E.ON Partners with Superdielectrics to Unlock Breakthrough in Affordable Home Battery Tech

Image Credit: Superdielectrics

In a move that could redefine the future of home energy storage, power giant E.ON has entered into a strategic partnership with Cambridge-based startup Superdielectrics — a rising player in the energy tech space with a bold mission: to challenge the lithium-ion status quo.

Superdielectrics’ flagship innovation — the Faraday 1- is at the heart of the collaboration. Launched in 2024, this hybrid energy storage system isn’t your typical battery. Built on a water-based polymer technology, it uniquely fuses supercapacitors' fast-charging capabilities with traditional electrochemical batteries' long-term storage potential. What’s more intriguing? The core material draws inspiration from contact lens technology — making it greener, safer and significantly cheaper than lithium-ion alternatives.

“We are delighted to sign this ground-breaking collaboration agreement with such a globally respected energy group as E.ON,” said Heathcote.

“Their support and insight will enable us to accelerate the development of our technology and bring it into production far sooner. We believe that our technology has the potential to revolutionise power generation and consumption and deliver enormous environmental and cost benefits to millions of people.”

The tech itself stems from a research collaboration with Bristol University. Superdielectrics has wasted no time securing a robust IP portfolio with patent protections across multiple regions.

While it doesn't yet match lithium-ion in energy density, Faraday 1 charges faster, lasts longer and carries fewer safety risks. According to CEO Jim Heathcote, the goal is to lease these units to households across the UK — a bold, market-facing step that the E.ON partnership directly supports.

The alliance with E.ON is more than just a funding handshake; it’s a hands-on collaboration to refine the technology's performance in real-world domestic environments. Through the partnership, Superdielectrics expects to gain critical insights, fine-tune performance, and ramp up the pace of development toward a mass-market, affordable energy storage system.

Looking ahead, the company teased a major update slated for later in 2025 that could bring it closer to closing the energy density gap with lithium-ion.

“The energy transition is about making energy more affordable and more sustainable and to do that, we’re always looking for and encouraging new technologies to make energy better for customers,” said Julian Lennertz, chief commercial officer at E.ON Next.

“Whether our approach is in-house or through partnerships, we’re always looking to come up with new ways to benefit our customers and to make new energy work for everyone. Superdielectrics’ technology could be a vital part of creating a cleaner, lower-cost energy future for everyone.”