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GP-PWM-10 

1.0  Installation Overview 

1.1  Introduction 

A Solar Controller (or Charge Controller / Regulator) maintains the life of the battery by 
protecting it from overcharging. When your battery has reached a 100% state of charge, the 
controller prevents overcharging by limiting the current flowing into the batteries from your solar 
array. The GP-PWM-10 is rated for a continuous solar current input of 10 amps, uses Pulse 
Width Modulation (PWM) technology and a unique four stage charging system that includes an 
optional equalize setting to charge and protect your battery bank. 

1.2  Specifications 

Description 

Value 

Dimensions

 (H x W x D): 

102 x 130 x 27 mm 
4.02 x 5.12 x 1.06 in 

Weight:

 151 grams / 5.34 oz 

Maximum Wire Gauge:

 #6 AWG 

Warranty:

 1 year 

 

  PWM charging 

  4 Battery charging profiles 

  4 Stage charging 

  Monthly equalize option 

  Displays charging current, 

Battery voltage and battery 
state of charge 

  Reverse polarity protected 

  Temperature compensated 

  RoHS compliant 

 

Accepts up to 10 Amps DC 
Input Current

 

The total rated Maximum Power 
Current (Imp) of the PV input 
should not exceed 10 Amps

 

Nominal System Voltage 

12V 

Max. Solar Array Current 

10 amps 

Battery Voltage Range 

6V – 15.5V 

Max. Solar Voltage 

25V 

Bulk / Charge Voltage 

10 – 14 V 

Absorption Charge (Gel/AGM/WET) 

(14.1 / 14.4 / 14.7) 
(25 °C / 77 °F), 1 - 2h / day 

Float Voltage 

13.6 (25 °C / 77 °F) 

Equalization Voltage 

15.5V (25 °C / 77 °F), 
2h / 28 day or V < 12.1 

Temperature Compensation 

- 24mV / cell*K 

Operating / Display Operating Temp. 

- 20 to 50 °C  /  - 13 to 122 °F 

Storage Operating Temp. 

- 40 to 85 °C  /  - 40 to 185 °F 

Humidity 

100% N.C. 

Protection 

Battery reverse polarity, solar array reverse polarity, over temp., 
PV short circuit, over current

 

2.0  Warnings 

 

Disconnect all 
power sources 

Electricity can be very dangerous. Installation should be performed only 
by a licensed electrician or qualified personnel. 

 

Battery and wiring 
safety 

Observe all safety precautions of the battery manufacturer when 
handling or working around batteries. When charging, batteries produce 
hydrogen gas, which is highly explosive.  

 

Wiring connections 

Ensure all connections are tight and secure. Loose connections may 
generate sparks and heat. Be sure to check connections one week after 
installation to ensure they are still tight. 

 

Work safely 

Wear protective eyewear and appropriate clothing during installation. 
Use extreme caution when working with electricity and when handling 
and working around batteries. 

 

Observe correct 
polarity 

Reverse polarity of the battery terminals will cause the controller to give 
a warning tone. Reverse connection of the array will not cause an alarm 
but the controller will not function. Failure to correct this fault could 
damage the controller. 

 

Do not exceed the 
GP-PWM-10 Amp 
current and max 
voltage ratings 

The current rating of the solar system is the sum of the Maximum Power 
Current (Imp) of the solar PV strings in parallel. The resulting system 
Imp current is not to exceed 10A. The voltage of the array is the rated 
open circuit voltage (Voc) of the PV array and is not to exceed 28V. If 
your solar system exceeds these ratings, contact your dealer for a 
suitable controller alternative. 

Summary of Contents for GP-PWM-10

Page 1: ...Installation Overview 2 2 0 Warnings 2 3 0 Choosing a Location 3 4 0 Installation Instructions 3 5 0 Operating Instructions 4 6 0 Frequently Asked Questions FAQs 5 7 0 Troubleshooting 6 8 0 General Wa...

Page 2: ...20 to 50 C 13 to 122 F Storage Operating Temp 40 to 85 C 40 to 185 F Humidity 100 N C Protection Battery reverse polarity solar array reverse polarity over temp PV short circuit over current 2 0 Warn...

Page 3: ...or other applications please refer to standard wire guide 95 Watt 10 Wire Gauge 160 Watt 10 Wire Gauge Identify the polarity pos and neg on the cable used for the battery and solar module Use colored...

Page 4: ...t Software version test Rated voltage Current test After going into charging process the LCD displays the charging states as below Press VOLT AMP button in sequence the LCD will display in turn with B...

Page 5: ...run this stage to bring the internal cells as an equal states and fully complement the loss of capacity Gel and AGM battery do not run Equalization charge Float Charge Battery is fully charged and ma...

Page 6: ...troller battery terminals with a voltmeter and compare with the voltage reading at the battery terminals If there is a voltage discrepancy of more than 0 5 V there is an excessive voltage drop Remedy...

Page 7: ...have an open circuit voltage between 17 and 22 volts If you have more than one solar module you will need to conduct this test between the positive and negative terminals of each module junction box...

Page 8: ...minals on the solar controller First connect the battery to the controller and then connect the solar panel to the controller The controller will not work unless there is a battery connected to the ba...

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