Tools

Bob & Doug's Off-Grid Power & Water Calculator

$4.99

List what you run and how long you run it, and it sizes the solar array, the battery bank, the inverter and the water tank — with three presets for weekend camping, van life and an off-grid cabin.

Instant digital download
Original, made in-house by the Dudes
No shipping, no waiting, no dudes mailed

Bob says:

"The fridge is a load, bro. That is why the lights go dim."

Doug says:

"Size the bank for the cloudy days, not the sunny ones."