Defined term
Battery depth of discharge
Battery depth of discharge is the fraction or percentage of a stated battery capacity that has been withdrawn relative to a defined full condition.
Also known as DoD
measurement · Concept code GS-CONCEPT-047 · Last verified August 20, 2026
Evidence through 2023-12-01 · 0 sources have no source-event date
Content modified 2026-08-20
Definition and boundaries
Definition
Battery depth of discharge is the fraction or percentage of a stated battery capacity that has been withdrawn relative to a defined full condition.
Definition claim verification: Verified August 20, 2026
In plain language
When comparing Battery depth of discharge, keep the unit, time period, measurement boundary, and underlying assumptions the same on both sides.
What it is not
It is not round-trip efficiency and it is not the same as remaining state of charge without a declared convention.
Decision context
Why it matters
The capacity basis, state-of-charge convention, operating reserve, measurement point, and manufacturer limits must be aligned before comparing values.
Decision-context claim verification: Verified August 20, 2026
Information boundary
This page provides general educational context, not a site design, production guarantee, utility determination, contract interpretation, legal opinion, tax conclusion, or individualized financial advice. Verify property, equipment, utility, jurisdiction, program, and agreement details before acting.
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Learning navigation
Primary topic: Equipment
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Primary sources
- U.S. Department of Energy: Battery Energy Storage System Evaluation Method
Revision DOE/GO-102023-6083 · December 2023 · Source event as of December 1, 2023 · Ontology accessed August 20, 2026 · Ontology verified August 20, 2026