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AuthorMessage
Robmarkham
Robmarkham

Posted: Mon Jul 17, 2017 8:34pm

Post Subject: Battery charging

I'm out on my narrow boat at the moment and the alternator seems to have stopped charging my leisure batteries. Can i charge them temporarily from my starter battery with jump leads whilst I'm moving?

langwadu
langwadu

Posted: Wed Dec 06, 2017 12:10pm

Post Subject: Battery charging

Tony-B
Tony-B

Posted: Wed Dec 06, 2017 1:16pm

Post Subject: Battery charging

Yes but remember that if its a twin alternator boat the engine alternator often has a lower output. As long as the boat is wired according to common practice you should only need to join the engine and domestic battery positives. Just take great care not to short the jump lead to anything metal or a negative connection. If its a twin alternator boat the domestic alternator has probably failed. If its a single alternator boat then the charge splitting device (relay, diode, or 4 way switch) is probably faulty. If its a 1, 2, both, off switch and its new to you then the problem might be incorrect operation.

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