Re: [electricboats] Generator to recharge battery bank

The charger appears to be a weak link, ~56V at 15A is only ~800W.  You'd need around five hours at that rate to go from 50% to 100% SOC on your VRLA battery bank.  The generator is fine though, and could probably run two of those chargers.  Not that they would cooperate in parallel.

If/when you move to an LFP battery bank, a much-less-involved piece of electronics will suffice for charging.  For my 10kWh LFP bank, I use a MeanWell RSP-1000-48, which can deliver ~56V at 21A (nearly 1,200W), with an important feature that they can be paralleled easily, as they're just adjustable-voltage current-limited AC-to-DC power supplies.  Two of those is probably too much for your generator, but even one would bring that five-hour time down closer to three hours.  And they make a '750' version that would probably allow paralleling with your generator.

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