How it works
Autonomy days = battery energy × usable fraction × efficiency ÷ daily load.
Input definitions
- Battery nominal energy (kWh)
- Enter the value in the labeled unit.
- Usable depth (%)
- Enter the value in the labeled unit.
- Delivery efficiency (%)
- Enter the value in the labeled unit.
- Daily load (kWh)
- Enter the value in the labeled unit.
A worked example
- Battery nominal energy (kWh)
- 15
- Usable depth (%)
- 80
- Delivery efficiency (%)
- 90
- Daily load (kWh)
- 6
Assumptions & limits
Uses only the values entered. Rates are illustrative inputs, not live quotes, legal rules or personalised advice. Check provider terms, local requirements and measurements before acting.
Sources & review
Maintained by AnsRio. Methods and examples use automated checks; this does not imply independent professional certification.
Method updated 2026-10-19. Content checked against the stated method and examples. Our verification approach.
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Common questions
Does this include solar generation during the outage?
No. It shows battery-only autonomy. Add generation with a time-based energy model.
How does Solar battery autonomy days calculate the result?
Autonomy days = battery energy × usable fraction × efficiency ÷ daily load.
What should I verify before using Solar battery autonomy days?
Uses only the values entered. Rates are illustrative inputs, not live quotes, legal rules or personalised advice. Check provider terms, local requirements and measurements before acting.