Yes, there are three scenarios when a generator provision is available at a home and if that provision needs to be continued even after installing SMART devices.

\n\nScenario-1: All appliances in a room are given generator back up, i.e., every appliance, in the room like lights, fan and plug points are given generator back up.
\n\nConnection: Simply connect the phase wire of Generator instead of phase of Mains to the Phase point of SMART device (marked with P on the device).

\n\nScenario-2: Partial appliances in a room are given generator back up, for e.g., one light and a fan in the room have provision for generator back-up and not all appliances in the room. This is the most typical scenario in Indian households.
Connection: All the loads connected to the SMART device will be operated with generator. Select all the loads you want to control with the generator and insert only those load wires into SMART device. And insert generator phase into the Phase point of the SMART device. If you cannot operate all the loads with generator, in that case we recommend you keep the generator loads separate and connect only the loads without generator into SMART device. In that case, insert phase of Mains line into the Phase point of SMART device. You can also buy a separate SMART product (1 Switch/2 Switch) for controlling loads only with generator and connect that device to generator operated loads\n

\nScenario-3: When there is AC in the Room\nAC's are generally not provided generator back up\n\nCaution: You should never connect any two phases to one SMART Device in any instance whatsoever.\n