What if the biggest gap in the clean energy transition isn't technology or politics, but simply who the products were designed for? In this episode of Why Design, Rob Hallifax shares the belief that sits at the heart of his work: that half the country has been left behind by clean energy, and that the right physical product can change that. Rob is co-founder of Windfall Energy, a company building a compact home battery specifically for renters and flat-dwellers, the people for whom solar panels, heat pumps and big home batteries have never been a realistic option. Rather than building another clean tech product for homeowners with garages and south-facing roofs, Rob and his co-founder designed something different: a 2.5 kWh battery that orders online, arrives by courier, and automatically charges on cheap overnight electricity to power your home during expensive peak hours. That decision, to start with who was excluded rather than who already had options, led to Bethnal Green Ventures backing the company, conversations with major UK energy providers, and a pre-order campaign launching in early 2025. This conversation isn't about home energy storage. It's about who clean technology is designed for, and who it quietly ignores. This conversation isn't about Kickstarter tactics. It's about what a decade of crowdfunding campaigns teaches you about making products people actually want. Join the Why Design community -> teamkodu.com/whydesign 6c. What You'll Learn Why roughly half of UK homes are structurally excluded from every clean energy product on the market, and what it takes to build for that gap.How the economics of battery cells and electricity pricing have only recently made a product like Windfall viable, and why timing matters as much as the idea itself.Why Rob treats the industrial design of a home battery as a commercial priority, not an afterthought, and how that shapes every decision from designer brief to product form.Why Windfall leads on saving money rather than saving the planet, and what it means that cheap and green electricity are effectively the same thing on the UK grid.How a B2B2C strategy through energy companies solves distribution, tariff integration and end-user complexity in one move.What a decade of Kickstarter campaigns actually teaches you about validating physical products, building audiences before launch, and knowing when to walk away from something that is not working. Memorable Quotes "We thought, what can we make for the people who've been left behind? Effectively half the country." "The making of the thing is kind of the easy bit. The hard bit is always finding customers, making a product that people actually want." "If you're not embarrassed by your first product launch, you've waited too long." "In terms of marketing stuff, we lead on saving money and the green thing is more than just a happy bonus. They are definitely tightly integrated." "You need to know when something's not going to work and be prepared to kill it. That can be hard, especially when it's your own." Resources and Links 🎧 Listen on Spotify, Apple Podcasts, YouTube & Amazon -> whydesign.club 👥 Join the Why Design community -> teamkodu.com/whydesign 📸 Follow @whydesignxkodu on Instagram 🎥 Watch full episodes -> YouTube.com/@whydesignpod 🔗 Follow Chris Whyte -> linkedin.com/in/mrchriswhyte 🔗 Explore Windfall Energy -> windfallenergy.com 🔗 Connect with Rob Hallifax -> robhallifax.com , LinkedIn About the Episode Why Design is powered by Kodu, a specialist recruitment partner for the hardware and physical product development industry. Through honest conversations with designers, engineers, and creative leaders, we explore not just what they build but why they build it; the beliefs, decisions and responsibility behind meaningful work. About Kodu Why Design is produced by Kodu, a recruitment partner for ambitious hardware brands, design consultancies and product-led start-ups. We help founders and leadership teams hire exceptional talent across industrial design, mechanical engineering and product leadership, bringing structure and clarity to one of the hardest parts of scaling. 🔗 Learn more -> teamkodu.com