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GP-PWM-10 

7.4 

Problems with Current 2 

Current Reading:

 Less than expected       

Time of Day:

 Day, clear sunny skies 

Possible Cause: 

 

(1) Current is being limited below 1 Amp as per normal operation. 
(2) Incorrect series/parallel configuration and/or wiring connections and/or wire gauge.  
(3) Dirty or shaded module or lack of sun.  
(4) Blown diode in solar module when two or more modules are connected in parallel. 

 

How to tell: 

  

(1) Battery State of Charge screen is close to 100% and the Sun and Battery icon are present 
with an arrow in between. 
(2) Check that the modules and batteries are configured correctly and check wiring connections. 
(3) Modules look dirty, overhead object is shading modules or it is an overcast day in which a 
shadow cannot be cast. 

Note:

 Avoid any shading no matter how small.  An object as small as a 

broomstick held across the solar module may cause the power output to be cut to almost nil.  
Overcast days may also cut the power output of the module to almost nil. 
(4) Disconnect one or both array wires from the controller. Take a voltage reading between the 
positive and negative array wire.  A single 12 volt module should 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 with either the 
positive or negative wires disconnected from the terminal.  

 

Remedy: 

 

(2) Reconnect in correct configuration. Tighten all connections. Check wire gauge and length of 
wire run. Refer to Suggested Minimum Wire Gauge in Section 4. 
(3) Clean modules, clear obstruction or wait for conditions to clear. 
(4) If the open circuit voltage of a non-connected 12 volt module is lower than the 
manufacturer’s specifications, the module may be faulty. Check for blown diodes in the solar 
module junction box, which may be shorting the power output of module. 

8.0  General Warranty 

Carmanah warrants the GP-PWM-10 for a period of one (1) year from the date of purchase. This 
warranty is valid against defects in materials and workmanship for the one (1) year warranty 
period. 

Proof of purchase is required

 for any warranty replacements. Visit 

gpelectric.com

 for 

warranty details. 

8.1 

 

Return Information 

Visit 

gpelectric.com

 to read the “frequently asked questions” section of our website to 

troubleshoot the problem. If trouble persists: 

1.   Call your Go Power!

®

 Technical Support team (1-866-247-6527). 

2.   Return defective product to place of purchase 

 

 

 

 

 

 

 

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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