bank voltage for
compatibility with controller.
DC load short circuit.
DC load power draw exceeds controller
capability.
Reduce load size or upgrade to a higher
load capacity controller.
Controller exceeds operating temperature
limit.
Ensure the controller is placed in a well
-ventilated cool, dry place.
Solar array amperage exceeds controller
rated input amperage.
Decrease the amperage of solar panels
connected to the controller or upgrade to
a higher rated controller.
Solar array voltage exceeds controller
rated input voltage.
Decrease the voltage of solar panels
connected to the controller.
Solar array input wires connected with
reverse polarity.
Disconnect and re-connect with correct
wire polarity.
Battery connection wires connected with
reverse polarity.
Disconnect and re-connect with correct
wire polarity.
SET
Load Mode Load Mode
Long [SET] or
12second no
operation
Long [SET]
SET
BAT Type
SET
System Voltage
SET
Over discharge Voltage
SET
Charge Voltage