- The devices you want to run.
- A battery to power the devices you want to run (generally a deep cycle battery).
- Something to charge the battery that is powering the devices you want to run.
How do you wire a 12-volt battery in parallel?
https://www.youtube.com/watch?v=KC71KxdyID8
How does a 12V system work?
12V System Benefits The alternators generate 12V to charge the battery. When it comes to RVs, most appliances such as RV refrigerators and all the lighting work on 12V as well. 12V systems only require one battery and work well for low-power applications and short wire runs.