Hello I recently finished a 1975 tractor ev conversion. It is a 72v 100ah battery and i want to build a solar charge station for it. I know i need panels, a charge controller, battery and an inverter. I already have the battery and have a 72v 8000watt inverter that i use on the tractor already. I dont know how to spec the panels and controller for this application. Any help, products links, specs or suggestions appreciated!