World leading thermal energy storage technologies


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

Hot water solutions – Thermino heat batteries for hot water

Our Thermino heat batteries are a space-saving, energy-efficient alternative to direct and indirect hot water cylinders

Read More
Product brochure, manuals and data sheets

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

Social housing in the UK
See how domestic hot water is decarbonised in high-rise and low-rise housing with our proven heat batteries
Housing development
Improve the energy rating and maximise the living space in the new build homes
For homeowners
Search our list of approved stockists and installers who can fit the Thermino hot water product range in your home for you

Super-compact heat batteries

How It Works..

Storing heat and releasing it on demand Optimising renewables

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 in the UK

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 based in the UK. We design and manufacture our thermal battery products at our UK headquarters near Edinburgh. Here, we have our factory, research and development labs and customer training centre.

We are an ambitious, imaginative business that’s growing fast. Recent expansion includes offices in New York and Zurich.

Trade association memberships

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