Jeremy Baker wrote:My understanding is there are wide temperature changes there in the semi arid region. That makes design a bit more challenging and opens up possibilities. As was mentioned earlier that placing food outside at night or seasonally can be effective.
I wonder if you could run water through “chillers” at night and store cold water. Basically solar hot water panels running in reverse. A tank in the ground (root cellar) and a tank up in the air above the collectors. You would have some cold water and some hot water most of the time. And a pump may not be necessary if it can thermosyphon due to convection.
There are large “chiller” panels from big refrigeration walk in coolers. I had one and wish I still had it. It was aluminum and I think it originally had ammonia or a refrigerant in it. These would be interesting to play around with.
frank li wrote:Sounds like the Sun Danzer has proven its value. When refrigeration was not possible it was producing ice to aid in heat removal! A matching fridge would likely end your issues with a slightly improved pv system....
Dissapointment is a type of cost associated with alternatives also....
Dont give up on lead acid. It is simple, robust and state of the art technology as opposed to "state of the finnicky coin flip" and your system will function without dissapointment and with longevity if you dont place unrealistic demands on it.
Joel Salatin has signs on his property that say "Trespassers will be Impressed!" Impressive tiny ad:
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