What is the function of "smart load" in my X1-Hybrid-LV setttings?

It is related to the function of generator port on the inverter, the generator port has three options:
a. None: No device is connected to the generator port;
b. Load: The generator port is connected to a load; Under this situation, this port actions as eps port as well. And the normal EPS port load power plus this port load power should be less than the max EPS port output power.
Settings options:
a1: Smart Load Battery Off Voltage: When the voltage is below the minimum value, the battery will no longer supply power to the smart load;
a2: Smart Load Battery On Voltage: When the voltage returns to normal, the battery will supply power to the smart load again.
c. Generator: The generator port is connected to the generator; Currently this function is in developing.