Sungrow SG25CX-P2 User Manual page 63

User Manual
Step 6 When connecting multiple optimizers, connect OUT- of the first optimizer to OUT+ of the sec-
ond optimizer, and so on. Use a multimeter to measure the optimizer voltage. If the meas-
ured output voltage is 1 V*N (N is the number of optimizers), no fault occurs to the system.
Whether connecting OUT+ of the first optimizer to OUT- of the second optimizer or
connecting OUT- of the first optimizer to OUT+ of the second optimizer is depend-
ent on the polarity of the extension cable that is connected to the inverter on site.
5 Electrical Connection
53