Battery storage became the fastest-growing power technology in 2025, with lithium-iron phosphate batteries taking a massive lead in the global market. According to the authors of the newly released report, this specific battery type now accounts for nine out of every ten new installations worldwide.
“Battery storage is the fastest growing power technology today. In 2025, 108 GW of new battery storage capacity was deployed worldwide… Lithium‑iron phosphate (LFP) batteries now account for around 90% of deployments.”
This surge in storage capacity means that the world is installing massive amounts of battery power to support the energy grid. While there are several ways to store electricity, one particular battery chemistry is dominating because it is more affordable and durable for everyday use than the versions typically found in electric cars. Most of these installations are massive projects run by power companies, though smaller systems are increasingly being used to protect data centers and homes from blackouts.
The report “Global Energy Review 2026” was published by the International Energy Agency in France in April 2026. Prepared by the IEA’s Energy Modelling Office under the direction of Laura Cozzi, the comprehensive study was led by authors Alex Martinos and Thomas Spencer.
