Terna’s 2028 Capacity Rules Reset Battery Value in Italy
Italy’s new capacity-market rules are repricing batteries, cutting accredited value and making market design the key driver of storage returns.
Updated
What is this trend?
Terna’s 2028 capacity-market rules lower accredited value for batteries, making market design and compliance more important than hardware alone in Italy’s storage economics.
- 4-hour batteries drop to 53% accredited capacity under the new curve, from 67%.
- Island zones face even lower capacity value, widening regional economics gaps.
- Italy’s decree adds limited delivery flexibility, but the bigger shift is rule-driven repricing.
- Storage returns now depend more on accreditation, controls, and market access than nameplate size.
What’s the latest?
Terna’s 2028 capacity-market methodology sharpens the repricing already underway: a 4-hour battery now earns 53% accredited capacity, down from 67% under the prior curve, with even lower value in island zones.
How it developed
- Curtailment Drives Two-Hour BESS Procurement, Storage Turns Contracted, and Supply Chains Regionalize
- Storage Monetization Is Shifting From Merchant Arbitrage to Contracted Infrastructure
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