DC Battery Runtime Estimator

Estimate runtime, depth-of-discharge, and battery bank size.

Bank capacity (Ah)Bank voltage (V)Draw (W)Depth of discharge (%)

Result

Usable Wh

1020

Runtime

6.8 h (408 min)

About this tool

Pick battery chemistry, enter amp draw and temperature, and get the predicted run-time plus a recommended bank Ah for a 50% DoD target. A go-to for the persistent r/OffGrid and r/Solar 'how long will my battery last' questions.

Related tools

More engineering you might find useful.

Voltage Drop Calculator

Compute the percentage drop across a feeder or branch circuit quickly.

Wire Size & Ampacity Sizer

Find the conductor and OCPD size for any continuous load.

Conduit Fill Calculator

Validate raceway fill against the 40% rule and Chapter 9 tables.

Other categories

Looking for something different? Browse the rest of the catalog.

Suggest a tool