Energy Dome, the CO₂ battery made in Piacenza

The large domes containing compressed CO₂, Energy Dome’s proprietary energy storage system patented under the name ‘CO₂ Battery’, are being built in Piacenza, at the plant officially opened today, 8 October 2026.

‘The opening of the new site marks a strategic step in the industrialisation of the CO2 Battery’ is the theme of the day. The strategic value of the Piacenza site lies in its role as a central manufacturing hub: it is here, in fact, that key components of the technology – such as the domes (dome) – intended for the company’s large-scale international plants take shape.

The first dome, manufactured entirely in-house at the new plant, has already been shipped to India for the 160 MWh Kudgi project with NTPC, India’s leading electricity generator. Meanwhile, production is currently underway on the dome for the Columbia Energy Storage Project in Wisconsin (USA), also with a capacity of 200 MWh, developed in partnership with the long-established American utility Alliant Energy. Next, production will support the 200 MWh Rhode project in Ireland, an initiative that forms part of a long-term partnership with Google aimed at implementing CO2 Battery technology on a large scale across multiple continents.

The Mountain View giant is perhaps the biggest name amongst those with whom Energy Dome collaborates (Google is also one of its investors). A list spanning the globe, from Europe (Engie) to the US (one of the most recent agreements being with Salt River Project, a non-profit public electricity company serving the Phoenix metropolitan area), to India, as mentioned, and Australia (it has recently launched a partnership with SEC, a public renewable energy company in the state of Victoria).

Energy Dome was founded in Milan in February 2020 by Claudio Spadacini, Dario Rizzi and Francesco Oppici. Today, it has over 2 GWh of projects in operation or under contract worldwide, over 3 GWh of authorised projects and a development pipeline exceeding 30 GWh.