CampPowerCalc

Calculate exact battery + solar for your van build

2 votes·1 comment·Jun 19, 2026

About

Stop guessing your van power needs. CampPowerCalc is a free electrical calculator with 30+ real appliances. Get daily Wh, battery size, and solar wattage in one click. Features: real appliance database, inverter loss calculation, 20% safety buffer, alternator charging guidance. No signup. No email capture. No affiliate links. Built by a van builder tired of lead-gen calculators pretending to be free.