I started doing some mods today. To keep from having "brown-out" issues at campgrounds I installed a digital voltage meter to keep an eye on the current flow.
It fit right into the cabinet with the rest of the switches.
Rough in - Wires connected to outlet above.
Initial test - about 8 minutes into the installation
Spent about $6 for the meter on ebay and took about 15 minutes to install. I am thinking about installing one now for the battery too.