I added a shunt based AH meter to my RV that does this, seems pretty standard tech, not sure what the big deal is: https://www.magnum-dimensions.com/battery-mo

I added a shunt based AH meter to my RV that does this, seems pretty standard tech, not sure what the big deal is: https://www.magnum-dimensions.com/battery-monitor-kit https://www.magnum-dimensions.com/battery-monitor-kit