Observed arrival · 2026-11-12
Watt & Hour’s runtime meter
A calculator and guide library for estimating what portable power stations can keep running.
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$Paid
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✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Portable power station owners planning backup loads
- Worth noticing
- The calculator uses an 85% efficiency factor and labels its results estimates, not promises.
Field notes
The page pairs its calculator with appliance-by-appliance load examples for keeping a fridge and lights on, running a CPAP overnight, or working from home during an outage. Its guide list includes a sump-pump sizing example with continuous and surge wattage, plus a Canadian winter comparison covering five stations' cold limits.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
◎NicheUnusually specific use
ƒJavaScriptBrowser-side code central
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