Posted by jdemaris on May 01, 2009 at 11:12:18 from (72.171.0.144):
This is a follow up after my last post about using a small AC refrigerator with twin 6 volt batteries and an inverter - in a small motorhome.
After screwing around with the math projections, I hooked it up and tried it. Seems to work well, so I'm installing it.
Hooked to two batteries - deep cycle 6 volt 225 AH with inverter. One slight variable is that the fridge draws slightly more amps via the mod-wave power, but only by a small amount.
Ran it for a little over 24 hours which is more than I'll ever need. Basically will only need it at night when we're sleeping and not driving. Otherwise, the alternator will run it.
1:15 PM battery voltage 12.97 100% charge
10:30 PM battery voltage 12.22 VDC 60% charge
8:15 AM (next day) battery voltage 12.09 VDC 49% charge
1:45 PM battery voltage 11.94 38% charge
3:15 PM battery volage 11.9 38% charge
Read-out when at 24 hours and 30 minutes use showed .43 KWH was used (430 watt hours)
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