Windfall
Energy
Windfall Energy are the creators of the Windfall Battery: a plug-in battery that lowers bills for renters and people in flats.
The company was founded in 2025 with the aim of bringing cheaper, cleaner energy to everyone - not just people living in big houses who could afford it.
Since then, we’ve been speaking to people around the UK about their energy usage. Particularly people who rent or live in flats who feel powerless to do anything about their increasing bills.
Our technology is based on the premise that there’s plenty of cheap green energy on the grid these days, but not necessarily at the times you need it. So if you can decouple when energy is purchased from when it is used, you can save money.
We first tested some of our theories by developing a smart plug that we got into the hands of 100 users. Building on that, we then tested a beta battery product which we installed in home in and around London.
We recently sold out of the first pre-orders of the Windfall Battery.
Team
Ashley and Rob met at a Green IoT Meetup, and were both looking for ways to use their skills and experience to have a positive impact on the climate crisis. They shared a frustration that it’s difficult to make a difference to your energy consumption when you live in a flat.
After spending time researching solutions, and visiting Germany to understand the emerging Balkonkraftwerk movement, it became clear that there was a wide gap in the market for products designed specifically with this audience in mind.
Ashley Grealish
Start-up engineering leader, with experience creating innovative solar battery systems which brought clean energy to 500,000+ homes in rural East Africa. Ashley previously created the largest platform for managing Utility EV Smart Charging programs as VP of Engineering and CTO at ev.energy.
Co-founder & CEO
Rob Hallifax
Builder of both digital and physical products. Previous work has involved Internet of Things systems, scientific instrumentation, and design platforms. Rob has founded two companies to commercialise consumer products after multiple crowdfunding campaigns and ten thousand happy Kickstarter backers. He’s also a double world record holder.
Co-founder & CPOWe’re supported by a small team working on engineering, operations and design.
Mechanical Engineer interested in the intersection of sustainability, policy, and product development.
Bianca is a recent graduate of Harvard University with an MSc in Cleantech Innovation from Imperial.
Bianca Byfield
Operations specialist and community builder with experience across a Big Four consultancy, SMEs and tech-for-good start-ups.
Isabel supports the founders across operations, B Corp certification, stakeholder engagement, commercial storytelling and helping shape ideas.
Isabel Spigarolo
Ben King and Victor Gil combine homeware fluency with serious technical delivery, helping turn the Windfall battery into a product that feels right at home and works brilliantly.
Their experience spans IKEA, Lakeland, Joseph Joseph, Kingfisher, JCB and Kohler Mira, plus 175 plus launches, 11 patents and more than 25 awards.
Ben King & Victor Gil
Advisors
And a board of advisors adding depth in product, marketing, manufacturing, energy industry, and finance.
Digital media designer, marketer, revolutionary product designer and entrepreneur. Co-founder of Plumen, digital agency Poke, and the Lovie awards.
Nicolas Roope
Engineer, entrepreneur and technology visionary. Co-founder of Bboxx - providing a distributed network of a million batteries across East Africa. Advisor to Ionetic.
Chris Baker-Brian
Energy industry expert, leading reform and delivery to accelerate the energy transition. Currently Chief Executive Officer of Community Energy England, and formerly director at National Energy System Operator, and Chief Energy Ombudsman.
Dr Matthew Vickers
Investors
We’re proud to be backed by Bethnal Green Ventures, Europe’s leading early stage tech-for-good VC, and some angel investors.
If you’re interested in investment opportunities with Windfall Energy, we’d love to hear from you.
