| 摘要 |
PROBLEM TO BE SOLVED: To provide an energy saving effect display system capable of accurately displaying energy saving effect by a power supply apparatus.SOLUTION: A HEMS 30 multiplies an electric charge unit cost by electric energy that is supplied from system power 12 to a power distribution panel 14 and that is measured by a trunk breaker power sensor 120, to calculate an electricity charge including effect of energy saving by a photovoltaic power generation device 16, a fuel cell 70, a storage battery 60, and a vehicle storage battery 28. The HEMS 30 multiplies the electric charge unit cost by electric energy measured by power sensors 22A, 22B, 22C, 22D, to calculate an electricity charge not including the effect of energy saving by the photovoltaic power generation device 16 etc. The HEMS 30 also displays, in a comparative manner, the electricity charge including the effect of energy saving and the electricity charge not including the effect of energy saving. |
