Tigo EI Inverter Manual

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

Battery Communications Connection

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Tools required: wire cutter, RJ-45 crimping tool, conductor labels/marking method

Supplies needed: CAT5/6, 2 RJ-45jacks, ¾” conduit and associated fittings


The EI Battery and EI Inverter must communicate to operate. This communications connection requires a CAT5/6 cable and RJ45 connectors.

The right COM conduit opening (10) is reserved for the battery communications cable which connect between the EI Inverter and EI Battery in battery installations. If installing the EI Battery, route the conduit from the right conduit opening to the EI Battery. Use appropriate conduit fittings to ensure a water-tight seal. Bond any metallic conduit, as required.

CAT5/6 cables have 8 wires (four twisted pairs). Two wiring standards exist: T-568B and T-568A, as shown below. Either standard may be used, as long as both ends of the cable use the same wiring standard.

Figure 44 RJ-45 wiring diagram

Table 7 Battery communications wiring schedule

Figure 45 Battery communications connection

1)   Using a cable cutter/stripper, remove 0.5in (1.2cm) of external insulation/jacket from the CAT5/6 cable, exposing the 4twisted pairs of wire.

2)   Untwist approximately 0.5in of the end of the wires and insert the eight wires into anRJ45 connector. Choose either T-568A or T568B standard for wiring – stay consistent. Note – the individual wires do not need to be stripped.

Figure 46 Battery connections (from EI Battery)

3)   Crimp the connector with the appropriate crimping tool.

4)   Plug the RJ45 connector into the RJ45 port on the communications board inside the inverter.

5)   Repeat the wiring process on the battery end of the cable, following the same wiring standard used for the inverter connection.

6)   Inset the RJ45 connector into the inverter COM port on the left side of the battery enclosure.