I don't run any battery monitor system as it was also my starter battery. I do use a voltage gauge just so I can make sure it was being charged via solar. I always say 13.0 v or higher in direct sun.
If you wanna charge the house battery while driving. Probably gonna have to do a duel battery set up. I would use cheap jumper cable wires from harbor freight and a 100amp relay to link them when driving.
https://www.amazon.com/gp/aw/d/B005...0amp+relay&dpPl=1&dpID=41fgxzcM5DL&ref=plSrch
I was thinking of switching out the charge controlled for a mppt but I haven't had any issues with the controller it came with.
I would try the bare basics and see how it works first. This way you don't spend money on things you don't need.
So far I love the inverter. I haven't really used it for anything but to charge my drone battery and it works great. I was able to keep my fridge powered and inverter on during my 2 days in the desert. I do recommend turning off the inverter when not in use at night.
Maybe my fridge is smaller and the 100w panel was enough. I also keep my rock lights on all night.
With more stuff you run. The 2 6v battery is probably the way to go if you have the space. They have much larger reserve.
I'm running a single 31m die hard platinum in my tundra for both starter and house battery.
If I know I'll be camping for extend periods and in shades areas. I would bring my portable 150w kit so I can keep the truck in the shade and panels in the sun. Haven't need to yet. I just park in the sun lol.
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