What is the P(U) function in my inverter settings?

The P(u) Function is a volt-watt response mode required by certain national standards such as AS/NZS 4777.2. This function can control the active power of the inverter according to the grid voltage. Enable means that this function is turned on. The items in the P(u) Function interface will be adjusted in accordance with the local safety requirements and law regulations, casual modification is prohibited.