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Old 17-11-2014, 16:30   #1
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Location: New Zealand
Boat: Dufour 45 Classic
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Nemo-40 12v 40 Amp charger

Question: I have a 60 amp alternator which is stock standard on Volvo Penta MD22p. My Yacht also has a Nemo-40 12v 40 Amp charger fitted. Does that mean that the charger limits the power going from my alternator to my battery bank or does the charger only limit 220v shore power to 40amp for charging purposes? I wish to upgrade my alternator to say 115 but do not understand these things. My Yacht is in Greece and I am in New Zealand so I can not just get the local sparky to have a bo-peep. Any knowledge out there to help me to understand?
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Old 18-11-2014, 00:12   #2
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Re: Nemo-40 12v 40 Amp charger

they are totally separate devices. the alt is powered by your engine, and the charger is powered by shore power. if you plug into the dock and run your engine you'd have both working and get 100a.


you can upgrade one or the other or both.
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Old 18-11-2014, 02:30   #3
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Re: Nemo-40 12v 40 Amp charger

Thank you for that. This is just the reply I was looking for. Somehow I had the wrong impression that the nemo was controlling the amps from the alternator and was regulating the power going into the batteries back to 40. You have made my day, now I will go ahead and upgrade my regulator the 60amp one does not appear to even load the 60hp diesel which seems to be such a waste when only needing a charge. Cheers
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