Field-tested in real outages — not just a lab bench
Know exactly how much power you need.
Tell us what you want to keep running and for how long. We size the battery, the inverter, and the recharge — then show the real product range that fits. Free, no sign-up.
⚡ Real measurements — run-watts & surge tested on actual gear
🔌 Official sources — safety guidance checked against the CDC, USDA & Ready.gov
✓ Free & independent — no sign-up, no pay-to-rank
How it works
1
List what you need to power
Fridge, CPAP, router, sump pump, lights — and how long you need each to run.
2
We size it honestly
Battery, inverter, and recharge — using real duty cycles and surge, not inflated math.
3
See what actually fits
A capacity range and the real product class for your plan — never recommended for commission.
Free interactive calculators
Power-Station Sizing
Match battery + inverter capacity to your home, apartment, or RV.
Appliance Runtime
How long a station runs your fridge, CPAP, or sump pump.
Solar Recharge
Panels and sun-hours needed to refill your station off-grid.
Browse guides by topic
Outage Prep 44
Power Stations 43
Appliance Runtime 21
Generators 21
Why trust these numbers
Built on real measurements, not spec-sheet optimism.
Our runtime figures come from real measured watt-hours and surge, not spec-sheet optimism, and our safety guidance follows official sources like the CDC, USDA, and Ready.gov. We size for what actually keeps your essentials running, and we never recommend a product just because it pays more.
Build your outage plan in a minute.
Start with the sizing calculator — free, no sign-up. Save your plan and we’ll show the exact product range that fits.