Build your off-grid electrical system with confidence! 🚐⚡
Planning the electrical setup for a campervan, RV, or boat is usually overwhelming. It means juggling complex spreadsheets, confusing formulas, and worrying about safety hazards like undersized wires.
VanPowerCalc is a free, completely offline-capable Progressive Web App (PWA) designed to simplify electrical planning for nomads and DIY builders.
✨ Key Features:
🔋 Battery Sizing: Calculate exactly how much battery capacity you need based on your daily appliance usage.
☀️ Solar Panel Sizing: Find out how many solar panels you need to keep your setup running off-grid indefinitely.
🔌 Cable Sizing: Safely determine the required wire gauge (mm² / AWG) and fuse sizes for your 12V appliances to prevent voltage drops or fire risks.
📶 Offline First: Works perfectly as an app on your phone, even when you're parked in the middle of nowhere without a signal.
🌍 Fully Free & Ad-Free: Built by a vanlifer, for the community.
Stop guessing and start building your mobile home safely. Try VanPowerCalc today!


