Join Date: Nov 2008
Location: Deale, MD
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A note on power consumption.
I checked my wife's new CPAP more carefully:
5.2 amps at 12V if running full load, including water heater.
2.5 amps at 12V if running only the blower.
This may be the source of some of the confusion. Since it is very damp around most boats, my wife does not use the heat or the humidifier on the boat, only in the house in the winter when the air is very dry.
So, 30 AH is not so bad. Still after a few days, you will need some juice. I would add a second battery before I added solar; less money, complication, and needed if you add solar and other toys anyway (solar is great until it's cloudy, so it is best to have batteries for 2 days anyway). Also consider the size and type of the batteries; 2 group 27 deep cycles have a lot more kick than 2 group 24 starting batteries, and the size difference is minor.
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