Chassis Battery Voltage February 03, 2026, 01:03:13 pm I went out this morning to do the monthly generator run. I like to check all the battery voltages before starting and I noticed that the chassis battery voltage is higher than normal. I verified the BlueSky reading with a multimeter at the battery terminals. The motorhome has been sitting for about a month without running the engine or generator. What might cause this?
Re: Chassis Battery Voltage Reply #1 – February 03, 2026, 01:49:00 pm Hi Greg; The aux light is lit on the BSE solar controller. It is receiving sunlight from the solar panels. The Auxilliary output was wired by Lazy Daze to provide a trickle charge to keep the chassis battery charged up. It looks high because of so called 'surface charge'. This voltage will drop within seconds to about 12.9 volts if you put a significant load on the chassis battery. A few minutes of headlights should reduce this voltage. Starting the engine would also, but you won't see it because the engine alternator will cover that up. surface charge on lead acid car battery - Google Search It's fine Greg, not to worry! RonB 2 Likes
Re: Chassis Battery Voltage Reply #2 – February 03, 2026, 02:13:35 pm Appreciate that, Ron. A follow up question: if the chassis battery is left in that high voltage state for a long period of time, could it damage the battery?
Re: Chassis Battery Voltage Reply #3 – February 03, 2026, 02:21:05 pm Quote from: HiLola - February 03, 2026, 02:13:35 pmAppreciate that, Ron. A follow up question: if the chassis battery is left in that high voltage state for a long period of time, could it damage the battery?No, that is normal.Larry
Topic: Chassis Battery Voltage (Read 161 times)
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Topic: Chassis Battery Voltage (Read 161 times)
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