Led · Series A · Aug 2025

Palmer Energy Technology (PETL) develops automotive-grade battery energy storage systems and has announced the acquisition of Brill Power to embed cell-level battery control software across its product line. The combined business aims to improve safety, efficiency, and lifecycle performance for applications ranging from electric buses to grid-scale storage. Brill Power’s software actively manages current at the individual cell level and is engineered and validated in the UK, with operational data stored on UK-based servers. Brill Power will operate under PETL for integrated systems while retaining its brand for module sales to third-party partners. The company is using the transaction and accompanying funding to scale UK operations, enhance domestic assembly, and shorten supply chains to better serve strategic customers such as FirstGroup. PETL’s CEO Andy Palmer said the acquisition gives PETL a leading position in BESS technology and will accelerate development of next-generation control systems.