- Octopus enters the home battery market with two different systems – the Nook Cube and the Nook Colossus
- Tenants receive the Nook Cube, a plug-in battery that requires no installation work
- Homeowners get the Nook Colossus, which can be expanded to a significant capacity of 30 kWh
Octopus Energy has unveiled a new range of home batteries called the Nook, aimed squarely at the home storage market.
The offerings at the company’s recent Energy Tech Summit include two different products built for different types of customers.
One option is aimed at the more than 10 million renting households and tenants in the UK, while the other suits homeowners looking for a permanently installed system.
Two battery systems built for different households
Octopus says the plug-in option for renters, called the Octopus Nook Cube, is a compact, shoebox-sized 2kWh battery that plugs into any standard outlet.
Customers can add extra units through the Octopus app, so the total storage can be scaled up to 10.5 kWh over time.
For homeowners, Octopus is launching a wall-mounted, engineer-installed system called the Octopus Nook Colossus, available in 5kWh and 10kWh configurations.
Larger households can stack additional units to reach a maximum capacity of 30kWh, positioning it as a real rival to Tesla’s Powerwall range.
Both systems work with existing solar panel installations and have a 12-year warranty as standard.
Unlike many existing systems, the battery plugs directly into a standard household outlet without requiring an engineering installation or property changes.
Octopus plans to start selling the batteries next year in the UK, Germany, France, Italy and Spain.
This timeline means that households hoping for immediate alternatives to Tesla Powerwall products will have to wait until at least 2027.
Savings requirements are based on existing smart tariffs
Home batteries store power when prices fall before releasing it later when tariffs become significantly more expensive for consumers.
Octopus says customers can further increase savings by pairing battery systems with their own smart electricity tariffs and plans.
According to the company, these tariffs have already helped customers save almost £1 billion on energy costs.
“Home batteries are a brilliant piece of 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 harness the cheapest possible energy.”
Demand for domestic storage has reportedly accelerated following instability in the Middle East and increasingly unpredictable energy prices worldwide.
Across the UK, Spain and France, Octopus says it has already installed nearly 26,000 solar and battery systems.
This launch makes Octopus the first major UK energy supplier to sell its own battery range direct to customers.
Whether a delayed arrival affects enthusiasm remains uncertain, although rising energy costs may leave little shortage of interested buyers.
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