To make trailer living off the grid we are working on two fronts.
1) Shade – I took the old side door panels from the old shop and put them over the trailer and shop container.
2) Cooling – Built a 12 volt evap cooler from a plastic tub and pvc pipe. Used some old plywood to duct the air into the trailer roof vent. We won’t freeze but it takes the edge off the heat – Maggie isn’t quite the desert rat that I am.
The wood box behind the cooler drops down over the vent and cool to duct the air inside. Once a day I fill the tub with water.