The continuous balancing of energy demand and supply is a fundamental prerequisite for the stability of energy grids. Photovoltaic power generation (PV) is one of the key components. Therefore, it is important to know 1) in what way and how much electricity can be generated by PV at real-time, and 2) how households' behavior can be changed by displaying their power generation and consumption with a web browser for future demand forecast. For this purpose, we monitored and created electricity generation and consumption data in households.