Engineering firm SPIE and Tesla have signed a three-year agreement to expand their collaboration on battery energy storage systems across Europe. The deal covers ongoing projects including a major 1.4 GWh facility in the Netherlands. It aims to streamline deployments using Tesla's Megapack technology without setting volume targets.
Pan-European company SPIE, headquartered in France, announced on December 15, 2025, a framework agreement with Tesla to build on their existing partnership in battery energy storage systems (BESS). The three-year deal, with an option to renew, applies to all SPIE subsidiaries in Europe and defines the legal and operational conditions for deploying Tesla's Megapack technology.
Key projects under this collaboration include the 1.4 GWh Mufasa BESS in the Netherlands, valued at $366 million, which will feature 372 Tesla Megapacks and become the largest such facility in the country. SPIE is overseeing engineering and execution for this initiative.
In France, the partners are working on a 100 MW/200 MWh BESS project, where construction began in September 2025. Commissioning is scheduled for the end of 2026, including the building of a 90 kV substation for grid connection.
A third project in Belgium involves a 50 MW/200 MWh BESS utilizing 53 Tesla Megapacks.
The agreement facilitates international coordination, reduces contract negotiation times, and promotes scaling of deployments, according to SPIE. It reflects confidence in SPIE's technical skills and pan-European organization, the company stated. SPIE provides end-to-end services, including engineering, procurement, and construction (EPC) as well as balance of plant (BoP), positioning it as a key player in Europe's energy transition.
Tesla's Megapacks are used globally in BESS projects, with the latest generation unveiled in September 2025 at RE+ in Las Vegas. This partnership underscores efforts to integrate renewables and enhance grid stability through intelligent storage solutions.
