Tigo EI Inverter Manual

Installation manual for the Tigo EI Inverter, including instructions for the EI Battery, ATS, and Energy Meter

Connecting the PV Strings

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Tools required: 1/8” flathead screwdriver, #2 Philips screwdriver, cable ties

Figure 39 PV Connections
Figure 40 EGC Ground bus connections

1)   Turn the DC disconnect to OFF.

2)   Insert the ground conductor into the ground bus and tighten the set screw to 1Nm.

3)   Insert the 1/8” flat screwdriver into the square hole above the conductor terminal and press to release the clamp.

4)   Insert the string conductor into the appropriate terminal block round opening according to the terminal block label (PV+1/2/3/4,PV-1/2/3/4).

5)   Remove screwdriver to clamp the conductor.

6)   Gently tug to ensure the conductor is securely connected.

Figure 41 PV string connections

7)   After terminating each string, verify the polarity between the input terminals. Note the voltage of each string.

8)   Repeat steps 3-7 for all strings.

9)   Dress conductors with cable ties, ensuring even bends and sufficient strain relief.  

The DC voltage of each string must be less than 600VDCunder any operating condition. Depending on the model of TS4 installed, the PV string voltage will be either the operating voltage, or a safety voltage.

The TS4-A-F will output 0.6V per module in safety mode. To know the number of modules connected in series divide the measured string voltage by 0.6V.

The TS4-A-O models output full string voltage before they are commissioned with the inverter. After which, these models will enter rapid shutdown only when the rapid shutdown command is initiated.