OpenSolar vs Solar System Calculator

OpenSolar is the world's first free, end-to-end, solar design and sales application.

Work out the solar power system for your home, cabin, RV or farm — for free. Add your devices to Solar System Calculator and instantly see how many panels, how much battery and what size inverter you need. No electrical background required; results are clear and simple. ADD YOUR DEVICES • Ready-made templates: fridge, chest freezer, water pump, TV, router, security camera and more • Enter the yearly consumption from the energy label (kWh/year) • Daily consumption and peak load are calculated instantly SEE YOUR SYSTEM • Number and rating of panels, battery capacity and layout • Hybrid inverter with built-in MPPT • Days of autonomy, depth of discharge, temperature and losses • Energy flow and consumption breakdown charts • Estimated system cost • 20 country/region profiles: currency, grid voltage and peak sun hours UNLOCK WITH A SHORT AD • Installation sizing: wire sizes, voltage drop, protection and material list • Payback analysis: payback period, net present value and cash flow • Proposal PDF: cover, summary, device list, installation and payback pages Unlocked sections stay open until you close the app. FREE VERSION • Up to 2 projects • Banner ad at the bottom of the screen • PDFs carry a free-version note; the A3 single-line diagram is in Pro For no ads, unlimited projects and proposals with a single-line diagram, get Solar System Calculator Pro on the App Store. 16 languages, dark mode and a larger text option; works on iPhone and iPad. Note: Results are a preliminary sizing. Talk to a licensed electrician before installing. Support: support@3dscada.com