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Solar Sizing Calculators

The most expensive way to build an off-grid system is to size it wrong. You buy underpowered gear, it fails, and you buy the right sized components the second time. These three free calculators use the exact math from my paid design work to give you your target specs right the first time. Pick your build style below.

Portable/Camping

Portable Power Station Sizing

Figure out the exact watt-hours and output rating you need before you buy. Instead of guessing between a 500Wh and a 2000Wh unit.

Off Grid/Cabin/Van

DIY Solar Kit Sizing

Size a full off-grid solar kit comprising panels, storage, and an inverter around your actual daily loads and local sun hours

Advanced/Custom Builds

Battery Bank & PV Array Sizing

Pick your voltage and get an exact battery count and series/parallel wiring layout, plus a matching array size.

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