Solar Controller
GP-PWM-30
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© 2012 Carmanah Technologies Corporation
September 2012
7.0 Frequently Asked Questions
(FAQs)
Before a problem is suspected with the system, read this section. There
are numerous events that may appear as problems but are in fact
perfectly normal.
It seems like my flooded batteries are losing water over time.
Flooded batteries may need to have distilled water added periodically to
replace fluid loss during charging. Excessive water loss during a short
period of time indicates the possibility of overcharging or aging batteries.
When charging, my flooded batteries are emitting gas.
During charging, hydrogen gas is generated within the battery. The gas
bubbles stir the battery acid allowing it to receive a more full state of
charge. Ensure they are in a well ventilated space.
My voltmeter shows a different reading than the GP-PWM-30 display
The meter value on the GP-PWM-30 display is an approximate reading
intended for indication purposes only. There is an approximate 0.1 volt
inherent error present that may be accentuated when compared with
readings from another voltmeter.
There may be a slight difference between the battery voltage displayed
on the GP-PWM-30 display and the battery voltage measured at the
battery terminals. When troubleshooting using a voltmeter, check both
the battery voltage at the GP-PWM-30 battery terminals and battery
voltage at the battery terminals. If a difference of more than 0.5 volts is
noted, this indicates a large voltage drop possibly caused by loose
connections, long wire runs, small wire gauge, faulty wiring, a faulty
voltmeter or all the above. Consult the Suggested Minimum Wire Gauge
chart in Section 5 for wiring suggestions and check all connections.
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