The engine that coughs purified air … There is no gasoline and its only emanation is a cold air, purer than the one that entered it.

The storage of electricity is and will be one of the major stakes of the energy of the 21st century. The increase in performance and the lowering of the costs of photovoltaic energy makes it the most natural source of energy of the future, but without the ability to store this intermittent energy it is not possible to exploit the potential.