How this works

Watts (W) measure how much power your system is drawing at one moment. Watt-hours (Wh) measure how much stored energy a battery has. A power station with a 2,000 Wh battery running a 500 W load delivers roughly four hours of runtime before losses.

A speaker rated at "1,000 W" is describing peak amplifier output, not the wall draw of the system. Real measured power at the outlet is almost always far lower than the sum of nameplate ratings on your gear.

For the most accurate result, measure your system during normal use with an inline watt meter and enter that value. Idle measurements tend to understate real performance draw.

Runtime is approximately battery Wh × usable factor / load watts. The usable factor accounts for inverter overhead and the portion of the battery you can safely discharge. We use 0.85 as a sensible default and apply a 25% capacity reserve on top of that when sizing.

We only recommend specific models that Performance Carts has vetted and added to our database. No outside product listings, scraped specs, or shopping results are used. If nothing in our database matches, the tool tells you that directly and still shows the numerical requirements.

Confidence describes the quality of your input, not whether the result is favorable. A performance-time measurement is high confidence. A rehearsal measurement is medium-high. An idle measurement is medium because real draw is usually higher. Missing or invalid input is low / incomplete.

This first release sizes one power station for your system. Multi-station planning — splitting a load across two or more units — is on the roadmap and will appear in future modes.