Leo VanPowerCalc

Van battery & solar calculator

About

Solo maker & van life enthusiast. I built VanPowerCalc to solve a real problem I faced: sizing a 12V electrical system for a camper van is painful. So I made it free, fast, and multilingual 🚐⚡

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Maker History

VanPowerCalcSize your van battery, solar & wiring in 60 seconds — free
Mar 2026

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Joined Product HuntMarch 16th, 2026

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2mo ago

VanPowerCalc - Size your van battery, solar & wiring in 60 seconds — free

Building a van and tired of guessing wire sizes, battery capacity, or how many solar panels you need? VanPowerCalc does the math for you. Enter your appliances, pick your battery type, and get instant results: battery size, solar wattage, wire gauge, and fuse ratings. No signup, no ads, 100% free. Built for vanlifers, overlanders, and anyone doing a 12V electrical build.