PV inverters have an IP65 protection rating, which means that they are suitable for outdoor use. A proven product for labeling them are 0.8 mm thick flexible foam backed labels. The surface of the inverter is often uneven, so the plate material cannot be too rigid. Thermal print guarantees text durability and legibility for a very long time. The label can include the device number, graphics, company logo and an EAN or QR code.