A selection of batteries for the frequency reserve market

A battery used in the frequency reserve market should have a relatively high capacity compared to the battery capacity. A 1C rating (power = capacitance) is ideal, but a 0.5C rating (power = ½ capacitance) is also suitable.

Such a configuration allows the battery to be quickly charged or discharged in the most efficient manner according to the offers made on the frequency market and their activation by the system operator. The battery participating in the frequency market is kept at a 50% capacity level, because in this way the battery can be quickly used both in the direction of consumption and production according to the needs of the frequency market.