Voltstorage is shutting down after raising €66m for iron salt battery tech
28 aug. 2025
08:47
Voltstorage is powering down.
Founded in 2016, the Munich-based company raised a total of €66m for its iron salt battery, designed to store renewable energy for extended periods.
The company is now slowly winding down its operations to avoid bankruptcy after it failed to raise a new round of funding, a source at the company tells Impact Loop.
John Alper, Voltstorage's principal technologist, says the business faced "many headwinds."
Founded in 2016, the Munich-based company raised a total of €66m for its iron salt battery, designed to store renewable energy for extended periods.
The company is now slowly winding down its operations to avoid bankruptcy after it failed to raise a new round of funding, a source at the company tells Impact Loop.
John Alper, Voltstorage's principal technologist, says the business faced "many headwinds."
Update (Thursday 28 August: 11:57 CET): This article was updated to include key information from a new source.
German battery startup Voltstorage is shutting down, almost a decade since it launched with big plans to commercialise its iron salt batteries.