With an investment of an estimated €47 million with European Union co-financing, this project includes the installation of two battery energy storage plants, one at the site of the Delimara power station and another in the underground tunnels beneath the Marsa Power Station, in the. With an investment of an estimated €47 million with European Union co-financing, this project includes the installation of two battery energy storage plants, one at the site of the Delimara power station and another in the underground tunnels beneath the Marsa Power Station, in the. The government has received 16 offers for the development of Malta's first large-scale utility battery energy storage systems, Minister for the Environment, Energy and Public Cleanliness Miriam Dalli told The Malta Independent. Interconnect Malta had launched the procurement process for the design. Interconnect Malta announced that preparations are underway for Malta to have the first two large scale Battery Energy Storage Systems that store electrical energy, so that Malta can invest in more renewable energy sources in the coming years. Malta's long-duration energy storage solution is already being deployed.