Photovoltaic inverters usually work under high voltages and generate lot of heat. To better dissipate the heat, the inverter casing needs to be of proper thickness and with good thermal conductivity. However, high internal temperature often creates huge pressure, exerting force on the casing. In order to balance the pressure, channels connecting to the outside world are usually deliberately created. But this may leave the inverter vulnerable to the invasion of dust and rainwater, which may cause damage to electrical components, and explosion in the cavity. IPRO venting products are waterproof and dust-proof, and can equalize pressure and prevent sealing structure failures, as well as casing deformation, thus improving the long-term reliability and service life of photovoltaic inverters.