What is Mixergy?
Founded in 2014 by Peter Armstrong and Ren Kang following their doctoral research at Oxford University, Mixergy has evolved from an academic concept into a robust enterprise-level player. The company specializes in smart hot water tanks that utilize IoT connectivity to optimize energy consumption, effectively reducing the carbon footprint of residential heating. With a team of 17 professionals and a strategic partnership with British Gas, Mixergy is positioned at the intersection of clean technology and smart home infrastructure. The firm addresses the critical need for energy efficiency, providing a scalable solution that transforms conventional water heating into a data-driven, value-added service for modern households.
How much funding has Mixergy raised?
Mixergy has raised a total of $28.7M across 3 funding rounds:
Other Financing Round
$2.1M
Other Financing Round
$11.3M
Other Financing Round
$15.3M
Other Financing Round (2019): $2.1M with participation from Williams Advanced Engineering and Foresight Group
Other Financing Round (2023): $11.3M led by Nesta and EDP Ventures
Other Financing Round (2025): $15.3M supported by Barclays
Key Investors in Mixergy
Barclays
Barclays PLC is a British multinational universal bank providing a wide range of financial services, with a strong focus on digital innovation and sustainable finance.
Nesta
Nesta is a research and innovation foundation dedicated to developing, testing, and scaling solutions to major social and economic challenges, including environmental sustainability.
EDP Ventures
EDP Ventures is the corporate venture arm of EDP group, focusing on disruptive technologies in the energy sector such as smart grids, energy efficiency, and renewable power.
What's next for Mixergy?
With this major enterprise-level funding, Mixergy is poised to accelerate its market penetration and scale its manufacturing capabilities. The strategic backing from institutional investors and energy-focused venture arms provides the necessary runway to expand its footprint within the UK and potentially international markets. Future growth will likely center on enhancing its predictive analytics capabilities and deepening its integration with smart grid ecosystems. As the global transition toward sustainable energy intensifies, Mixergy's ability to provide demand-side response services through its connected tank technology will be a key differentiator in the competitive landscape of residential energy management.
See full Mixergy company page
