Off-Grid Solar Calculator
Check the things you run, adjust how many and how many hours a day, and we'll estimate your daily power use and the solar panels and batteries to cover it. Great for a ballpark before you talk to an installer.
1. What do you run?
🔋 Your estimated system
Daily power use—
Recommended solar array—
≈ 400W panels—
Battery — lithium—
Battery — lead-acid—
Lithium batteries can be drained deeper (about 80%) than lead-acid (about 50%), so you need less lithium capacity for the same backup. The cheapest power is always the power you don't use — efficient appliances shrink the whole system.
Rough planning estimates using common rules of thumb (about 75% system efficiency). They are not a substitute for a professional load analysis and design. Have batteries and wiring installed by a qualified pro and follow local codes.
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