- This energy storage system of 4 MW power and 1.7 MWh stored energy will be set up in Melilla and will contribute to give support and safety to the autonomous city's supply, which has an energetically isolated system.
- Moreover, this is a sustainable and economic solution because a second life is offered to batteries used in electrical vehicles.
- The solution, which is pioneering in Europe, will improve guaranteed energy supply in Melilla, a city with 86,120 inhabitants, by means of instantaneous injection into the network of up to 4 MW of power for 15 minutes.
Endesa, in its bid for research into new energy storage systems with the time horizon of a new decarbonised model, has implemented development of a pioneering system in Europe on a large scale by means of recycling of “second life” electrical vehicle batteries”.
The solution, based on grouping of more than 90 interconnected batteries with controlled electronics and installed power, will have a power of up to 4 MW, with a maximum stored energy of 1.7 MWh.
The storage system will be located in Endesa’s thermal power station in Melilla, a city in which, since it is an electrical system isolated from the electrical network (like an island), measures to improve and guarantee the safety of supply are essential.
The solution could guarantee energy supply of the autonomous city, which has 86,120 inhabitants for 15 minutes or even longer, if loads lower than 4 MW are applied. Furthermore, the new Endesa project represents a more economic alternative to that represented by stationary power storage batteries and especially, more sustainable application, because it recycles batteries already used previously in electrical vehicles, thereby giving batteries a second lifetime and resolving their recycling.
The project, which is in the technological validation and evaluation of financial viability phase, will be prepared technologically for implementation before next summer and is a clear example of circular economy. First, it will significantly contribute to resolve imbalances in loss of generation in the electrical system and improved quality of supply. Second, it will lengthen the life of worn-out batteries already used in electrical vehicles with a lifetime of approximately six years, depending on their use. Given the forecasts that a robust increase in the fleet of electrified vehicles will occur in the next few years, an increase in both supply and a significant reduction in the cost of “second life” batteries is also expected.