| 摘要 |
[Problem] To provide an electricity storage system in which an existing system interconnection device can be used to build a solar power generation system that uses a storage cell and a solar cell jointly. [Solution] An electricity storage system provided with a storage cell (30), for supplying the output of the storage cell (30) to a system interconnection device (2) for converting the output power of a solar cell (1) to alternating-current power and outputting to a commercial power system (5); the electricity storage system characterized in comprising: a charging circuit (31) for charging the storage cell (30); a line (7) for connecting the solar cell (1) and the system interconnection device (2); a discharging circuit (31) for discharging from the storage cell (30) to the system interconnection device (2), the discharging circuit being connected to the storage cell (30); and a power outage detection circuit (33) for detecting a power outage in the commercial power system (5); discharging from the storage cell (30) to the system interconnection device (2) being enabled when a power outage is detected by the power outage detection circuit (33). |
