With the low-voltage disconnect, I'm hoping for much longer battery life going forward -- and lights that stay on longer. The low voltage disconnect will prevent the battery voltage from going below 12.1 volts when I leave the inverter or lights well into the evening.

8 gauge wire with a 60 amp fuse now brings power back to the truck cap. While right now I only have a 20-amp load, I wanted to have options to add additional accessories in the truck cap, and have as little line drop as possible in my truck cap.