Thinking of installing a battery monitor, but not sure if it worth the trouble and expense. I'm looking at a 30amp that the power use and charge goes through and a 50amp that samples with a shunt. There isn't a huge difference in price. The 50amp is a little more involved to install, but not really an issue. There is the issue of the monitor also using some battery power. I also have 12v power ports that I could just plug a volt meter in to check the voltage.