Battery Batch

Most remote power systems are wired for 12 volts. Some larger systems are wired for 24 volts. It’s a delicate call to make this decision in most cases. Even larger voltages are used in some huge systems. The main advantage of 24 volt systems over 12 volts is that wire size is cut in half throughout the system. Besides affecting battery bank wires, this includes solar panel, wind generator and hydro plant wiring, too–if you have hundreds of feet of wire, this cost can add up quickly. The disadvantages of using 24 volts are that 1) you’ll need an expensive, power-wasting transformer to run 12 volt lights and appliances, and 2) if you want to buy a cheap, Chinese inverter, they are only available in 12 volt versions. More expensive inverters are available in different voltages. Here is a battery diagram for a 24volt system.