Allume Energy Secures £4 Million from E.ON UK to Power Apartments with Shared Solar Systems

A new investment in solar tech could soon change the energy game for apartment dwellers. Thanks to Allume Energy’s innovative SolShare system, residents in flats—long excluded from the benefits of rooftop solar—may finally see greener energy and lower bills delivered straight to their homes.

Allume, a cleantech company founded in Melbourne in 2015, has developed SolShare. This world-first technology allows a single rooftop solar system to serve multiple units in the same building directly. In simple terms, it shares solar energy fairly among households, delivering each home its portion when it needs it most.

Now, E.ON UK is backing that technology with a strategic £4 million investment. The deal marks a significant vote of confidence in Allume’s mission and supports its growth across the UK market. It also aligns with E.ON’s broader vision to drive the shift toward cleaner, more sustainable energy solutions.

Historically, apartment residents have been excluded from the solar revolution. Even when panels were installed on a building, the energy they generated often powered only communal areas of the building. Individual households were still paying full price for electricity drawn from the grid.

SolShare flips that model. It takes electricity from one rooftop solar system. It distributes it among individual flats in real-time, based on actual usage. No changes are needed from energy suppliers or network providers. Residents receive their solar share automatically while still having the option to choose their electricity provider.

The key is that this happens behind the meter, meaning the energy is both generated and used within the same building. This not only lowers bills but also eliminates the typical red tape that comes with shared infrastructure.

Chris Norbury, CEO of E.ON UK, said: “Our investment in Allume is another important step towards making the transition to clean energy more inclusive. More than a fifth of British homes – five million – are low and medium-rise apartment buildings with rooftop space for solar panels, but no way of directly benefiting until now. And with about one in six people currently living in social housing, we see an enormous opportunity to help people to lower their energy bills and reduce their carbon emissions, making solar more useful and affordable for the many, not the few.”

Cameron Knox, CEO of Allume, added: “People living in flats experience the highest fuel poverty rates in the UK, yet have historically been locked out of rooftop solar due to technical and ownership considerations. SolShare enables them to access free, clean energy from the sun. Working with E.ON UK offers a transformational opportunity for Allume to scale our existing offerings and create new models across Europe, where 300 million people live in low and medium-rise apartment buildings.”

According to Allume, SolShare systems can cut household energy costs by 30 to 60 per cent. In addition to shrinking carbon footprints, the technology gives people more control over when and how they consume energy. It’s already been deployed in more than 6,000 homes around the world and has delivered over 14 gigawatt-hours of clean electricity.

More than half of Allume’s UK installations are in partnership with social housing providers. For older buildings, in particular, SolShare offers a low-cost, high-impact way to retrofit sustainable energy systems and meet modern energy efficiency targets.

Currently operating in Australia, the UK and the United States, Allume plans to expand its reach across Europe next. With E.ON’s backing, the path toward that growth just got a whole lot clearer.