Technology provider Polar Night Energy and utility Lahti Energia have partnered for a large-scale project using Polar’s ‘Sand Battery’ technology for the latter’s district heating network in Vääksy, Finland.

In a major week for European BESS deal-making, project acquisition and financing deals have been done in the Poland, Germany, Finland, the UK and Romania for grid-scale projects totalling well over 1GW of capacity.

Two Finland BESS project announcements, with Exilion ordering grid-forming energy storage technology from Merus Power and Nala Renewables ordering units from Sungrow for 2-hour systems.

A flurry of grid-scale BESS project progress totalling more than a combined 1.5GWh in the past week, from Renalfa in Bulgaria, Engie in Romania, Nala Renewables in Finland and Metlen in Greece.

Chinese lithium-ion OEM Hithium and system integrator BOS Power have signed a supply agreement for 3GWh of BESS deployments in the Nordic region.

Developer Winda Energy will put a 30MW/60MWh BESS in Finland into operation next year, built with technology supplied by European companies.

Developer Merus Power has delivered and commissioned a 38MW/43MWh battery energy storage system (BESS) in Lappeenranta, Finland.

Developer Ilmatar and investor Nuveen Infrastructure have put a 30MW/41MWh BESS in northern Finland into commercial operation.

A district network heating operator in Finland has commissioned a 1MW/100MWh thermal energy storage project using novel ‘Sand Battery’ technology from Polar Night Energy.

Owner-operator Eco Stor has connected what it claimed is the largest BESS in Germany to the grid, while its former majority owner is going to build a BESS in Finland.