Mark959 wrote:Just found out my minifridge consumes as much power as a larger fridge if not more, so I think I am going to upgrade to a 2-compartment fridge freezer in the 10-18cu ft size. My current is a 4.4cu ft or less I think. Freezer inside fridge compartment with one door. Shooting for 300 kwh yearly or less - about 800 watts a day, 50% Battery draw down should give me nearly 2 days without solar input, not accounting for energy losses from running an inverter.
My old cobra square wave 1500w inverter that died was about 85% efficient and ran the fridge just fine, I think it was around 350kwh yearly... I think I can improve efficiency some by getting a sine wave inverter.
My only other concern is that with only 200w of solar power I would need four hours of good light to recoup the losses, I will probably have to double up panels to cut that down to two hours. If so then i will need a better MPPT charge controller too. That or try to find a fridge closer to 200 kwh/year. So far the only ones I can find that come close cost a couple thousand, whereas only a couple hundred for ~300 kwh/yr. Sadly a chest freezer/fridge wont work in the space either. Perhaps I can modify auto-defrost off too, that could get it down to 500-600 watts daily. I am willing to slap some insulation under and around it, or any other tricks as long as it doesnt look like crap. Or I could add insulation to the insides?
I bought the small one from Eastwood, Haven't used it much so I can't vouch for the quality yet, but the prices are good.Mark959 wrote:Know any decent affordable pure sines on amazon or ebay?
Iconfabul8 wrote:I bought the small one from Eastwood, Haven't used it much so I can't vouch for the quality yet, but the prices are good.Mark959 wrote:Know any decent affordable pure sines on amazon or ebay?
Eastwood Inverter Link
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