Charging car battery, how high v is too high?
Not specifically an RV issue, but... Our two year old car wouldn't start today. A quick check of the battery showed just over 8 volts. I connected a Harbor Freight 2/10/50 charger on the 10 amp set...
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The charger is working correctly.
The voltage you were reading was what the charger was putting into the battery to bring it back up to capacity. Once the battery gets near to 100% the charger will then switch to a trickle charge mode. I have a "smart" charger that starts out at about 13.2 volts & cycles in small increments up to 16.0 volts over the charging period, once the battery reaches capacity, the charger senses this & backs down voltage.
The voltage you were reading was what the charger was putting into the battery to bring it back up to capacity. Once the battery gets near to 100% the charger will then switch to a trickle charge mode. I have a "smart" charger that starts out at about 13.2 volts & cycles in small increments up to 16.0 volts over the charging period, once the battery reaches capacity, the charger senses this & backs down voltage.
