SolShare 2, due to be available in the UK from August, can support up to 30kW capacity, an increase from the flagship 20kW product.
June 16, 2026
Allume Energy has redesigned its shared solar PV technology that enables a single rooftop installation to connect to multiple properties.
The Melbourne, Australia-headquartered company aims to tackle ownership and technical barriers to solar adoption for shared dwellings like apartments and social housing.  
SolShare 2, due to be available in the UK from August, can support up to 30kW capacity, an increase from the flagship 20kW product. It can support up to 15 connections. The rooftop solar array is intended for installation on flat blocks, enabling residents from multiple flats to access the solar generation.
SolShare 1 has been available in the UK since 2021, and in June last year Allume received a £4 million strategic investment from E.ON UK. 
Alongside the increased capacity of SolShare 2, Allume has made battery energy storage system (BESS) integration with the system more straightforward. A communal BESS stored in or near flats with the rooftop array pairs with the SolShare 2 system via an Ethernet connection. 
Related:Carlyle-backed Revera takes FID on 800MWh BESS: ‘a vote of confidence in Scotland’
The system, which is PV and supplier-agnostic, also allows residents to discharge to the grid, with grid-charging to follow.
According to Cameron Knox, CEO and co-founder of Allume Energy, compliance and regulations in the UK had made it “all but impossible” to install integrated solar and BESS at flats, “but SolShare 2 changes that.”
This comes as the UK government is gathering evidence on how to enable shared battery storage to be rolled out across the UK. A federal government subsidy scheme in Australia demonstrates how the UK government might hope to intervene to establish a network of community batteries in the UK. 
The call for evidence will gather views on how to scale up deployment, remove regulatory and commercial barriers, ensure safety, and make sure the benefits reach those unable to install private domestic energy storage, like renters and people living in flats. 
It cites Allume’s 2023 BESS installation at its SolShare 1 array on a Cardiff flat block, which the company says has seen grid energy demand drop 60-70%.
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Molly Green
Section Editor, Informa
Molly joined the team in 2024 and has led coverage on the UK sites. Now shifting to a more global view, Molly is interested in how legislation shapes market dynamics, covering the intersection of policy design, investment patterns, and energy transition pathways. 
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