METHOD FOR POWER VISUALIZATION AND DEVICE FOR POWER VISUALIZATION

A house uses solar light generated electric power and external commercial electric power and consumes the electric power with a household electronics load or the like. The house includes an electricity storage device and an electric power management device. The electric power management device further has a function to calculate transition of the load electric power, transition of the solar battery generated electric power, and transition of a levered external commercial electric power during one day, classify the electric power by the power generation methods, apply a green index serving as a standardized index which is defined in advance to each power generation method to calculate an electric power green index, and display a result thereof on a display unit.