Malta’s Electro-Thermal Energy Storage System:
A Better Way to Enable Cleaner Reliable Electricity on the Grid



The Malta system is made up largely of conventional components and abundant raw materials – steel, air, salt, and commodity liquids. The technology capitalizes on existing manufacturing and construction ecosystems in the power and oil and gas industries, making timelines to market impact short and low-risk while keeping costs low.


“Malta is an implementation opportunity, not an R&D project.”


A world-class team is developing the Malta energy storage system – a product that will provide flexible energy storage services globally.




How Does the Malta System Work?

The Malta energy storage system takes electricity, converts and stores that electricity as heat, and then converts it back to electricity to be redistributed on the electric grid. In charge mode, the system operates as a heat pump, storing electricity as heat in molten salt. In discharge mode, system operates as a heat engine, using the stored heat to produce electricity.


1. Collects
Energy is gathered from wind, solar, or fossil generators on the grid as electrical energy and sent to Malta’s energy storage system.

2. Converts
The electricity drives a heat pump, which converts electrical energy into thermal energy by creating a temperature difference.

3. Stores
The heat is then stored in molten salt, while the cold is stored in a chilled liquid.

4. Reconverts
The temperature difference is converted back to electrical energy with a heat engine.

5. Distributes
Electricity is sent back to the grid when it is needed.