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Old 17-02-2015, 08:33   #1
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110V/220V battery charging

Hi, just a quick question thats probbaly been answered 100 times before. We are now in St Martin with our 220V boat and would like to charge the batteries from the 110V shore power. Our shore power chargers are 2 cristec CPS30Em 40A. From the manual:
All CPS3 battery chargers can operate automatically and equally on single phase networks from 85 to
265VCA and from 47 to 65Hz.

On board we have a switch which was installed with the inverter that selects Shore/off/inverter.

I would like to be able to bring the batteries up to full charge and possibly also heat the hot water, but thats not critical.

Is it just a matter of making an adapter plug for my existing shorepower cord to charge the batteries, and leave the switch in the inverter position so the sockets run at 220V via the inverter?

Im not sure how the fridges are wired, are they usually 12V or would they be 220V when plugged in and possibly damaged by connecting 110V?

Any advice appreciated.
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Old 17-02-2015, 22:25   #2
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Re: 110V/220V battery charging

the eaisiest way would be to make 120v plug pigtails for the chargers. and plug them direct to the dock with an extension cord. then run boat off inverter.

I would not plug the boat in.
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Old 18-02-2015, 15:45   #3
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Re: 110V/220V battery charging

I've had success using a 240 to 120 transformer. Shore power feeds in 240v it's then converted to 120v for the boats systems.

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