Anglian Water is trialling state-of-the-art technology to store energy at its Cambridge Water Recycling Centre.

The energy storage systems use ‘second-life’ batteries from electric vehicles to collect and store energy. The stored electricity is then used to power the site at times when demand is highest, taking pressure off the electricity grid as well as saving money.

Much of the site’s power needs are already met using renewable energy - giant Combined Heat and Power (CHP) engines which run on gases produced by the sewage treatment process provide huge efficiency savings in both cost and carbon footprint.

Anglian Water use recycled electric car batteries to power their water treatment work in Cambridge.

The batteries themselves are British designed and developed. The E-STOR technology uses second life Renault electric vehicle batteries to provide a smarter, affordable and more flexible approach to grid load management. Sophisticated operating software allows users to maximise efficiencies and savings by storing excess energy for when it is needed most such as times of peak demand or when energy tariffs are high.

Matt Pluke, Anglian Water’s Energy Manager, sees the trial as a significant step in the company’s drive to become even more efficient – and carbon neutral.

Matt Pluke said:

“Energy, in the form of grid electricity, is an important part of Anglian Water’s cost and carbon footprint. And it’s not just about how much energy we use, but also about when we use it. By using the batteries in this way we put less strain on the National Grid at peak times, and also save money by avoiding high energy tariffs.

“This kind of technology is a great example of how we can reuse items as part of a wider circular economy. Reducing the amount of grid energy we use by maximising our use of renewables as well as embracing new technologies is good for the business and great for the environment too.

Last year across the company, some 98 million kWhs were produced from CHP “poo-power” alone, with a further 15 million kWhs produced from wind and solar power. By 2020 the company plans to invest millions on producing even more renewable energy.

Matt Pluke continued:

“This is the start of an exciting journey for battery storage in Anglian Water. This trial will provide the detailed data we need to prepare for a wider roll out across the region. We want to make the most of storing energy generated from our renewable sources, like the solar panels we are installing across our region. Integrating batteries into these projects could make them bigger, it would ensure more of the renewable power is used on site and would also give additional security of supply.”

Jason Cox from Connected Energy Limited who has developed the E-STOR energy storage technology, added:

“The energy landscape in the UK has shifted. The debate isn’t just about how much energy we use, it’s also about when we use it. Anglian Water and Connected Energy have worked together on this energy storage trial to help maximise the potential of renewable energy projects and offer grid services support for the future.”