Harmony Energy founded to own and operate onshore wind assets. 15 wind sites developed across the UK within 5 years.

BESS Start

Diversified into BESS.

First BESS Approval

Holes Bay first BESS reaches shovel ready.


USS refinanced the wind portfolio.


Signed FRV deal to construct initial BESS projects (Holes Bay, Contego and Clay Tye Farm).

New Zealand

Business established in New Zealand to develop large scale solar.

Dec 2019

Sold 12 operating onshore wind sites to Blackfinch

June 2020
First Battery

Holes Bay 7.5MW / 15 MWh BESS goes live with Tesla Autobidder. (First in UK & Europe to use Megapack and Autobidder)

Oct 2020

Bloomberg reported that Harmony with Tesla was the first to go live on national grids new API.

Oct 2020
First Solar

30MW The Beeches solar farm reaches shovel ready.

July 2021
Second Battery

Contego 34MW / 68 MWh project fully commissioned using Tesla technology.

Aug 2021
Salisbury Battery site sold to SSE


Sept 2021
Work starts on Clay Tye Farm (99MW/198MWh BESS)

UK’s largest BESS by MWh.

Nov 2021
IPO - Harmony Energy Income Trust (HEIT) listed on London Stock Exchange

£186m raised to develop Harmony’s projects

Nov 2021
TagEnergy Partnership

Joint Venture agreement to build 99MW BESS with TagEnergy signed (Chapel Farm and Jamesfield Farm)

Feb 2022
Harmony Energy France launched

French business established lead by Andy Symonds and Clément Girard


HEL has a pipeline of BESS and Solar of over 2GW with over 600MW shovel ready.


Battery energy storage systems (BESS) are the key to unlocking the full potential of intermittent renewable energy; the more renewable energy that is connected, the more important the ability to manage its intermittent nature becomes. Harmony have 42MW/84MWh BESS operating in the UK, with a future 326MW/652MWh in build.

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Harmony Energy is currently developing large solar PV farms, using our project expertise to support landowners throughout the development process.

In the UK Harmony is developing 200MWs of standalone solar projects and 500MWs of solar projects co-located with its battery projects

Solar PV is a proven, cost-effective technology and many countries around the world are turning to it to help meet their energy needs.

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Harmony Energy has built and operated 15 wind power sites in the UK, so we have a wealth of project and technical expertise to share with landowners.

Our wind business was backed by one of the world’s largest infrastructure investors - Universities Superannuation Scheme (USS). The majority of the portfolio was sold to Blackfinch Investments in 2019.

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