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Calculators

The parts of off-grid camping that are arithmetic, not opinion. No signup, live as you type, and nothing you enter leaves your browser. More are coming; the ones that are not built yet are listed below so you know what is missing.

RV Solar Calculator

Daily watt-hours, your real sun hours, and panel size in. Panels and battery amp-hours out, with the working shown.

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Generator Sizing

Tick what you run. The startup surge on the biggest motor decides your wattage class, not the running total.

Open calculator →

Battery bank sizing

Usable amp-hours by chemistry, temperature, and how many days you want without sun.

Coming soon

Trip fuel cost

Route miles and your real mpg against current fuel prices.

Coming soon

Tank duration

How many days of fresh water and tank capacity you actually have at your usage.

Coming soon

Towing check

Payload, tongue weight, and GCWR against what you are actually hauling.

Coming soon

These are planning estimates built from the numbers you enter plus stated assumptions, not a system design. For anything involving electrical work, propane, or generator exhaust, get a qualified installer to check it. Bad power decisions burn things down and bad exhaust decisions kill people.