Overview
A rear battery install that gives an XJ real auxiliary power without turning the cargo area into a wiring problem.
The XJ doesn’t give you much extra electrical headroom, so this install adds a rear-mounted auxiliary battery with a solid mount, protected cabling, and clean distribution for a fridge, lights, air, and comms. The point was not just more power. It was making that power safe, serviceable, and easy to live with.
The tray and hold-down are welded steel and anchored to structure instead of trim, so the battery stays where it belongs. The main feed is fused at the source, the cables are protected against abrasion, and the accessory circuits land on a labeled block so future changes don’t turn into a rat’s nest.
Do the boring parts right: mounting, fusing, routing, labeling.