best way to test house batteries ?
Hello Everyone… I have a 2003 Ford F-53 RV What’s the most accurate way to test house batteries using multimeter and hydrometer? Disconnect from shore power then keep few lights on inside the R...
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For the most accurate results disconnect the batteries from EVERYTHING. If you have two 12V batteries in parallel disconnect them. Using a separate charger, charge completely. This might take 24 hours or more.
Disconnect the charger and let the batteries "rest" for about 30 minutes. Check and record the voltage of both batteries. Without connecting shore power, connect ONE battery and turn all interior lights. Better yet, buy a Harbor Freight battery load tester (LED lights can not generate enough load). Follow direction with the load tester. With lights you will have to leave them on for 15-30 minutes. Record the voltage at the battery.
After charging and resting the battery voltage should be about 13.2V.
After the load has been removed the batter voltage should be above 12V.
Disconnect the charger and let the batteries "rest" for about 30 minutes. Check and record the voltage of both batteries. Without connecting shore power, connect ONE battery and turn all interior lights. Better yet, buy a Harbor Freight battery load tester (LED lights can not generate enough load). Follow direction with the load tester. With lights you will have to leave them on for 15-30 minutes. Record the voltage at the battery.
After charging and resting the battery voltage should be about 13.2V.
After the load has been removed the batter voltage should be above 12V.
