British energy supplier Octopus Energy has launched a new range of battery storage systems for the home, including a plug-in unit aimed at renters and apartment dwellers.
The battery range was launched at the company’s Energy Tech Summit and will be available in five European markets from 2027, including the UK, Germany, France, Italy and Spain.
The launch includes the Octopus Nook Cube, a 2 kWh plug-in battery that plugs into a standard household socket and can be expanded up to 10.5 kWh via additional units. The company is also introducing the Octopus Nook Colossus, a 5 kWh wall-mounted battery system that can be scaled up to 30 kWh for larger homes.
Both products are compatible with rooftop solar installations and have a 12-year warranty. Octopus said the move makes it the first major UK energy supplier to offer its own brand of home batteries directly to consumers.
Greg Jackson, CEO of Octopus Energy Group, said: “Home batteries are a brilliant piece of technology and one of the smartest ways to cut energy bills right now. Offering Octopus batteries to our customers is a big step in our mission to help people tap into the cheapest energy.”
The company is targeting a market segment largely excluded from residential battery storage. More than 10 million households in Britain rent out their homes, limiting access to traditional battery systems that typically require permanent installation.
Home batteries allow consumers to store electricity when prices are low and use it during periods of higher rates, reducing energy costs and increasing self-consumption of solar energy.
The launch comes as demand for residential battery storage continues to grow across Europe due to volatile electricity prices and the increasing deployment of distributed solar energy.
Octopus said it has already installed almost 26,000 solar and battery systems in Britain, Spain and France.
In April 2026, Octopus Energy Generation, the clean energy investment and asset management arm of Octopus Energy, has acquired Renewable Power Capital (RPC)with the developer’s directors and registered offices transferred to Octopus entities, according to Companies House documents.
