First thing I did was replace both batteries…The first question is, how old are the batteries? If original they are in the 7 year old range and should probably be replaced. If one is bad that will drag down the other.
Are all anodes free of corrosion?
Peace
Dave
You can pretty much test it with a voltmeter across the battery terminals. Read and note the DC voltage with the RV unplugged from shorepower. Then plug in power and note the reading again. Ideally if your battery is down, and you have the original Progressive 9260 convertor/charger, your charger should be in its 1st (boost mode) charging state, and the charging voltage across the battery should be 14.4 volts. See: https://www.progressivedyn.com/rv/charge-wizard/ An increase in voltage from the 1st reading to the 2nd reading shows that the charger is doing SOMETHING.First thing I did was replace the batteries….. thinking it’s a problem with the convertor… if I can ever find it to test
Appreciate the info…. All my 12v systems work I just can’t keep my batteries charged… been using. Trickle charger til I can dig into it deeper… this is a great getting all this input… I will remember that if I can ever help out!There is one major non-automatic resetting circuit breaker in the battery charging current path. When this circuit breaker is open, with shorepower disconnected, the major symptom is NO 12 volt DC battery powered lights or voltage in the trailer. From what you have described, I don't think that this is your situation, but i thought I would put out that easy, to check/correct possibility out there.
See: Page 4 of this 12 volt users guide: https://manuals.heartlandowners.org/manuals/User Guides/12V Block Diagram & Diagnostics V2.pdf
Thanks for input…. I will certainly check it out… appreciate your adviseIf it were my trailer, I would next try to measure how much current is going into my battery system when the charger is doing its job with a DC ammeter. You might be able to borrow one from auto parts stores, and at least 60 amps max rating should work (I have heard of some converter chargers at 80 amps max charge). Maybe you have a bad wiring connection somewhere limiting the charge current. If your charger is trying to charge a depleted battery system, its max charge value should cause enough heating in any possible bad electrical connections that you can feel the heat to touch. !2 volts DC won't shock dry skin. Of course you can try to measure any voltage drop across connectors with a DC voltmeter, too.
Good Luck on this!!!