Tools & Calculators

Power Planning Calculators

Skip the spec-sheet math. Answer a few questions and get a clear estimate for every part of your backup power plan.

4 calculators - always free

Battery Runtime Calculator

Estimate how long a power station or home battery can actually run your devices, accounting for real-world efficiency losses.

Find the right generator size for your home so you can run what matters without overspending.

Estimate how many hours your stored gas or propane can keep a generator going.

Size a battery backup that keeps your sump pump running and your basement dry.

We are always working on practical new calculators to make home power planning clearer, faster, and easier.