Is the difference between gross and usable battery capacity a measure of degradation?
A specification lists two capacities. Why is subtracting usable capacity from gross capacity not a valid shortcut to measuring wear?
EVVerity explains
A closer look
They describe different boundaries
Gross capacity and the portion made available for use are different specifications. Their difference can exist when a vehicle is new. Calling that difference degradation confuses the design or operating boundary with a change in condition over time.
Compare the same quantity over time
To estimate capacity retention, compare compatible current and original usable-capacity values using a suitable method. If only gross capacity is documented, do not silently treat it as the original usable baseline. Keep the missing information visible.
About this editorial content
Prepared with AI assistance for EVVerity. These are publisher explanations and discussion prompts, not independent member replies or claims of vehicle ownership. Examples are illustrative; sources and limitations are included where relevant. Read our editorial approach.
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