BESS battery energy storage system

Summary

The tender covers the design, supply, installation, commissioning and maintenance of a BESS battery energy storage system for the Törnäväntie campus in Seinäjoki under a turnkey contract. The system must be integrated into the building's electrical system and configured for reserve and electricity-market use. The procurement has two lots: Lot 1 for a system with at least 250 kVA charging and discharging power and at least 500 kWh capacity; and Lot 2 as an alternative with at least 90 kVA and 200 kWh, a five-year operation, maintenance and service period, and a five-year warranty. The submission deadline is 18 September 2026 at 10:00 UTC.