Arvee AmpSmart

Understand your RV electrical system with Arvee AmpSmart — the most comprehensive free RV power calculator available. Whether you're plugged in at a campground, dry camping off-grid, or planning a battery and solar upgrade, AmpSmart helps you make informed decisions about your RV's electrical system. THREE CALCULATION FLOWS: Shore Power Check — Will running these appliances trip my breaker? • Analyze 15A, 20A, 30A, and 50A hookups • See total load vs. available capacity at a glance • Get warnings for overloads, surge/startup risks, and the 80% continuous load rule • Understand shared circuit limitations on household outlets Off-Grid Power Budget — How long can I last on battery and solar? • Model your battery bank by chemistry (Flooded Lead-Acid, AGM, LiFePO4) with accurate depth-of-discharge and efficiency factors • Add solar panels with location and season-based peak sun hour presets • Factor in generator support, inverter efficiency, and cold weather derating • See daily consumption breakdowns, endurance estimates, and solar balance System Builder — What battery, solar, and inverter setup do I need? • Set your off-grid goal (days between charges) and let AmpSmart size the system • Compare battery chemistries side by side (capacity, cost, weight, lifespan) • Get solar, inverter, and charge controller recommendations for your location • Enter your existing system to see exactly where it falls short REAL-WORLD RV APPLIANCE LIBRARY: • 37 curated presets with practical power values (A/C, microwave, fridge, CPAP, Starlink, and more) • Three usage modes per appliance: hours/day, minutes/day, or duty cycle % • Add custom appliances for anything not in the library • Surge/startup wattage tracked separately for compressor-based loads LEARN AS YOU GO: • Contextual help articles at every step explain watts, amps, battery chemistry, solar peak sun hours, inverter efficiency, and more • Built for RVers who want to understand their system, not just get a number SHAREABLE REPORTS: • Generate a branded Power Profile Report from any calculation • Share with others or download as a file FREE & PRIVATE: • Completely free — no ads, no in-app purchases, no paywalls • No account required — just open and calculate • No personal data collected — your information stays on your device • Works offline — no internet connection needed Made with care by Arvee — the RV trip planning platform that helps RVers stay connected with friends on the road.