What is 1414 Degrees?

1414 Degrees is aiming to fill the critical gap for low cost, environmentally friendly energy storage.

Our patented Thermal Energy Storage System (TESS) takes electricity from any source, the grid or renewables, and stores as latent heat in molten silicon at 1414° Celsius.

Latent heat is energy that is held in a phase change material when it becomes molten. Silicon’s very high melting point, 1414° Celsius, means it can hold much more energy than other phase change materials. It delivers maximum energy efficiency.

The energy from the latent heat is passed through an energy recovery system and a turbine to dispatch heat and electricity when required. It transforms intermittent renewable electricity by providing reliability and stability identical to that of a coal or gas fired power station.

The system will last at least 20-30 years and works at its optimal capacity when constantly active. It is designed for minimal maintenance and is environmentally benign.

The result is low cost and clean storage of energy providing a stable supply for heat consumers and to the grid – a critical requirement as renewable generation increases.

1414 Degrees, how TESS works
1414 Degrees, how TESS works
1414 Degrees, how TESS works

What is 1414 Degrees?


a patented thermal energy storage system (TESS) storing energy as latent heat in molten silicon


sizing of systems from 10 to 100’s of megawatt hours for grid, off-grid and co-generation sites


low maintenance, low cost and low impact compared to lithium-ion batteries


energy is stored as latent heat at 1414°C providing maximum efficiency of energy output


the use of abundantly available silicon ensures its sustainability and its affordability


low environmental impact with no emissions and no combustion

Grid and off-grid

each system can store several hundred megawatt hours suitable for grid, off-grid and co-generation installations


wide range of uses in district heating, industrial complexes and shopping centres as well as grids