My paddock doesn't have any trees. The horses share a 10x12 run-in shed and seem content to share. I feel bad that it is so hot. With the temp and humidity it feels like 105 outside. I just went to hose them down and they were sweating from just standing around. I was thinking about getting one of these. Has anyone ever tried it? I will also need a solar charger because I don't have electric in the run-in, does anyone know what size charger I will need?