99MW/198MWh BESS energised as Harmony Energy and Fotowatio Renewable Ventures continue partnership

LinkedIn
Twitter
Reddit
Facebook
Email

Harmony Energy and Fotowatio Renewable Ventures (FRV) have completed another joint project, energising a 99MW/198MWh battery energy storage system (BESS) in Essex.

The Clay Tye project operates 52 Tesla Megapack lithium-ion batteries, each with a capacity of 198MWh, connected to the UK Power Networks’ distribution network. The project also uses Tesla Autobidder AI software for energy capacity sharing.

This article requires Premium SubscriptionBasic (FREE) Subscription

Enjoy 12 months of exclusive analysis

  • Regular insight and analysis of the industry’s biggest developments
  • In-depth interviews with the industry’s leading figures
  • Annual digital subscription to the PV Tech Power journal
  • Discounts on Solar Media’s portfolio of events, in-person and virtual

Or continue reading this article for free

Both Felipe Hernández, chief innovation officer of FRV and Peter Kavanagh, CEO of Harmony Energy, called the project “an important milestone”. David Menéndez, managing director UK and BESS CoE at FRV added that the project was “one of the UK’s largest battery storage in operation per MWh”.

The project builds on the joint portfolio shared by the renewable energy development company and the renewable energy operator, which includes the 34MW/68MWh Contego BESS in West Sussex and the 7.5MW/15MWh Holes Bay.

The Hole Bay project began operation in June 2020, just as construction began on the Clan Tye site. FRV closed financing for a non-contracted revenue model for the project with NatWest in October 2021.

Earlier this year, Harmony Energy Income Trust, advised by Harmony Energy Advisors Limited, a wholly-owned subsidiary of Harmony Energy, successfully bid six BESS projects in the latest T-1 Capacity Market auction for delivery years 2024/25, which the company says will increase its revenue for this period to £3.2 million.

This article was taken from our sister site, Solar Power Portal.

3 June 2025
Stuttgart, Germany
Held alongside the Battery Show Expo Europe in Stuttgart, Energy Storage Germany spotlights Germany’s rapid ascent in the European storage sector. Once driven by residential demand, utility-scale projects are now surging, with 184 MW added across 44 projects in 2023. With nearly 16 GWh of capacity installed in the first half of 2024, Germany is set to integrate 24 GW of utility-scale energy storage by 2037, creating substantial opportunities.
11 November 2025
San Diego, USA
The 2024 Summit included innovative new features including a ‘Crash Course in Battery Asset Management’, Ask-Me-Anything formats and debate-style sessions. You can expect to meet and network with all the key industry players again in 2025 from major US asset owners, operators, RTOs and ISOs, optimizers, software and analytics providers, technical consultancies, O&M technology providers and more.
24 February 2026
InterContinental London - The O2, London, UK
This isn’t just another summit – it’s our biggest and most exhilarating Summit yet! Picture this: immersive workshop spaces where ideas come to life, dedicated industry working groups igniting innovation, live podcasts sparking lively discussions, hard-hitting keynotes that will leave you inspired, and an abundance of networking opportunities that will take your connections to new heights!

Read Next

Premium
April 16, 2025
In this blog, ESN Prmeium speaks with Dr Thomas Nann, CEO and co-founder of Allegro Energy on its microemulsion flow battery.
April 16, 2025
Quinbrook has officially confirmed the expansion of the ‘Supernode’ BESS in Queensland, Australia, via a 1,010MWh offtake agreement.
April 16, 2025
With over 9GWh of operational grid-scale BESS (battery energy storage system) capacity in the UK – and a strong pipeline – it’s worth identifying the regional hotspots and how the landscape may evolve in the future. 
April 15, 2025
IPP Enlight Renewable Energy has announced the financial close of the 128MW solar and 400MWh battery energy storage system (BESS) Quail Ranch project in New Mexico, US.
Premium
April 15, 2025
A reduction in price volatility has seen BESS revenue decrease by 40% in Australia’s NEM month-on-month in March 2025.

Most Popular

Email Newsletter