Sanyo Denki Sanups PV Monitor eliminates the need of having monitoring personnel at photovoltaic power system installation sites such as mega solar power generation stations. It can display the quantity of power generated and a power trend graph in real-time. When trouble occurs with the PV inverter an e-mail is automatically sent. Conversely, when a request mail is sent by the monitoring personnel, the sending personnel receives a response regarding power conditions and conditioner information.