Mixergy develops grid-connected smart hot water tanks that act as distributed energy storage, optimizing energy use and enabling better integration of renewable power. Its technology is said to cut hot water bills substantially (the article cites reductions up to 60% in one place and up to 40% for its top-down heating approach). The company offers hardware, software and a Mixergy App that uses machine learning to optimise consumption, and has an integrated hot-water heat pump with regulatory approval. Mixergy plans to pivot toward a technology-licensing and strategic-partnership model focused on new builds, social housing retrofits and commercial properties, and to expand R&D capabilities. It has partnerships with energy companies including British Gas and targets social housing providers, property developers, energy utilities and HVAC OEMs. The company positions its tanks to store cheap or excess renewable energy and ease grid pressure during peak demand, supporting UK net-zero goals. Mixergy was founded at Oxford University and emphasizes reducing carbon emissions while cutting household costs. Mixergy is a Cassington, UK-based developer of smart and connected hot water tanks and home energy management technologies. The company holds a suite of IP around hot water heating, heat pump and home energy management, including a patented approach that exploits thermal stratification to heat only what users need. Its smart tanks enable households to save money and reduce their environmental impact. Mixergy also connects a decentralized digital network of tanks that can provide flexibility to the grid and support the clean energy transition. Led by CEO Peter Armstrong, the company plans to use new funds to open an R&D centre at its Oxfordshire headquarters, further develop its technology, and pursue international expansion beginning in Portugal. Mixergy raised £9.2M in the disclosed funding round. Mixergy develops residential smart hot water tanks that use machine learning and engineering to heat only the water a user needs. Its tanks can save residents up to 20% on hot water bills, provide up to 30% more usable hot water, and deliver hot water up to five times faster. The product is the first hot water product certified to deliver grid‑balancing services to the UK National Grid and can be controlled via sensors and software across a national network dubbed the “Internet of Tanks.” Mixergy is a 2014 spin‑out from the University of Oxford’s Energy and Power Group and has partnered with British Gas to launch and roll out products to households. The company says it plans to expand across the UK, Western Europe and North America and to leverage low‑cost manufacturing supply chains to address a global market.

Total raised

$32M

Funding rounds

3

Latest round

Equity

Latest activity

Mar 2025