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Inverter Fuse & Wire Calculator
Calculate the correct fuse size and cable gauge for safe inverter installation in your campervan
Cable Calculator
Total one-way cable run from battery to inverter
Safety Guidelines
Why Correct Sizing Matters
Undersized cables can overheat and cause fires. Undersized fuses won't protect your system. This calculator uses UK standards and includes a 1.25x safety factor.
Voltage Drop
We calculate for maximum 3% voltage drop, which is industry best practice. Lower voltage means less efficiency and can damage sensitive electronics.
Cable Standards
- • Use flexible marine-grade cable (e.g., tinned copper)
- • Ensure proper termination with crimped lugs
- • Mount fuse within 500mm of battery positive
- • Use ANL or MEGA fuses for high-current applications
Important
This calculator provides guidance only. Always consult a qualified electrician for your specific installation. Incorrect wiring can be dangerous.