Mobile Solar Power Made Easy!: Mobile 12 volt off grid solar system design and installation. RV's, Vans, Cars and Boats! Do-it-yourself step by step instructions

But a fuse can only work if it is attached to a wire that is large enough to carry enough current to “blow” the fuse. If the wire is too small, or if the fuse is too large for a wire, the fuse will not blow.

Wires that supply electricity to appliances are typically 12 gauge.

Improper size connector: all connectors are rated for a specific gauge of wire and no other.

-500 watt inverter requires 10 gauge -1000 watt inverter requires 4 gauge

I personally like to use 6 gauge wire here for a 40 amp controller.

If you would like to wire the fuse block directly to the large bolt-on fuse that is located on the battery bank, you need to use a thick wire. This wire should be at least 6 gauge.

Now we can attach the final fuse to the battery bank, which is the fuse block. This will house multiple fuses so that you can power your appliances.

There should be a large bolt-on fuse on the positive lead of your battery bank that connects to the inverter and fuse block, and any other large appliances you plan to connect to the battery bank.

Use a switch that is rated for whatever amperage you plan to use it with.