A Comprehensive Solution for Anytime Green Heat
The Caldera System provides cost-effective, on-demand heat for industrial applications. While it can tap into grid electricity, our primary focus is on utilizing affordable, nearby solar power. This approach helps companies decarbonise, while achieving lower and more predictable energy costs for decades to come.
A Comprehensive Solution for Anytime Green Heat
The Caldera System provides cost-effective, on-demand heat for industrial applications. While it can tap into grid electricity, our primary focus is on utilizing affordable, nearby solar power. This approach helps companies decarbonise, while achieving lower and more predictable energy costs for decades to come.
Facts & Figures
Fast charge in
1 hour
Output power up
to 32 MW
Storage capacity
0.8 - 200 MWh
Roundtrip efficiency
over 90%
Design life of
multiple decades
Ideal for retrofit
No combustion, no
hazardous materials
Nominal operational emissions
How It Works
Electric Boiler for Instant Heat
Caldera’s proprietary electric boiler instantly provides high temperature water or steam up to 10bar. When the sun is out, the electric boiler utilizes electricity directly from the solar PV array. Unlike traditional boilers that rely on fossil fuels, our electric boiler uses straightforward electrical elements to heat water. This simple yet effective process eliminates the need for combustion, meaning that efficiency can be over 95%. With no combustion and no moving parts, servicing requirements are also kept to a minimum.
Solar PV Array for Low-Cost Electricity
The cost of solar panels has fallen dramatically, making them an increasingly economic source of power. Many sites have the potential to go beyond rooftop solar, leasing nearby fields and installing 1 MW to tens of MW of ground mounted panels.
Local distribution grids often limit the amount of solar that can be connected. Expanding the connection is either not possible or requires costly and time-consuming upgrades. Caldera creates a separate microgrid, with only a limited tie to the site’s main electrical network. This allows for an unlimited amount of solar to be fitted. Most of the energy generated will be used to provide heat, but the large solar array is also a good source of year-round electricity for the site. This means that the Caldera System cuts both electricity and gas bills.
Steam up to 10 bar
Water up to 150°C
Thermal oil up to 200°C
Heat Cells for Stored Heat
Caldera’s most innovative technology is the ‘heat cell’, which generates heat whenever excess renewable electricity is available, storing it within a solid core. Vacuum insulation around each cell locks in heat until it is needed, at which point a small amount of steam is passed through the cells to extract energy. This steam passes through the electric boiler, which acts as a heat exchanger, providing the warmth to hot water or steam. Due to its modular design, our heat cells can easily provide sufficient energy-storage, regardless of the size of your site.
Heat cells are designed to last decades, having no phase change materials and no moving parts. Elements can be replaced should they fail, and Caldera provides a 10-year warranty. Find out more about what happens inside a heat cell.
