Size; Working Principle; Communication - Soleil SRT 75K User Manual

⚫ When checking and repairing, place the DC switch to OFF position and wait for 30 minutes. Use
a multimeter to measure the DC bus voltage inside the inverter. Repairing work can be executed
ONLY when the voltage is lower than 10V.

2.2.4 Size

Figure2-7 Size (unit: mm)

2.3 Working Principle

The PV string input is connected to the inverter, and the maximum power point for the PV string is
tracked through the internal 9 (SRT family ) or 10 MPPT (SPX family) circuits, to achieve the
maximum power output of the PV string, and then the conversion of DC power to three-phase AC
power is realized through the inverter stage, as shown in Figure2-8.
( + )
( – )
MPPT1
( + )
( – )
( + )
( – )
MPPT9
( + )
( – )
Figure2-8 Working principle diagram

2.4 Communication

The inverter has multiple communication methods, including RS485 communication, Bluetooth
communication (SRT 125K model only), WIFI/GPRS communication (optional), and PLC
communication (optional). Users can easily obtain the current operation data of the inverter.
IV438E REV.01 Issued: 2022/11/09
DC/DC1
Input
EMI filter
DC/DC9
SPD
GND
User Manual Soleil SRT/SPX 75K-150K
HCT
C
HCT
DC/AC
HCT
C
L1
L2
Output
EMI filter
L3
PE
L1 L2 L3
SPD
GND
Pag. 18 of 74 +FR