Paul Niedermeyer· Registered
These units do not defrost, which undoubtedly contributes to their efficiency. This unit's Energy Start rating was 221 kWh/year. And I see the price has gone up on these quite dramatically: I paid $129; they're now around $200. My battery pack is 220 AH (2x 6v golf cart batteries). Presumably, yes, on the 300-ish watts, based on the three days I plugged it into the Kill-a-watt. That's at the fridge 110 outlet, so there's some further loss at the inverter. This is Oregon, but yes, in the summer-fall, we generally have lots of sun.That is actually very good efficiency. With numbers like that, it is tempting to just use a good full size refrigerator. I have wondered how much of the Energy Star rating is from actual refrigeration vs defrost cycles. So you are using just 250 amp -hrs @ 12 volts of battery pack and 300 ish watts? Is this in an area with fairly clear sky?