battery monitor

So after accidentally leaving my old AGM batteries connected after a trip, I found myself with two nuked 100ah batteries. Additionally, while away camping I found myself hawking the Volt and Amp readout on my trailer much like an old man monitoring the thermostat or Air Conditioning settings on...

My solar setup is designed for use independent of the vehicle, and the solar panel is the battery's only charging source - there is no battery charger in the circuit. Otherwise it's a 250W solar panel through a Kings solar controller (there's one on the panel too, but I am a sucker for a sales...