Recent analysis from our Storage Index reveals that a 2-hour Battery Energy Storage System (BESS) in France could have earned up to €1.4 million per year if price conditions observed on April 15–16 had remained consistent throughout the year. This figure marks a substantial increase compared to the average €280k/MW annual revenue, based on the latest market data.

What drove this spike? During these two days, the French TSO encountered significant grid balancing challenges, leading to a sharp rise in ancillary services prices.

These are exactly the kinds of high-impact market dynamics that our Storage Index, powered by our in-house simulation tool COSMOS, is built to capture and analyze.

Interested in understanding the revenue potential of your BESS projects?
Visit our Storage Index page to explore the data in more detail
Or get in touch — we’d be happy to discuss your specific project needs.