So, this past weekend, I finally broke down and got the Trimetric 2030RV battery monitor installed to replace a cheap meter that I used to measure volts, amps, watts, but didn't indicate the charge level of my battery. I had to do a little rewiring and found by chance that a cable from my converter, the tongue jack, and the battery were tied together with a wire connector screw terminal (used in home wiring) with electrical tape! This connector sits outside in the elements! I know some connectors are waterproof (filled with silicone), but this one was not and the wires were corroded. I guess nothing should surprise me anymore about the build quality. I used a butt connector (heat shrink type for exterior use) to tie the battery wire to the converter wire and connected the electric tongue jack wire directly to the battery with terminal ring. Not what I had planned to do, but I was glad to have found it before something went wrong.