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

Typically a 4-8 gauge wire is recommended.

Battery bank voltage is only an estimate of the batteries current capacity.

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.

The wires that attach to these components are typically the largest wires in a system and will supply power to all appliances.

This is because the wire itself is becoming the fuse.

Big Appliance = Big Wire = Big Fuse

A 100 watt solar panel producing power for 3 hours will produce 300 watt hours

Water Hose Analogy: Current is similar to the rate of flow.

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.