Installation of energy storage systems in existing photovoltaic installations

Summary

This tender concerns the supply and installation of energy storage systems in existing photovoltaic installations across multiple sites in Kolno, Poland. The work includes delivery and installation of energy storage units (primarily 25–30 kWh, and 18–30 kWh variants) and, where required, replacement of non-hybrid inverters with hybrid inverters compatible with the storage system and the PV installation. The project covers multiple sites (city hall, schools, bus station, water treatment and wastewater pumping facilities) with a completion target of 30 November 2026. Tender evaluation is based on two criteria: price (60 points) and warranty period (40 points).