| 摘要 |
PROBLEM TO BE SOLVED: To prolong the lifetime of a storage battery in a power supply system having the battery by using a commercial power and a generator as the power sources. SOLUTION: The power source system 10 uses commercial power 1 and a generator as the power sources, and supplies power to a consumer electric equipment (load). The system 10 comprises the storage battery 11 and a DC mixer 13 (charging/discharging control means). The mixer 13 limits a charging speed to a threshold, in the base of charging the battery 11 from the generator 2, and distributes the excess power from the generator 2 to an electric water heater 4. In the case of supplying a discharged power from the battery 11 to the consumer equipment 3, its discharging speed is limited to a threshold, and the insufficient portion of the power to be supplied to the equipment 3 is supplemented by the power from either or both the generator 2 and the commercial power 1.
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