How do I count emissions for a storage system built from second-life EV batteries?
Reusing EV batteries avoids making new cells, the biggest part of a battery's footprint. Decide how to split the original manufacturing emissions between first and second life, state the rule, and add testing, repacking and transport. The storage itself only shifts electricity use.
Common allocation choices
- All manufacturing emissions to the first life, so second life carries only repurposing.
- A split by remaining capacity or years of service.
What to add
- Testing, sorting and new battery management electronics.
- Transport and enclosure.
- Round-trip losses while operating (Scope 2).
What Senseible does here
Senseible reads bills, fuel invoices and production records into dated, fingerprinted records, so the figure you send a buyer can be traced to its documents.
Sources: GHG Protocol standards, including the Product Standard, GHG Protocol Scope 2 Guidance, International Energy Agency
Last reviewed 2026-10-22.