Tesla reported company-high energy storage deployments and revenue growth in 2025 but expects “low-cost competition” and policy factors to affect margins this year.

The UK market saw strong interest and activity in 2025 but now appears to be shifting from a development market to one focused on execution, writes Solar Media analyst Charlotte Gisbourne.

Tesla and Sungrow continue to top the Battery StorageTech Bankability Ratings Report, which also shows how revenue, profitability and shipments are trending in the industry, writes Solar Media Market Research analyst Joe Hennessy.  

The UK grid-scale battery storage market grew 45% in 2025, with 4GWh coming online during the year, bringing total operational capacity to 12.9GWh.