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Fastfwd75's avatar
Fastfwd75
Explorer
Jun 10, 2014

Battery was doing fine on the fan but the lights deadly

Was testing my battery for future dry camp use. Had the vent fan on for 5 hours and the battery still showed full. Added 3 lights fixtures(total 6x921 bulbs) for 40 minutes. The battery shows 1/3 f...
Seeking Advice
mbopp's avatar
mbopp
Explorer
Jun 10, 2014
The indicator panel is useless as a state if charge indicator. The only meaningful measurement is with a voltmeter directly across the battery terminals or a hydrometer to measure the specific gravity.

A useful link:

12V Side of Life

I don't let my batteries fall below 12.00V or 50% charge.

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