- Octopus enters the home battery market with two different systems: Nook Cube and Nook Colossus
- Renters receive the Nook Cube, a plug-in battery that requires no installation work
- Owners get Nook Colossus, which can be expanded to a substantial 30 kWh capacity
Octopus Energy has introduced a new range of home batteries called Nook, aimed squarely at the home storage market.
Announced at the company’s recent Energy Tech Summit, the range includes two distinct products designed for different types of customers.
One option is aimed at the more than 10 million renting households and tenants in Britain, while the other suits landlords looking for a permanently installed system.
Two battery systems designed for different homes
Octopus says the plug-in option for renters, called the Octopus Nook Cube, is a compact 2 kWh battery the size of a shoebox that plugs into any standard wall outlet.
Customers can add additional units through the Octopus app, allowing total storage to increase up to 10.5 kWh over time.
For homeowners, Octopus is launching an engineer-installed, wall-mounted system called Octopus Nook Colossus, available in 5kWh and 10kWh configurations.
Larger homes can stack additional units to reach a maximum capacity of 30 kWh, positioning it as a true rival to Tesla’s Powerwall line.
Both systems work alongside existing solar panel installations and come with a standard 12-year warranty.
Unlike many existing systems, the battery plugs directly into a standard household socket without the need for engineer installation or modifications to the property.
Octopus plans to start selling the batteries next year in the United Kingdom, Germany, France, Italy and Spain.
That timeline means households expecting immediate alternatives to Tesla Powerwall products will have to wait until at least 2027.
Savings claims are based on existing smart tariffs
Home batteries store electricity when prices fall before releasing it later when rates become significantly more expensive for consumers.
Octopus says customers can increase savings even further by combining battery systems with their own smart electricity plans and rates.
According to the company, those tariffs have already helped customers collectively save almost £1 billion on energy costs.
“Home batteries are a brilliant technology and one of the smartest ways to reduce energy bills right now,” said Greg Jackson, founder and CEO of Octopus Energy Group.
“Offering Octopus batteries to our customers is a big step in our mission to help people take advantage of the cheapest energy possible.”
Demand for internal storage has reportedly accelerated due to instability in the Middle East and increasingly unpredictable energy prices around the world.
Across the UK, Spain and France, Octopus says it has already installed almost 26,000 solar and battery systems.
This launch makes Octopus the first major British energy supplier to sell its own range of batteries directly to customers.
It remains uncertain whether a delayed arrival will hurt enthusiasm, although rising energy costs may leave little shortage of interested buyers.
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