About this calculator

Bank Wh = daily load × days of autonomy ÷ depth of discharge ÷ inverter efficiency. Lithium typically allows 80% DoD vs 50% for lead-acid.

Frequently asked questions

What does the Battery Bank Sizing Calculator do?

Battery storage to cover overnight or off-grid loads. Bank Wh = daily load × days of autonomy ÷ depth of discharge ÷ inverter efficiency. Lithium typically allows 80% DoD vs 50% for lead-acid.

Is the Battery Bank Sizing Calculator free to use?

Yes. Every calculator on Calcurly.com is free, works in your browser without sign-up, and can be embedded on your own website.

How accurate is the Battery Bank Sizing Calculator?

Results are calculated in real time using industry-standard formulas. Treat the output as a well-informed estimate — always cross-check with local regulations, product datasheets, or a qualified solar & renewables professional before committing to a purchase or a job.

What inputs does the Battery Bank Sizing Calculator need?

Enter values for: Daily load (kWh), Days of autonomy, Depth of discharge. Sensible defaults are pre-filled where possible so you can start with a single change.

Can I embed the Battery Bank Sizing Calculator on my own website?

Yes — copy the iframe snippet at the bottom of this page, or use the Embed Generator to customise the size. The embedded version stays in sync with the live calculator on Calcurly.com.