E.ON Next announced on 23 December 2025 that it has partnered with Allume, an Australian cleantech company, to bring shared rooftop solar to blocks of flats across the UK1. The partnership will use Allume's SolShare technology, which E.ON Next describes as a smart, behind the meter hardware and software solution that lets multiple flats in one building share solar PV energy from a single rooftop system1.
Under the arrangement, panels on the roof generate electricity and the SolShare device automatically allocates that energy in real time to each flat, based on residents' energy use at any given moment1. E.ON Next says this ensures as much solar energy as possible is used within the building rather than being sent back to the grid1. The company states that traditional solar panels usually connect to just one meter, meaning only one home in a block can benefit, and that SolShare skips the need for dozens of individual setups and cuts through much of the legal red tape that usually makes solar for flats difficult1.
"It turns one large, cost effective solar installation into a shared resource."
E.ON Next says the partnership is focused on two areas: social housing and new build housing1. It states that flats with an EPC rating of D and below can often be upgraded to EPC B at no cost to social housing providers, through funding schemes it says are unlocked by SolShare1. For new builds, it says building solar sharing into the design from day one can bring solar energy into new blocks of flats1. The announcement cites Energy Saving Trust figures from 2022 showing that large urban areas including Poplar, Limehouse, Bethnal Green and Stepney in London have as few as 20 solar panel installations per 10,000 people, among the lowest numbers in the UK1.
Why it matters for households
For flats, the practical barrier to solar has been metering rather than roof space: one roof, many electricity meters, and a single connection point. Shared solar behind the meter changes who can draw on a building's generation, and how that generation is divided between residents. E.ON Next says allocation is based on each flat's energy use in the moment, which means the share a household receives varies with its own consumption rather than being fixed in advance1. The company has not reported how costs, savings or service charges would be divided between residents, or how a shared supply would interact with an individual flat's own supplier arrangement. For households in social housing, the EPC claim is notable: E.ON Next says flats rated D and below can often reach EPC B at no cost to providers, which bears on warmth and running costs rather than on generation alone1. For anyone in a block considering solar PV, the announcement sets out a route to rooftop generation without a private roof, but the terms for individual residents have not been reported.
What happens next
No dates, rollout schedule, pilot locations or number of properties covered have been reported1. E.ON Next says only that the partnership will allow it to grow Allume's offering to reach social housing providers and new build housing developers1.