GP-PWM-30-UL
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Possible Causes:
Panel is covered by something; PV panel is too dirty to supply a high
enough voltage to charge the battery; PV panel is not connected.
Remedy:
Check the panel and to ensure it is not obscured. Clean the panel if it is
dirty. Check that PV cables are connected to the controller.
12.2 Problems with Voltage
Voltage Reading:
Inaccurate
Time of Day:
Daytime/Nighttime
Possible Cause:
Excessive voltage drop from batteries to controller due to loose
connections, small wire gauge or both.
How to tell:
1. Check the voltage at the controller battery terminals with a
voltmeter and compare with the voltage reading at the battery
terminals.
2. If there is a voltage discrepancy of more than 0.5 VDC, there is
an excessive voltage drop.
Remedy:
Check all connections from the controller to the battery including
checking for correct wire polarity. Check that all connections are clean,
tight, and secure. Shorten the distance from the controller to battery or
obtain larger gauge wire. It is also possible to double up the existing
gauge wire (i.e. two wire runs) to simulate a larger gauge wire.
12.3 Problems with Current
Current Reading:
0 A
Time of Day:
Daytime, clear sunny skies
Possible Cause:
Current is being limited below 1 Amp as per normal operation or
poor connection between solar array and controller.
