Sungrow SG250HX-IN-20, User Manual

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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 maximum voltage of each string is always less than 1500 V.
•
Mixed use of different brand or model of PV modules in a PV string or a
compromised PV string design composed with PV modules from rooftoops
of different orientation may not damage inverter but will cause system bad
performance!
•
Make sure the maximum short circuit current on the DC side is within the
permissible range.
5.7.1 PV Input Configuration
As shown in the figure below, the inverter is provided with multiple PV inputs: PV inputs
1~12; and each PV input is designed with an MPP tracker.
Each PV input operates independently and has its own MPPT. In this way, string
structures of each PV input may differ from each other, including PV module type,
number of PV modules in each string, angle of tilt, and installation orientation.
Each PV input area includes two DC inputs DC1 and DC2. For the best use of DC power,
DC1 and DC2 should be the same in PV string structure, including the type, number, tilt,
and orientation of the PV modules.
5 Electrical Connection User Manual