Power Distribution Boxes
Overview
Overview
Power Distribution Boxes Overview
About Power Distribution Boxes
About Power Distribution Boxes
A distribution box is the fuse box the vehicle never came with.
One heavy feed from the battery comes in. Several feeds go out, each to its own circuit. On most boxes each output is separately fused; on the larger hubs and systems the arrangement varies, so check the model. The fridge, the lights, the pump, the USB sockets, the fan. Nothing is daisy-chained off a socket, nothing is stacked on a battery post, and when one circuit faults the rest keep running.
That is the whole product, and it is the difference between a 12V system that was designed and one that grew. A setup built without a distribution point ends up with every accessory wired back to the battery on its own run, six lugs on one post, and no way to isolate a fault without pulling the lot.
The boxes here range from a compact block with a handful of fused outputs, for a canopy or a trailer, through control hubs that put a DC to DC charger in the same enclosure, to complete power systems where the distribution is one part of a board that also charges and monitors.
Size it two ways. Count what needs its own feed, add two for the things that will turn up next year, and check the box's total and per-output current ratings against what those circuits will actually draw.
Then mount it where the fuses can be reached without unpacking the vehicle. A distribution box is also the first place to look when something stops working, and a box in a locker under the bed is a box that gets checked last.
