Since our property is now powered by solar panels pretty much everything we do ends up being solar powered. A issue came up with charging our new golf cart. The problem is that the golf carts system is 36VDC. Our solar panels run at 48VDC. The inverters output 110VAC or 220VAC. I quickly ordered a used golf cart charger from ebay, but since I wanted to keep on driving the golf cart until the charger arrived. I rigged this up. Three 15W solar panels in series. They got the battery up from 36VDC to 38.6VDC today. I want each cell to hit 2.3V which means 41.4V is max charge. I'm going to let it charge all tomorrow and see how it does.