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World leading thermal storage technologies


Sunamp designs and manufactures space-saving thermal storage that makes homes, buildings and vehicles more energy-efficient and sustainable, while reducing carbon emissions and optimising renewables.

Public housing

See how to decarbonise domestic hot water in high-rise housing using our thermal batteries with heat pumps

Read more
Housing development

We’re helping developers, planners and architects incorporate our space-saving thermal batteries in renewable energy setups for housing projects

Company news
Sunamp thermal batteries launched in US in New York State Innovation Challenge award.
Commercial and industrial
Discover how to reduce carbon emissions from businesses of all sizes by using thermal storage to optimise renewable energy use
For UK installers and stockists

Plumbers, installers, stockists and specifiers, visit Sunamp’s UK information hub to find installation instructions, technical leaflets and training sessions about our range of thermal batteries.

Super-compact thermal batteries

How it works

Storing heat and releasing it on demand

Optimising renewables

Our thermal batteries support the electrification of heat.

They work with heat pumps, wind and solar, grid and microgrid electricity, waste heat, combined heat and power (CHP) and boilers.

And store 4 to 10 times more energy than conventional materials.

Sustained with Plentigrade

Sunamp’s patented Plentigrade technology stores energy in our high-performance phase change materials and releases it to give hot water, heating or cooling on demand.

Long lifespan with best-in-class reliability rating.

Wide temperature range

Plentigrade discharges at a consistent, controlled temperature.

Reliably, safely and efficiently.

This means our thermal batteries can be used to freeze (-30°C), refrigerate (5°C) or warm (58°C), and even sterilise (118°C) in many different settings.

Making homes, buildings and industry more energy efficient and sustainable

Combining low-cost materials, exceptional long-life and recyclability, our energy-dense batteries deliver a low-carbon solution for freezing, cooling, heating, steam, and hot water.

About us

Sunamp’s vision is of a world powered by affordable and renewable energy sustained by compact thermal storage. Our mission is to transform how heat is generated, stored and used to tackle climate change and safeguard our planet for future generations.

We’re a global company committed to net zero and headquartered in the United Kingdom. Recent expansion includes offices in New York and Zurich.

Latest news

Householders can save £485 on the cost of hot water energy bills by switching to heat batteries
New video on how phase change materials heat hot water in homes
Sunamp wins prestigious chemistry innovation award

Contact us

We would love to talk to you about how you can use Sunamp thermal batteries to improve energy efficiency and reduce carbon emissions.

Contact us