Disclosed is a gateway apparatus for photovoltaic power generation facilities. The gateway apparatus includes a first communication portion which performs short-range wireless communication with at least one of a photovoltaic module connection board, a photovoltaic inverter, a peripheral environment sensing apparatus, a power measuring apparatus, and an energy storage system (ESS), a second communication portion which performs wired communication or wireless communication with a remote server, and a control portion which controls operations of the first communication portion and the second communication portion. Here, the control portion controls information provided from one or more of the photovoltaic module connection board, the photovoltaic inverter, the peripheral environment sensing apparatus, and the power measuring apparatus to be transmitted to the ESS.