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britinusa
Web Editor

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USA
5404 Posts
Initially Posted - 04/21/2007 :  12:31:55  Show Profile  Visit britinusa's Homepage
Having just replaced both batteries and the battery charger (most likely due to running cabin appliances while charging the batteries from shore power) I'm looking at ways to overcome the inconvience of not having cabin power while battery charging.

One thought is a large AC adapter (110v > 12v)

It would require a 'shore power || battery power' switch in the positive line from the battery selector switch to the cabin distribution panel.
In the 'battery power' position it would supply the cabin utilities from the boat batteries.
In the 'shore power' position, it would supply the cabin utilities from the AC adapter plugged into a 110v outlet onboard.

Now the question: has anyone figured out the DC power requirements (Watts) for the standard stuff onboard (cabin lights, anchor, running, bow, deck lights)? I can look up the numbers for our TV/DVD player, stereo, water pump, gps, vhf and the wind/depth stuff.

Realistically some of that equipment would not need to be run at the same time (anchor light and running lights for example)

TIA.


paul
Joint Decision. (Sold)
PO C250WB 2005 Sail # 841.


Moved up to C34 Eximius

Updated August 2015
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Nautiduck
Master Marine Consultant

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USA
3704 Posts
Response Posted - 04/21/2007 :  13:21:37  Show Profile
The easiest thing to do is to return the Guest charger to West Marine and get a Xantrex instead. The Xantrex allows cabin power while charging. WM is easy about returns.
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At Ease
Admiral

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672 Posts
Response Posted - 04/21/2007 :  16:51:31  Show Profile
To convert 110 to 12v you need a converter. All RVs have them. If you are using shore power, the converter will allow you to run both 110 and 12v appliances...as well as charge your batteries. If not using shore power, the 12v appliances are used as normal and the converter is not used (not on). This one is a little pricey, but gives an idea of what it can do: http://www.campingworld.com/browse/products/index.cfm/Outdoor-and-RV-Accessories/RV-Maintenance/Electrical--Solar/Converter/Chargers/TRUEcharge-40-Charger/Converter/prodID=3159
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.