Observed arrival · 2026-10-29
BackupCalc’s outage-planning calculators
A free browser-based set of calculators for estimating power-station runtime, battery and inverter size, and solar recharge time.
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- For
- People planning household backup power
- Worth noticing
- The sample load combines six appliance types and estimates 8 hours 4 minutes at a displayed 108 W average load.
Field notes
The runtime example exposes its assumptions, including 85% efficiency and a 1,024 Wh battery, rather than presenting a number without context. The appliance reference distinguishes average use from running watts and notes that compressors cycle on and off; model entries cover products from Anker, Bluetti, EcoFlow, and Jackery.
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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