An electrical energy management method for storage systems connectable to an electrical grid, comprising a first verification cycle for verifying a state of charge of a storage system, wherein said first verification cycle comprises:
- measuring a maximum state of charge (SOCril) at a predefined moment in time;
- if the measured maximum state of charge (SOCril) is less than a predefined value of the maximum state of charge (SOC_MAX), determining how long the maximum state of charge (SOCril) has been less than the predefined value of the maximum state of charge (SOC_MAX);
- if the maximum state of charge (SOCril) has been less for a period of time exceeding a predefined time interval, modifying a usage value of a minimum state of charge (SOC_MIN) of the storage system according to the following formula:
- The usage value of the minimum state of charge (SOC_MIN)=the predefined value of the maximum state of charge (SOC_MAX)−the measured value of the maximum state of charge (SOCril)+a default value of the minimum state of charge (SOCD);
- wherein said default value of the minimum state of charge (SOCD) is a default value of the minimum state of charge defined as per design;
- if the measured value of the maximum state of charge (SOCril) is greater than or equal to said predefined value of the maximum state of charge (SOC_MAX), comparing the usage value of the minimum state of charge (SOC_MIN) of the storage system with a default value of the minimum state of charge (SOCD) of the storage system;
- if, from the comparison between the usage value of the minimum state of charge (SOC_MIN) of the storage system and the default value of the minimum state of charge (SOCD) of the storage system, that the usage value of the minimum state of charge (SOC_MIN) is greater than the default value of the minimum state of charge (SOCD), a second verification cycle is performed comprising:
- checking a value of an electrical energy feed-in (FEED-IN) towards an external electrical grid;
- if the value of the electrical energy feed-in (FEED-IN) is greater than zero, recalculating the usage value of the minimum state of charge (SOC_MIN) according to the following formula:
- The usage value of the minimum state of charge (SOC_MIN)=The default value of the minimum state of charge (SOCD)−(the value of the electrical energy feed-in (FEED-IN)/a value of a battery storage capacity (BATT_KWH));
- if the calculated usage value of the minimum state of charge (SOC_MIN) is greater than or equal to the default value of the minimum state of charge (SOCD), emitting a signal of correct status of the storage system;
- and
- if the calculated usage value of the minimum state of charge (SOC_MIN) is less than the default value of the minimum state of charge (SOCD), emitting a signal of poor status of the storage system.