Delivering Britain’s energy storage needs

We independently develop, own and operate Battery Energy Storage Systems (BESS) that serve a greener, resilient, and more flexible grid

With 25 years’ experience delivering large-scale electrical infrastructure across the country, we are today a market leader in the construction and operation of grid-scale battery storage sites.

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Best-in-class battery energy storage

Our specialist team design, supply, install, operate, maintain, and optimise our BESS projects working alongside a wide range of industry partners and other stakeholders, including landowners and local community members.


Expertise in site identification through in-house specialists and external exclusive partners

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Development and design of projects, including planning, connections and land lease to generate ‘shovel-ready’ sites

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Supply & Install

Source, supply and build: from connection to asset commissioning upon energisation

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Operate & Maintain

A nationwide engineering operation, with dedicated monitoring for remote management

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Multi-faceted strategies to maximise revenues accessing all available markets and services

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Recycle & Repower

Plan and perform repowering during the site life, maximising value by upgrading cell every c.10yrs.


Of BESS projects to be delivered by 2026


BESS market share (UK), based on our current pipeline


years’ experience delivering large-scale electrical infrastructure across the country

Our BESS projects

Our inaugural 50MW BESS site in Burwell, Cambridgeshire, was successfully energised in January 2022. Find out more about the project.

  • 50MW (Burwell, Cambridgeshire – Fully operational
  • 40MW (Barnsley, Yorkshire) – Fully operational
  • 50MW (Brook Farm, Suffolk) – Fully operational
  • 50MW (Brentwood, Essex) – Under construction
  • 50MW (Newtonwood, Derbyshire) – Under construction
  • 50MW (Berkeley, Gloucestershire) – Under construction
  • 570MW (across UK) – In pre-construction stage or under exclusivity
bess projects
Battery Storage

What is battery energy storage?

Battery energy storage is an essential technology for overcoming the energy system’s biggest modern challenge: the transition to green energy. As renewables are intermittent, batteries connected to the National Grid are needed to store clean electricity whenever it is generated. In this way, green power can be supplied and consumed on demand by the UK population no matter what time of day it is, or what the weather is like.

In addition to helping phase out fossil fuels and reduce carbon emissions, batteries also play an increasingly vital role in stabilising, balancing, and protecting the grid, adding a much much-needed layer of flexibility as the UK moves to electrified transport and heating systems in coming years.

Our commitment to sustainability

At all of our BESS sites and across our entire business, SMS is committed to leaving a positive environmental and social impact. This includes:

  • Implementing a range of on-site biodiversity improvements
  • Protecting habitats around the perimeter of the site with fencing
  • Working closely and engaging regularly with the local community
  • Installing a low-carbon technology critical for carbon reduction

To find out more about our Environmental, Social, and Governance (ESG) commitments, including our organisational Net-Zero 2030 target, visit our Sustainability section.

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Landowner guide

Download our Landowner Guide

Play your part in Britain’s clean energy revolution! Leasing your land for an energy storage development can make a significant contribution to the country’s carbon reduction efforts, help combat climate change, and generate long-term annual income for your estate.

View Landowner guide

Low risk, sustainable revenue opportunities

With the renewable energy revolution rapidly gathering pace, the growing requirement for grid-scale battery storage to support this transition offers increasingly valuable market opportunities. Investing in, or leasing land to, a battery storage system presents a huge opportunity for green energy developers, investors, and landowners to accelerate risk-free, sustainable revenues that support Britain’s zero carbon ambition.

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25+ years of expertise in delivering large electrical infrastructure projects

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Track record securing planning, grid connection, and subsequent site builds

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Full turnkey solution: design, supply, install, operate, maintain, and optimise

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Sustainably-focussed, financially strong partner listed on the FTSE AIM 50

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A socially and environmentally responsible business which invests in and supports the local communities where we operate

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Make an enquiry

Interested in our battery storage solutions? Get in touch with our expert teams today.

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Discover more

Power Plant Press release

SMS energises 50MW battery energy storage site in Cambridgeshire

Our 50 megawatt (MW) system is one of the largest battery sites to be energised and connected to National Grid’s transmission network so far.

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SMS enters grid scale batter storage Insights

Why SMS has entered the grid-scale battery storage market

Efforts to deliver a modernised, cleaner, and smarter energy system for Britain are nothing new for SMS. Our entry in the battery storage market is built on decades of expertise already dedicated to developing Britain’s low-carbon energy infrastructure.

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Residential housing estate with soloar panels Insights

How to create low-carbon social housing that can tackle our hidden fuel poverty problem?

By partnering with social housing landlords to deliver a fully-financed and intelligently operated solar PV and battery storage solution, Solopower aims to support decarbonisation efforts in a way that makes clean energy accessible and affordable for tenants.

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