Even if you camp with full hookups, often the RV or the campground has limited power available. The easiest is the 120 VAC Shore Power connection.

120 Volt AC Shore Power

Shore Power is the term used for the hook up to 120 Volt AC grid supplied power and is provided by campgrounds with full hookups and many RV owners have a connection at their home storage. Read articles about what it all means here.

12 Volt DC system

The typical RV has a complete 12 Volt DC system in addition to the 120 VAC system. 12 Volts power the lights, water pump, slide motors, heater fans, and refrigerator electrics. Those who like to camp in the boondocks away from electrical hookups rely heavily on their 12 Volt DC system.

Generators

Generators and solar systems take up much of the dissuasion on many RV mailing lists and forums. The generator gives you complete freedom from crowded campgrounds and hookups but at a price..

Solar

A solar power system can also give you a freedom from camp grounds and crowds but it cannot entirely take the place of a generator. There is just not enough roof space nor is there enough battery space on an RV to replace even a small 20 Amp generator with a solar power system.

Tools

I carry a small bag with just electrical tools. With the tools in one bag it is easy to find them when needed. The bag contains tools to diagnose and repair both 12VDC and 120VAC. It also contains small rolls of wire, crimp terminals, fuzes electrical tape, and tie-wraps.