GPW wrote:Now wait... if we can get cold from heat , why can't we heat the refrigerant with Solar ??? Wouldn't have to burn anything ... and get solar cooling and ice box
I like your thought process.

Suns not out every day nor shines 24 hrs.
Thermostat to shut the heat and turn it on. Hard to turn the sun off but on solar collectors they can have motor controlled shutter shades that block or partially block but it's getting more complicated now.
A 12vdc fridge is a energy hog. Solar panel charging a battery and running a DC fridge has been done (and more power to the people who do use it and go green). We want a new route, the refrigerant heated by the sun in a heat transfer. Heat can be stored but again getting complicated.
Solar collector not solar panel. There are concentrated and non concentrated collectors. I don't know what temp the ammonia splits at but thats available. A concentrated solar oven will cook a roast, if the ammonia was in there in a bulb and heated it would work but now to make it 24/7's and thermostatically control it
