The RVer replaced both 6-volt house batteries in a 2018 Jayco Alanta 26X and found that, even after being plugged in at home for days, the new batteries showed only a 2/3 charge and seemed to be draining instead of charging. Members suggested checking the basics first, including whether the batteries were connected correctly, whether the battery disconnect or “salesman switch” was on, whether converter reverse-protection fuses had blown, and what voltage showed at the battery terminals with...
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The RVer replaced both 6-volt house batteries in a 2018 Jayco Alanta 26X and found that, even after being plugged in at home for days, the new batteries showed only a 2/3 charge and seemed to be draining instead of charging. Members suggested checking the basics first, including whether the batteries were connected correctly, whether the battery disconnect or “salesman switch” was on, whether converter reverse-protection fuses had blown, and what voltage showed at the battery terminals with a voltmeter.
Several members focused on possible wiring or polarity issues because the owner installed the batteries and no longer had the original reference photo. A member noted that multiple positive leads and one negative lead at the battery bank can be normal, with the positive leads going to the main positive connection and the negative lead to the main negative connection, while some RV circuits may connect directly to the battery. The topic did not reach a confirmed fix, but the leading direction was to verify the 6-volt series wiring, polarity, disconnect switch, fuses, and charging voltage.
