About the Second-Life Value

Second-life value analysis estimates the residual economic value of retired EV or stationary battery packs — typically cells that have degraded to 70–80% of original capacity — when repurposed for less demanding stationary energy storage applications like solar backup, off-grid storage, or low-cycling C&I applications.

How to calculate it

1. 1Assess the battery pack's remaining health: State of Health (SoH) test — capacity test vs nameplate. Second life is practical for packs at 70–80% SoH.
2. 2Evaluate use-case compatibility: second-life packs have reduced power capability and unknown remaining cycle life. Match to low-C-rate, low-cycling applications.
3. 3Cost the second-life system: pack purchase/acquisition cost + BMS refurbishment + integration + installation. Target cost < 60% of equivalent new BESS.
4. 4Estimate remaining cycle life: if the pack has used 60% of its first-life cycle budget at 80% DoD, the remaining cycles at a shallower 50% DoD may be substantial.
5. 5Compare LCOS of second-life system to new BESS and to the application's value (backup power rate, ToU spread).

Worked example

A retired EV pack (60 kWh nameplate, 80% SoH → 48 kWh usable) acquired at ₹8 L, BMS + integration ₹3 L → total ₹11 L for 48 kWh = ₹22,900/kWh. New LFP BESS: ₹35,000–45,000/kWh. Second-life LCOS at 500 remaining cycles: ₹11 L ÷ (500 × 48 × 0.85) = ₹5.4/kWh delivered — potentially viable for low-cycling backup.

What you can calculate

• Residual value ₹
• 70-80% capacity
• Repurpose ROI
• Recycle value

Frequently asked questions