South Somerset Council say it expects to start selling power back to the National Grid from March.
Last month we told you the giant batteries - which will store spare energy - have arrived in the county.
The money raised will be used to help fund public services.
Council leader Leader Val Keitch say other authorities are watching what happens closely
Henry Hobhouse, the council's portfolio holder for property and income generation, said: "I am extraordinarily proud and excited to be able to deliver such an important project.
"We have a vital role to play in caring for our environment and to be able to combine this with our new commercial approach which will see us protect services and become more financially self-sufficient is a great achievement."
The council, in partnership with Somerset-based Opium Power Limited, is creating a new 25MW Energy Storage facility near Taunton to provide essential power management assistance to the National Grid.
It will be the largest council-owned battery storage system in the UK and comes as a result of £9.8M of South Somerset District Council investment.
Councillor Hobhouse added: "This investment project will bring regular revenue into the council to help continue to provide services to our communities as well as help the region to supply a consistent supply of green energy through the national grid for the future."