SolShare 2 battery helps flats get solar energy

• Allume Energy’s new battery makes it easier for people in flats to cut bills
• Lower-income household should particularly benefit
• Tech is in response to upcoming Warm Homes Plan

It might soon be a lot easier for people who live in flats to get solar energy thanks to the launch of SolShare 2, a new battery storage technology that can cut energy bills and help low-income families escape fuel poverty. 

Designed by Allume Energy, with a £4mn investment from E.ON UK, SolShare2 builds on SolShare, which has helped cut energy bills by as much as 40% across 10,000 homes. 

SolShare lets several flats share the energy created by one rooftop solar system. It’s a smart device that sits between the roof panels and flats’ meters to split the energy across all the participants. 

In one case in Cardiff, 24 flats were connected to a single rooftop system and the tenants were able to save £690 each a year. This is because the energy they drew from the grid dropped by 70%. 

Cameron Knox, CEO and co-founder of Allume Energy, said the great steps the UK has made in renewable energy would “ring hollow” if the “poorest in society see little of the benefit”.

“Right now, a family in a social housing flat watches the same sun fall on their neighbour’s house, yet only one of them sees a reduction in bills,” Knox said. 

“SolShare 2 closes that gap, and now, coupled with battery integration, lets those living in flats share in the benefits of cleaner, cheaper energy.”

Joanna Davoile, Executive Director (Assets), Wales & West Housing, home of the 24 flats, said: “The SolShare system seems to be a much fairer solution, as the energy generated by the building can be shared equally to help our residents keep their electricity costs down rather than going back to the grid.” 

Allume Energy said the launch of SolShare 2 is in response to upcoming changes in the law and regulations around solar. The Future Homes Standard means almost all newbuild homes will need solar PV and the soon-to-be-announced Warm Homes Plan will put solar PV and batteries at the centre of home energy.

Written By

Maximilian Schwerdtfeger Deputy editor

Max joined The Eco Experts as content manager in February 2024 and became deputy editor in 2025. He has written about sustainability issues across numerous industries, including maritime, supply chain, finance, mining, and retail. He has also written extensively for consumer titles like City AM, The Morning Star, and The Daily Express.

He has represented The Eco Experts on national television several times, including the BBC’s Sunday Morning Live and ITV Tonight .

In 2020, he covered in detail the International Maritime Organisation’s (IMO) legislation on sulphur emissions and its effects on the global container shipping market as online editor of Port Technology International.

He also explored the initiatives major container ports and terminals have launched in order to ship vital goods across the world without polluting the environment.

Since then, he has reported heavily on the impact made by environmental, social, and governance (ESG) practices on the supply chain of minerals, with a particular focus on rare earth mining in Africa.

As part of this, in 2022 Max visited mines and ports in Angola to hone in on the challenges being faced by one of the world’s biggest producers of rare earth minerals.

His most recent sustainability-related work came much closer to home, as he investigated the eco-challenges faced by independent retailers in the UK, specifically looking at how they can cut emissions and continue to thrive.

Max lives in South London and is an avid reader of books on modern history. He has also recently learned to play the game Mahjong and takes every opportunity to do so. He is also yet to find a sport he doesn’t enjoy watching.

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