PVTIME – Grid-scale battery storage projects in the UK have reached a new milestone, with the total approved capacity now standing at 77.9GW/162.5GWh. This follows the approval of almost 4GW of grid-scale projects in October. These figures come from Solar Media Market Research’s ESN/PV Tech report, ‘Battery Storage UK Project Pipeline & Operational Assets Database’.
Central and local authorities approved 1,358MW/3,700MWh of projects in October, the highest monthly intake of large-scale systems since July, when around 5GW/10GWh was granted consent. Key approvals included Qair UK’s 342MW Red Moss project in South Lanarkshire and Evolution Power’s 165MW Stonestreet Green solar plus storage scheme in Kent. Both projects were approved at a national level: the Scottish Energy Consents Unit approved the Red Moss project and the Energy and Climate Change Secretary, Ed Miliband, approved the Stonestreet Green project via a Development Consent Order.
Solar Media’s monthly ESN Premium series data, which runs until the end of the year, shows that 9,937MW/21,883MWh of large-scale storage is under construction. Scotland is in the lead with almost 6GW, half of which comes from three 500MW/1GW projects by Copenhagen Infrastructure Partners, a company profiled in depth by ESN Premium last year.
The UK’s largest project under construction is Fidra Energy’s 1,400MW/3,100MWh Thorpe Marsh scheme in South Yorkshire. This accounts for over half of the 2.4GW/5.2GWh Yorkshire and Humber pipeline and 23.6% of the national total, placing it second only to Scotland.
Operational grid-scale storage currently stands at 7,862MW/11,765MWh, with almost 2GW/3.5GWh having been added in the first ten months of 2025 alone. This represents a 36% year-on-year increase, with only two months remaining.
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