About Sherwood Power

Our engineering heritage

Three generations
One enquiring spirit

The story behind Sherwood Power reaches back through more than 110 years of family engineering — finding value in overlooked resources and applying practical thinking to changing industrial needs.

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The story behind the story

Different industries
A familiar question

How could this resource, process or technology be put to better use?

That question connects the generations of the Hunter family: from recovering wool and washing coal, to industrial filtration, remote monitoring and renewable energy storage.

This is the family heritage behind Sherwood Power, rather than a claim that the company itself has operated for 110 years. The businesses and technologies have changed; the practical engineering outlook provides the connection.

First generation

Sherwood
Hunter

Finding value
in what was left behind

Archive portrait of Sherwood Hunter
Sherwood Hunter

From waste wool to a useful resource

Born in Aberdeen, Sherwood Hunter’s working life took him into the wool textile industry in the North West of England.

As Alex recounts the family story, Sherwood was paid to take away scraps of waste wool. He imported a German industrial washing machine, cleaned and refined the material, then sold it back to the mills.

What others needed to dispose of became a resource that could be used again.

Taking the thinking into another industry

As textile work moved overseas and demand declined, Sherwood took his knowledge of washing processes to the North East of England.

His work developed into mining engineering and coal washing, applying separation and cleaning techniques to the industrial needs of the time.

The industry was different, but the approach was recognisable: understand the material, improve the process and find a practical use for the result.

Archive photograph of industrial buildings and equipment Archive photograph of an industrial processing plant Archive photograph of colliery structures and equipment
Industrial archive photographs from the family’s heritage presentation.

Second generation

George and
Sue Hunter

Filtration expertise
International applications

Archive portrait of George Sherwood Hunter
George Sherwood Hunter

Building a business around better processes

George Sherwood Hunter, born in Newcastle, and Sue Hunter helped carry the family’s engineering story into industrial filtration and separation.

In 1963, George and Sue founded domnick hunter with Keith Domnick in Birtley. The business went on to become part of Parker Hannifin.

Their work connected technical development with the practical needs of industrial customers — an approach that would continue into their next business.

1963

domnick hunter

George and Sue Hunter were among the founders of the filtration business.

1976

PSI Global

Process Scientific Innovations was established, continuing their work in filtration and separation.

Taking specialist engineering to wider markets

Established in 1976, the business now known as PSI Global developed specialist filtration and separation technology for international markets.

Its applications extended across industries including food and beverage, rail, semiconductors, industrial automation and automotive manufacturing.

The family story had moved from recovering materials to helping industrial processes work more effectively.

Parker and domnick hunter logos
domnick hunter later became part of Parker Hannifin.
PSI Global logo
Specialist filtration and separation.

Third generation

Alex
Hunter

Connecting engineering
with new opportunities

Portrait of Alex Hunter
Alex Hunter

From product thinking to remote monitoring

Born in Chester-le-Street, Alex studied at Central Saint Martins in London and worked at PSI Global before developing businesses of his own.

In 2002, he established a remote telematics business, with Aggreko among its key clients. That work brought together equipment, operating information and the ability to understand what was happening at a distance.

Making better use of energy

Alex later acquired a heating business in the North East, integrating solar electricity, solar thermal technology and heat pumps to help customers reduce their use of kerosene.

Today, as founder and CEO of Sherwood Power, his focus is the opportunity energy storage creates: helping renewable electricity serve business needs beyond the moment it is generated.

IPO2 logo
Remote telematics
Heatsource logo
Heating and renewable technology
Sherwood Power — Balancing Energy
Energy storage
Meet Alex

What connects the generations

An inherited outlook
A new set of challenges

Heritage shapes the questions we ask. Today’s engineering must answer them.

Swipe to explore

01

Look for overlooked value

Start with what is available. Ask whether a material, a process or surplus energy could be put to better use.

02

Understand the real need

Connect engineering with the conditions on site, the way a business operates and the problem it needs to solve.

03

Keep the thinking moving

Carry useful knowledge into new applications. Adapt the approach as industries, technologies and customer needs change.

Sherwood Power today

Bank the surplus
Unlock the value

The Sherwood FAB — Free Air Bank — uses air and water to store energy. It banks renewable energy on site for later use, helping businesses make more of their energy supply and manage changing demand.

Renewable electricity can come from on-site generation, the grid or both. The system is configured around the site, its energy needs and its available connection.

The family heritage provides context for that approach. The case for each system rests on its engineering, its proposed application and the value it can offer the customer.

Explore the Free Air Bank

The next chapter

Your challenge
Our shared thinking

Have a site, a project or an idea to explore? Start a conversation with the team.