14 Installation and Operating Instructions V01
5.2 System layout of units without integrated DC-switch
Local standards or codes may require that PV systems are fitted with an external
DC-switch on the DC side. The DC-switch must be able to safely disconnect the
open-circuit voltage of the PV array plus a safety reserve of 20%.
Install a DC-switch to each PV array to isolate the DC side of the inverter. We
recommend the following electrical connection: