| 摘要 |
PROBLEM TO BE SOLVED: To provide a contract capacity calculation system not requiring installation of measuring apparatus.SOLUTION: An arithmetic unit 32 calculates the peak current value of a housing 10 from the number of residents of the housing 10, the number of household electrical appliances 20 used in the housing 10 and having a rated current larger than a predetermined level, and the rated current during charge of a vehicle 50 charged with the system power 12 supplied to the housing 10. If the peak current value thus calculated exceeds the contract capacity of the system power 12 of the housing 10, a contract capacity appropriate for the housing 10 is calculated depending on the difference between the peak current value and the contract capacity. Furthermore, the arithmetic unit 32 includes a display for displaying the contract capacity thus calculated. |
