Use and Care Manual

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. 54inch
130m m/5 .11in ch
21.1mm/0.83i nc h
34.6mm/1.36i nc h
124m m/4 .88in ch
77.4mm/3.04i nc h
112.39mm/4.4 2i nc h
2*φ3.5mm/2*φ0.13 in ch
90mm/3.5inch
2*φ3.5mm/2*φ0.13 in ch
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 /0.31 inch
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