AESC was established in Japan in 2007, and with the expansion of its manufacturing business around the world, it was eventually majority owned by China Vision Group. The company established a factory in Smyrna, Tennessee in 2012 to supply electric vehicle batteries to Nissan. AESC restructured its factory in 2025 to produce lithium batteries for fixed energy storage. AESC has always been a major supplier to Fluence, a large battery project developer and installer. Previously estimated, the annual production capacity of the Shimana factory was 3 GWh of lithium iron phosphate (LFP) batteries.

With the new Foreign Attention Entity (FEOC) requirement from the US government emphasizing restrictions on the installation of energy products with Chinese influence, many companies are transitioning ownership of their US factories.

Fixx Energy took over AESC's factory in Tennessee last month and signed a multi-year agreement to supply batteries to Fluence.

Jeff Juger, CEO of Fixx Energy, said, "With strong demand and a growing industrial base, there is a clear opportunity for the United States to expand its domestic energy storage manufacturing capabilities. Our factories are operating and are now leading the way. Fixx is ready for this moment.