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Old 10-08-2012, 09:52 PM   #1
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Battery Charging

When dry camping and charging with my generator I cannot get battery voltage above about 12.5 volts. The generator will charge at up to 13.5 for a bit, but then backs off to between 12.3 to 12.5 volts and then go back to 12+ volts again. The generator will carry my two HVAC Units, microwave, etc. If I charge the batteries on shore power they will obtain a full charge. Batteries are 2 years old and I have 4 of them. Any suggestions as to what is wrong?
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Old 10-08-2012, 10:24 PM   #2
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Probably nothing. How long are you running the generator? Just getting them up to full charge could take 6 to 8 HOURS of run time.
Usually I take mine up to "float charge" what takes about 2 hours on my 4 Interstate U-2200's with 8KW gen at 100 amps charge rate.
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Old 10-09-2012, 05:48 AM   #3
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Since this is in the general RV discussion section, you might get more response if you let us know basic info on type of generator and brand and model of charger.
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