I've always heard AC with solar is a "no-no". Right now, I've got a 10,000 BTU window AC running in a 6x6 walk in cooler. It takes the room from 55 outside to 35 inside ( well insulated ) and is using less than 3kw/hrs a day ( reading with a Kil-a-watt meter ). A 10,000 BTU AC will cool a reasonably insulated space 350-400sqft according to charts I've looked up. Say you cut that in half, and figured a 10x20 room, and used what I'm using....about 3kw/hrs/day..heck, that's "do-able". With the fan running only, on the unit ( a Samsung brand ), it uses about 100w, and jumps up to 600-610w when the compressor kicks in. So, I think 'some' AC is possible using solar, with a decent sized system.