How to enable Volt-Var / Q(U) function

Modified on Fri, 4 Aug, 2023 at 10:14 AM

The Q(U) function can be enabled on the inverter screen, for EN50549 grid standard 

Advanced Setting -> STD.Mode Settings –> Working Mode -> Set Mode 2: Volt-Var


Inverter will change the reactive output power based on the grid voltage. Q(U) and the voltage control point can be adjusted. 


Default values are as below.


Voltage 1: 213V (210V-230V)

Voltage 2: 223V (210V-230V)

Voltage 3: 236V (230V-255V)

Voltage 4: 246V (240V-265V)


The Volt-var function can support max 60% reactive power (0.8 leading - 0.8 lagging)


Leading: +48% (0%~+60%)

Lagging: -48% (-60%~0%)


Additionally, you can set two values for active power levels that shall be configurable both at least in the range of 0 % to 100 % of Po. 

than lock-outThe P lock-in value turns the Q(U) mode on, the lock-out value turns Q(U) off.  lf P lock-in is larger than P lock-out a hysteresis is given.



A diagram of a circuit

Description automatically generated


Default values:


Plock-in: 20%

Plock – out: 5%

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