I have a group 31 battery in the stock location using the Slee tray. I used the Slee second battery tray (with my ARB dual compressor mounted to it) after taking the AHC out. Right now, my setup is that everything runs off the Group 31, and the second battery is just a jump battery with a momentary switch in the dash to connect for jumping (both batteries charge from a Redarc BCDC1225D). The inverter outlets and the 12v outlets i put into BenCC's panels are all direct wire to the group 31 battery - the inverter directly and the 12v plugs run through a fuse block mounted in the driver side rear cargo area behind the panel with the jack so it will be accessible. I left the second battery alone, so I'll always have a way to start the engine even if I mess up and drain the group 31. The inverter is mounted behind where the cubbies were in passenger side of the third row/cargo area. The way it mounts, you lose the small cubby completely and about 1/3 of the big cubby. I'm going to modify the big cubby by cutting it off the end part, cutting off enough to clear the inverter, then gluing the end piece onto the rest of the cubby piece - basically, shortening the length of the big cubby so 2/3 of it will still be usable. I'm out of town for a couple days but can post some pics when I get home on Wednesday.