Italy-based Energy Dome and US non-profit utility Salt River Project have agreed to add a 19-megawatt, 10-hour battery system to Arizona grid, under a 20-year tolling scheme, according to a joint statement on Monday.
The project, which is also a collaboration between SRP and Alphabet's (GOOGL) Google, will be co-located on the site of Coronado Generating Station in St. Johns, Arizona, according to the report.
Energy Dome will own and operate the facility, while SRP will dispatch the output. Google, through a cost-sharing agreement with SRP, will fund a portion of the project.
The companies expect the facility to come online in 2029.
Energy Dome, a provider of capacity solutions for utilities and artificial intelligence infrastructure, will use its carbon dioxide battery and long-duration energy storage process to develop the project.
SRP said adding energy storage is part of its broader strategy to "at least double the number of generating resources on its power system by 2035 to meet increasing energy demand in the Phoenix metropolitan area."