Pv String Connection; Pv Input Configuration - Sungrow SG33CX User Manual

5 Electrical Connection

5.6 PV String Connection

Electric shock!
The PV array will generate lethal high voltage once exposed to
sunlight.
Make sure the PV array is well insulated to ground before connecting it to
the inverter.
There is a risk of inverter damage! The following requirements should be
met. Failure to do so will void guarantee and warranty claims.
 Make sure the voltage of each string does not exceed 1,100V at all times.

The inverter enters the standby state when the input voltage ranges
between 1,000V and 1,100V. The inverter returns to the running state
once the voltage returns to the MPPT operating voltage range,
namely, 200 to 1,000V.
 Make sure the maximum short circuit current on the DC side is within the
permissible range.
 Make sure the to-ground insulation performance of the PV string is
sound.

5.6.1 PV Input Configuration

As shown in the figure below, the inverter is provided with multiple PV inputs:
PV inputs 1~n (SG33/40/50CX: n=3/4/5); and each PV input is designed with an
38
User Manual
72mm
8~12N.m