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Old 02-23-2018, 02:49 PM   #13
kchace
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City: Brookline, NH
Country: USA
Vessel Name: Blue Heaven
Vessel Model: Albin 43 classic double cabin, twin 135 Lehmans
Join Date: Sep 2013
Posts: 1,638
Yeah I'm confused also. I started to work out all the math and then I realized you were comparing apples and oranges.

If you're saying you're using 74000/164 =451 watts per hour, that would equal 451/12 = 37.58 amp hours PER HOUR if you want to get that from 12V. One would need a very large battery bank to be able to sustain that for even 12 hours.

I think you'll find that ONE fridge can easily consume 50-75AH per 24hours. 2 100watt solar panels could give you about 50-60 AH per DAY under reasonable conditions.

Ken
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