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On-board Battery Charger with Generator and Engines Running


The other day I took the boat out for a 1 hour exercise because it was a beautiful day. As I was cruising along it occurred to me that with both engines running at about 2400 rpm the alternators are putting out sufficient amperage to provide adequate charging to the battery bank that’s selected. However, I don’t believe the opposite battery bank (selector position 1 versus 2) is being charged by the engine alternators. Only the battery bank that’s selected.

So here’s the question:

Should I turn off the On-board battery charger, if the generator and engines are running to prevent both Alternator and battery charger operating simultaneously?

Maybe I’m overthinking this? But it’s all still new to me!

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