Energy store for a photovoltaic system, energy storage power plant, control device, and method for operating an energy store

An electrochemical energy store having a capacity with different states of charge that are controlled by a control device of the energy store, the electrochemical energy store comprising:

• a first capacity range for feeding into a power grid;
• a second capacity range for a consumption by coupled consumers and for feeding into the power grid;
• a third capacity range for feeding into the power grid;
• a fourth capacity range that is blocked;
• and
• a fifth capacity range that is blocked.

An energy storage power plant, comprising:

• a plurality of electrochemical energy stores, each electrochemical energy store having a capacity with different states of charge, wherein the electrochemical energy store includes:
• a first capacity range for feeding into a power grid,
• a second capacity range for a consumption by coupled consumers and for feeding into the power grid,
• a third capacity range for feeding into the power grid,
• a fourth capacity range that is blocked, and
• a fifth capacity range that is blocked;
• and
• a central control device coupled to the plurality of electrochemical energy stores, wherein the central control device sets one of a positive and a negative energy quantity for feeding into the power grid for a time window at a specific time at least one of for an individual electrochemical energy store and for a group of the plurality of electrochemical energy stores.

A method for operating an electrochemical energy store having a capacity with different states of charge that are controlled by a control device of the energy store, the electrochemical energy store including a first capacity range for feeding into a power grid, a second capacity range for a consumption by coupled consumers and for feeding into the power grid, a third capacity range for feeding into the power grid, a fourth capacity range that is blocked, and a fifth capacity range that is blocked, the method comprising:

• measuring an actual state of charge of the electrochemical energy store;
• setting one of a positive energy quantity and a negative energy quantity of the electrochemical energy store for feeding into the power grid for a time window at a specific time;
• and
• adjusting the actual state of charge of the electrochemical energy store, using the first capacity range, the second capacity range, and the third capacity range of the energy store, at the specific time in such a way that the one of the positive energy quantity and the negative energy quantity for feeding into the power grid is providable by the energy store for the time window at the specific time.