Octopus Energy launches Nook plug-in battery system
Octopus Energy launches Nook plug-in battery system
Written By
Published on
25 June 2026
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The Octopus Nook Cube is 2kWh battery that plugs into a standard socket
The Octopus Nook Collosus can be fitted onto walls of a larger home
Company trying to help customers cut energy bills
Greg Jackson unveils the Nook battery system
Octopus Energy, the biggest energy provider in the UK, has launched a new plug-in battery designed for renters as it looks to cut consumers’ energy bills.
Announced at its Energy Tech Summit, the company describes the Octopus Nook Cube as a “compact, shoebox-sized” 2kWh battery that plugs into a standard socket. Customers can add extra units to increase storage to 10.5kWh through the Octopus app.
For homeowners, Octopus is also launching Octopus Nook Collosus, a wall-mounted 5kWh battery, which can be stacked up to 30kWh for larger homes.
Both battery systems are compatible with solar panels and come with a 12-year warranty. They will be available to Octopus customers in the UK, Germany, Italy, Spain and France from next year.
Greg Jackson, founder and CEO of Octopus Energy Group, said home batteries were “one of the smartest ways to cut energy bills” and that this offering would customers “tap into the cheapest energy possible”.
Since the beginning of the US-Iran war, demand for solar batteries has been “booming” with households trying to “shield themselves from soaring, unpredictable energy prices”, the company said in a statement.
Paired with one of Octopus Energy’s smart tariffs, customers can save even more, the company said.
Written By
Maximilian SchwerdtfegerDeputy editor
Max joined The Eco Experts as content manager in February 2024 and became deputy editor in 2025. He has written about sustainability issues across numerous industries, including maritime, supply chain, finance, mining, and retail. He has also written extensively for consumer titles like City AM, The Morning Star, and The Daily Express.
He has represented The Eco Experts on national television several times, including the BBC’s Sunday Morning Live and ITV Tonight .
In 2020, he covered in detail the International Maritime Organisation’s (IMO) legislation on sulphur emissions and its effects on the global container shipping market as online editor of Port Technology International.
He also explored the initiatives major container ports and terminals have launched in order to ship vital goods across the world without polluting the environment.
Since then, he has reported heavily on the impact made by environmental, social, and governance (ESG) practices on the supply chain of minerals, with a particular focus on rare earth mining in Africa.
As part of this, in 2022 Max visited mines and ports in Angola to hone in on the challenges being faced by one of the world’s biggest producers of rare earth minerals.
His most recent sustainability-related work came much closer to home, as he investigated the eco-challenges faced by independent retailers in the UK, specifically looking at how they can cut emissions and continue to thrive.
Max lives in South London and is an avid reader of books on modern history. He has also recently learned to play the game Mahjong and takes every opportunity to do so. He is also yet to find a sport he doesn’t enjoy watching.
