The Yorkshire-founded company, one of Europe’s most active developers, owners and operators of grid-scale battery energy storage systems (BESS), was recognised for its measurable contribution to the UK’s clean energy transition.
The essential link in a homegrown energy system
This award is not just a reflection of the incredible effort of the Harmony Energy team. It’s recognition that battery storage is the essential link in a homegrown energy system that this country needs, and that the case for it has never been stronger.
The company’s UK operational portfolio can power over 1.2 million homes for two hours. Across 17 sites, Harmony has delivered the three largest BESS projects in Europe by MWh at their time of launch, including Pillswood in Yorkshire, Clay Tye in Essex, and Bumpers in Buckinghamshire. Working with Tesla, Harmony was also the first organisation in Europe to deploy 2-hour Megapack systems, doubling the typical storage duration available in the UK market at the time.
Not just a climate story
The case for battery storage extends well beyond decarbonisation. Independent energy analyst Modo Energy published research in May 2026 finding that batteries in Great Britain have saved consumers £188 million since December 2024, with every single month in that period net positive for consumers. Savings have been delivered through both the Balancing Mechanism and suppression of wholesale energy prices.
Battery storage also reduces the need for National Grid to curtail surplus wind generation, an expensive and wasteful outcome that has cost the system around £1.4 billion in a single reporting year. By storing that surplus and releasing it when demand requires, BESS assets improve the efficiency of the whole energy system.
Private investment, public benefit
Harmony’s portfolio has been built on private capital. That investment sits within a rapidly growing sector. Research from CBI Economics, reported by the Guardian, commissioned by the Energy and Climate Intelligence Unit, found that the UK’s net zero economy contributes £105 billion in gross value added and supports 1.1 million jobs, with £455 billion of energy and infrastructure investment in the pipeline. Workers in the sector earn around 11% above the national average.
To find out more about Harmony Energy’s battery storage projects, visit www.harmonyenergy.co.uk/bess
