Solar Float and Shore Power Float?
Been a few threads on this, but I never had the "issue" until now, so I am not too clear on just what is at stake here. On shore power Floating the batts at 13.8 (or whatever temp comp adjustment c...
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BFL13 wrote:
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Instead of staying at 13.8 all day on just converter it gets to 14.5 or so depending on how much sun gets on it (highly variable where the RV is). It can take all of the daylight hours to get there so it is above 13.8 all day.
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When boondocking our batts were often in the low 14s, high 13's during the day with solar charging, cause the loads never allow the absorb set point to be reached. Not too worried about it. The only way I know of to change that is to alternate between two separate battery banks: while one is charging, use the other for loads.
When on shorepower, or in storage with no shorepower, I isolate the batts from all loads and let the solar charger maintain them. So every day the batts are pulsed with 14.8V then float at 13.2V then nothing when the sun goes down. As the only load is self-discharge, it usually doesn't take long to get to 14.8V and absorb is terminated when the current drops, not time based. But on dark rainy days, it might take longer to get there.
EDIT: On sunny days in storage, my charger can record zero minutes at absorb V, with the rest of the day at float.
EDIT: And just multiply all those Vs by two for my current 24V battery bank.
Are your batteries completely isolated when on shorepower?
