Battery energy storage system (BESS) developer TagEnergy has announced the energisation of its latest BESS project, a 49.9MW/99.8MWh BESS in the east of Scotland.
The Pitkevy BESS is located near Fife, and is the sixth project that the developer has energised since entering the UK BESS market in 2021. TagEnergy acquired the Pitkevy BESS project from the ILI Group in October 2022 and fully owns the facility; the developer reached financial close on the Pitkevy BESS project in February of last year, having secured a non-recourse green loan package of up to £70 million from Santander UK, Rabobank and Triple Point.
For this BESS project, the battery units were supplied by Tesla, which delivered 27 Megapack 2 XL battery systems, with Flexitricity serving as the route to market and battery optimiser and RES serving as asset manager. According to the developer, the Pitkevy facility is TagEnergy’s first split-contract project; RJ McLeod completed site works and battery container installation for the development.
In a post announcing the energisation on LinkedIn, the company describe the energisation as “another important step in bringing more renewable power to more people, and more stability and flexibility to the UK grid, as we continue our mission to accelerate the energy transition.”
TagEnergy has a connected operating portfolio of 320MW in the UK, and also has assets in Spain, Australia, France and Portugal. The company saw two significant UK energisations take place last year; one of which is the 49MW/98MWh Jamesfield project, a standalone BESS development developed as a joint venture between TagEnergy and Harmony Energy and located near Abernethy, Scotland.
This development also uses Tesla lithium-ion batteries, utilising the 2-hour duration Tesla Megapack batteries as well as Tesla’s Autobidder AI software.
Later in 2024, the company energised what it claimed was the UK’s largest transmission-connected BESS development, the 100MW/200MWh Lakeside project near Drax, in North Yorkshire. Tesla Megapack 2 XL lithium-ion batteries were also used for this development, which was successfully energised in October of 2024, having begun construction in August 2023.
TagEnergy purchased a 100% stake in the Lakeside project from RES in December 2021, in a deal worth £65 million (US$85 million); Habitat Energy serves as the optimiser for the Lakeside project. In November 2024, grid operator National Grid announced that it had successfully upgraded the nearby Drax substation in order to accommodate the connection of the Lakeside BESS.
