Websites that offer a wiring diagram for a 24-volt system include Trollingmotors.net, Freesunpower.com and Aessolar.com. These websites show how users can connect several battery units to create a 24-volt system.
Trollingmotors.net offers a diagram for connecting two 12-volt batteries to a circuit breaker and a trolling motor. Aessolar.com shows users how to connect four 6-volt batteries or two 12-volt batteries together to power a system. Freesunpower.com offer guides on wiring two 12-volt batteries using parallel wiring or series wiring. The series wiring helps to increase the voltage levels. Batteries are available in 2, 4, 6, and 12 volts to allow homeowners use a variety of combinations to get a 24-volt battery system.