Solar Controller User Manual (GP-PWM-10-FM)

GP-PWM-10-FM

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.

Voltage Reading: Controller flashes entire LCD for battery overvoltage

Time of Day: Daytime/Nighttime

Possible Causes:

1. Solar current is too large with respect to battery capacity

2. Electrical short

3. Unregulated charging source

4. Damaged/Old battery bank

How to tell:

1. Calculate the total solar array Isc. Find or calculate the battery

bank capacity in amp hours (Ah). Divide the capacity by the total

Isc. If this number is greater than 5, then consider increasing the

battery bank size. (Note: This is a simplified rule of thumb and

does not cover all system sizing situations.)

4. Have your battery bank tested.

Remedy:

Turn off any secondary charging sources such as a generator. If

possible, turn off solar circuit breakers if the error does not clear after

turning off secondary charging sources. If you suspect an electrical short,

seek the help of a qualified professional or your dealer. Consider having

your battery bank tested or replacing your battery bank. Battery capacity

deteriorates with age and extreme use. Wait for the battery voltage to

fall. Batteries self-discharge over time.

11.3 Problems with Current

Current Reading: 0 A

Time of Day: Daytime, clear sunny skies