3. Stationary energy applications

Electrical energy has obvious advantages for many applications. However, it does not lend itself easily to large-scale storage. Several storage techniques are known and used. For example, batteries or supercapacitors can be used. These devices enable electrical energy to be restored on demand. They are frequently used to power low-power devices, often mobile or portable. They are also useful for medium-power applications, but their profitability is questionable when it comes to high-power applications. Hydrogen can also be used to store electrical energy, with the advantage that it can be used in a variety of ways. For example, it can power electric vehicles equipped with fuel cells. A stationary fuel cell can also be used to restore electrical energy. This is particularly useful when the primary energy is not available continuously over time (as in the case of photovoltaic panels that are...