Surge Protection Device Type 2 Solar Panel 150VThe inverters and solar panels must be protected against surge voltages. The PV Guard 150 is rated to 40kA and 150V, ideal for low voltage solar off grid inverters. The device is compliant with PV standard EN50539 11. The din rail mounted SPD is widely used in solar combiner boxes to protect the solar panels and inverters from surges in voltage and lightning. The protection method is a high energy Varistor. Photovoltaic installations require large