Home » SolShare 2 launches to help flats meet new solar PV and battery requirements
Allume Energy has launched SolShare 2, a solar technology which enables UK flats to benefit from integrated shared solar and battery systems.
The original system, launched in the UK in 2021, allows a single rooftop array to connect directly to multiple tenant meters.
Meeting the Future Homes Standard (FHS) and EPC requirements, the SolShare system helps developers and social housing providers to boost SAP scores and tackle fuel poverty for residents by reducing bills by up to 40%.
The FHS, which comes into force next year, will require solar PV on the vast majority of new-build homes in England and will see the methodology behind energy ratings change from SAP to the new Home Energy Model (HEM).
That means landlord-owned communal systems will no longer be applicable, and flats can only earn an EPC uplift if PVs are connected directly to their own meter.
Just 3% of UK flats have solar panels, against 7% of houses and bungalows, and above six units, fitting an individual system to each home becomes complex, space-hungry and expensive, with multiple inverters, isolation points and monitoring systems.
Allume’s SolShare 2, the latest generation of the world’s only multi-dwelling solar-sharing technology, resolves it by connecting one rooftop array directly to each flat’s meter, delivering on EPC uplift demands.
Alongside the device’s increased capacity, flats can also benefit from integrated solar and battery systems. Battery fire-safety rules for homes (PAS 63100) don’t permit the kind of shared, landlord-side battery a block would normally need, so until now flats have been effectively locked out. SolShare 2 gets around this blocker via a connection on each flat’s own side of the meter, allowing every home to share in a battery while keeping each installation compliant.
The government’s £15 billion Warm Homes Plan, the largest home-upgrade programme in British history, includes a £5 billion fund aimed at low-income and social housing, with solar and batteries among the measures and a 2030 EPC C deadline driving urgency. That government funding can, in some cases, cover the full amount of an install.
SolShare 2 allows providers to retrofit solar at scale across multi-home blocks from a central plant room, with no equipment, hardware or access required for inside individual flats. It is also agnostic to both solar panels and energy providers, so tenants do not need to switch suppliers.
Allume says 10,000 flats are already benefitting from its SolShare devices globally, installs which have cut residents’ bills by up to 40% and delivered 5-20 SAP credits per flat. The company works with hundreds of social housing providers across the UK, including Peabody and local authorities such as Lewisham and Camden Boroughs.
Allume estimates that with improved battery integration, SolShare 2 could offset up to 80% of an apartment’s grid energy use.
Cameron Knox, CEO and Co-Founder of Allume Energy, said:
“The records the UK has set this year show solar’s potential, but they will 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.
“We want to address that imbalance, making sure those on the lowest incomes see the benefit of the renewable transition, whilst shoring up the UK’s energy security. SolShare 2 closes the gap, and now, coupled with battery integration, lets those living in flats share in the benefits of clean energy.”
​​Allume’s Head of Commercial & Policy Engagement, Ramin Hakimov, added:
“We work hand-in-hand with social housing providers, private developers and M&E contractors to deliver real impact for residents across both retrofit and new-build projects. A prime example is our project at Odet Court with Wales & West Housing, where SolShare connected 24 flats to a single system, boosting the building’s SAP score by 15 points and saving residents up to £690 a year on their bills.
“With the FHS coming into force, bringing existing and new stock into compliance can feel daunting. But with ambitious government targets and funding behind green energy, the pieces are falling into place. SolShare 2, coupled with battery integration, is designed to make scaling these large projects and sharing the benefits of clean energy as straightforward as possible.”
Chris Norbury, CEO of E.ON UK, said:
“Making new energy work for everyone means building the system around people and communities. That has to include people living in flats, who have largely been unable to access clean, affordable energy until now.
“Thanks to Allume’s SolShare 2 technology, millions more people across the UK will now be able to benefit from shared solar power and battery storage. That means better homes for the way we live today, giving people more control over how they use energy and putting money back into their pockets.”
For developers, Allume’s device offers a route to FHS compliance without significant capital expenditure. Under the standard, which comes in next year, solar must be designed into new-build flats from the outset. The solution also simplifies the M&E challenge with minimal roof and plant space, with one system for up to 15 flats, simplified DC cabling and a single isolation point.
It lets designers tailor kWp allocation per flat to hit specific EPC targets, regardless of orientation, with a typical two-bed top-floor flat gaining around nine SAP points, enough to lift it from EPC C to B. The higher capacity of the second-generation device, up by a half, supports larger arrays and more generous per-flat SAP credits.
SolShare 2 will be available in the UK from August 2026. For more information on Allume and SolShare, visit www.allumeenergy.com/en-gb/
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