Under body power distribution

[Stitebunny]

I’m looking to add a power distribution block/fuse panel under my van.
Supplied by the under body leisure battery bank.
It will get mounted out of direct water/mud, unlikely to see deep water crossings etc.
Any recommendations for a “waterproof” unit?
I live in the PNW and it can stay pretty damp under the vehicles. Maybe a 6-8 circuit system would be enough.
Thinking maybe one of the Bluesea panels would be a good option?

 

[llamalander]

The Blue Sea Safety-Hub 150 is a solid small panel that can carry significant loads--it's ignition protected, but in no way waterproof.
I would be surprised to see that anyone makes a waterproof panel, You may do better mounting a pelican or knock-off waterproof box and using strain relief connectors to keep the wire-entry points sealed.
Alternately, they do make waterproof breakers, you could wire up a bank of those and maybe velcro a cover over them to keep them cleanish.
Under a vehicle is a pretty dirty place, with plenty of small objects traveling fairly quickly bouncing around--personally, I wouldn't subject something as important as my electrical system to unnecessary abuse...

 

[Alloy]

Road salt/dirt is a magnet for condensation. I've seen voltage leak 3" through the salt/dirt mix.

Coat the connections with Tef-Gel or NOALOX as well as the cable seals/ grommets/orings.
Fuses aren't waterproof. I've had them turn green inside.

 

[dstefan]

Bluesea does make sealed switch panels designed to be out in salt spay. They have IP 67 or 68 versions. Look at their website. There are multiple ones.