Maintenance charging solar battery bank: 8 lead-acid 6v deep
Hoping the solar and energy storage folks here will have some advice.
I’m responsible for a seasonal woods cabin that runs off a small solar / battery bank set-up. It shuts down for the winter: the panels are small and not kept free of snow, and the storage location of the batteries is unheated (this is zone 6a- Maine).
So, the move is to pull the batteries into a heated space (basement) and maintenance charge them for the winter.
The question is: Is it best to simply charge as a bank with one charger, identical to how they are arranged for solar?
They are arranged as 2 parallel strings of 4 batteries in series—8 total.
Rolls batteries: 6V, flooded lead-acid, 230AH each.
My assumption is to match voltage (so in this case 24V nominal) and use the existing wiring (even length legs for equalized resistance, charger hooked to opposite sides of strings).
I’m looking at a 3 stage, low amperage charger like this: http://www.chargingchargers.com/soneil-battery-chargers/2404s.html
I mainly want to be sure that charging as a bank of 2-parallel-strings of 4-batteries-in-series is the right way to go. This is how they are set-up in the solar system. Is there any reason to break it up and charge them all in parallel (with a 6v charger) or invest in a multi-bank charger, or use multiple chargers, etc?
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