User Manual

Table Of Contents

GP-PWM-30

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8.2 Problems with Voltage

Voltage Reading: Inaccurate

Time of Day: Daytime/Nighttime

Possible Cause:

(1) 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. If there is a voltage discrepancy of more

than 0.5 V, there is an excessive voltage drop.

Remedy:

(1) 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.

8.3 Problems with Current

Current Reading: 0 A

Time of Day: Daytime, clear sunny skies

Possible Cause:

(1) Current is being limited below 1 Amp as per normal operation.

(2) Poor connection between solar array and controller.

How to tell:

(1) The State of Charge (SOC) screen is close to 100% and the Sun and Battery icon are

present with an arrow between.

(2) With the solar array in sunlight, check the voltage at the controller solar array terminals

with a voltmeter. If there is no reading at the controller solar array terminals, the

problem is somewhere in the wiring from the solar array to the controller.

Remedy:

(2) Hold down the A Button for approximately 5 seconds to activate Maximum Power

Boost. This will allow the controller to charge batteries to 14.4 +/- 0.1V with all current

the solar array is producing.

(2) Check all connections from the controller to the array including checking for correct wire

polarity. Check that all connections are clean, tight, and secure. Continue with the

solutions below for additional help on low current readings.