Basic Components for DIY solar. 1=Solar Panel 2=Charge Controller 3=Deep Cycle Batteries 4=DC/AC Inverter 5=Size your system using the PIE formula (P= watts, I=amps, E=volts). To size your system, find how many watts or amps it takes to start and run your appliances/load (look online, on labels, or in manuals). The system is usually going to be 12v, so you'll either be solving for amps (I) or watts (P). Use the results to know which products to buy. To be successful, start small and simple.