Market leading thermal energy storage for homes

Easy to install

Seamlessly integrate Sunamp into your home


More compact than traditional hot water cylinders


Instant hot water on demand

Works with a wide choice of energy sources

Sunamp heat batteries are energy saving thermal stores containing high performance phase change materials to efficiently store heat for domestic hot water systems and space heating. Up to 4 times smaller than the equivalent hot water cylinder and requiring no routine maintenance, their sleek, super-compact design means they look good in any home and free up valuable storage space.


Whether you’re planning to improve your existing property or embarking on a new self-build home project, Sunamp’s eco-friendly, safe, efficient and compact heat batteries will integrate perfectly with your preferred heating controls to deliver cascades of hot water and highly responsive space heating to your dream home.

Housing developer

Incorporate a renewable energy system into your housing projects with Sunamp heat batteries, to deliver environmental benefits, save space and improve cost efficiencies. Sunamp’s bespoke design can be tailored to meet your exact size requirements, and additional storage can easily be added further down the line.

Social landlord

Replace gas boilers and hot water cylinders, cut carbon emissions and tackle fuel poverty by introducing Sunamp thermal batteries into new and existing housing stock. Tried and tested, and already providing hot water in thousands of homes around the UK, Sunamp heat batteries require little or no maintenance, are easy to install, carry no risk of legionella and work with a wide choice of energy sources.

How it works

Two identical cupboards containing a Thermino thermal battery compared with a traditional hot water cylinder

Space-saving: up to 4 times smaller than hot water cylinder it replaces

Enables heat pump systems to be installed where otherwise they wouldn’t fit

Lower heat losses:up to 4 times higher energy efficiency

A+ energy rating: saves up to 1000kWh a year

High flow rate hot water

Instantaneously heated for hygiene and freshness

Fast and easy to install: no tundish, no discharge pipework, no T&P safety valve to maintain

No mandatory annual maintenance

Market-leading 10-year warranty on the heating element

Cutaway image showing how a Thermino thermal battery works

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