RigWatt turns your appliance list into a complete electrical build — battery amp-hours, solar wattage, inverter size, wire gauge, and fuse ratings — with a printable spec sheet you can take shopping.
One-time payment · Use it as many times as you want
Know the exact usable amp-hours you need — accounting for LiFePO4 or AGM depth-of-discharge and your days of autonomy — so you never overspend or run flat.
Get the solar wattage that actually recharges you for your sun-hours, plus a continuous + surge inverter rating matched to your biggest AC loads.
Correct DC wire gauge for your run length and current, plus properly-rated fuses and breakers for battery, inverter, and solar circuits — no fire hazards.
Pick from the built-in library or add custom loads with wattage, voltage, and hours of use per day.
Set your battery type, sun-hours, and system voltage — RigWatt instantly computes your full electrical spec.
Download a printable build sheet with your component list and take it straight to the store.
No. RigWatt works instantly in your browser — no account, no download, no setup. Open it and start calculating right away.
Yes. You choose your system voltage and battery chemistry (LiFePO4 or AGM), and all amp-hour, wire gauge, and fuse recommendations adjust accordingly.
Not at all. You just enter what you'll run and how long. RigWatt does the math and explains each result in plain language on your spec sheet.
Skip the forum guesswork and expensive mistakes. Get your complete electrical spec in minutes.
Get Instant Access — $19Works instantly in your browser — no account needed