
Thermal Domestic Hot Water Battery
SUNAMP is an innovative thermal domestic hot water battery that allows for low-cost, instant hot water heating.
SUNAMP charges its phase material in off-peak electrical hours and discharges heat to the hot water on demand.
The hot water batteries maximize the use of renewable energy and can be charged by heat pumps and grid electricity.
Their compact design fits under counters or in closets, saving space. No water storage means no leak risk.
Ideal for retrofitting existing hot water systems and specifying for use in new build projects. Installation requires simply a water source and a plug.
Thermal Heat Battery Solution
Heat batteries are a thermal energy storage solution that provide instant domestic hot water and replace hot water cylinders.
Direct Cylinder Replacement

Thermino ePlus works with grid electricity and with solar PV by adding the Optimino PV key.
Indirect Cylinder Replacement

Thermino xPlus can work with boilers, heat pumps and solar PV by adding the correct Optimino key.
Why use a thermino thermal battery for hot water?
10-year warranty for products using Plentigrade P58 purchased and installed in the UK. Applies to the heating element & storage core part.

Unlock renewables. save space.
Our heat batteries are up to four times smaller than standard hot water tanks due to our energy-dense phase change material, Plentigrade. This allows heat pump systems to fit where they normally wouldn’t.
Add solar Pv at any time.
Thermino technology is futureproof, offering an easy and affordable upgrade to low-carbon efficiency with Optimino. It increases self-consumption and reduces reliance on the grid.
Less heat loss. increase savings.
Depending on the age of your hot water cylinder, you could be losing 1.344–3.336 kWh of heat daily. The Thermino range has minimal heat loss, less than a quarter of a conventional cylinder.
Explore Gigawatt’s Energy Efficiency Equipment
Gigawatt’s equipment improves system efficiency, reduces energy use, and supports sustainable performance in modern industrial applications.