Observed arrival · 2026-09-01
The Home Battery Backup Calculator
An independent planner estimates battery runtime, required capacity, unit count, power limits, and solar-supported outage scenarios.
Field notes
The planner models household circuits individually, including running and startup wattage, daily hours, duty cycle, and quantity. It separates stored energy from inverter output, then applies reserve, efficiency, derating, and planning-buffer settings to estimate runtime and required units. A solar mode extends the model across a 1–7 day horizon, while named battery presets are enabled only when explicit usable-energy data is available. The page also provides Method, Sources, About, Privacy, Terms, and Contact sections.
Observed signals
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Editorial observations of this landing page, not a rating.
One card from the complete issue