Iq Gateway Commercial 2 - enphase IQ8 Design Manual

When installing the IQ8 Commercial Microinverter system using QD Cable, you may have multiple
center tap connectors in the branch circuit. Select the center tap connector such that a maximum of 9
IQ8 Commercial Microinverters are installed on either side of the center tap connector to limit voltage
rise <1% in the QD Cable. Do not exceed branch circuit sizing mentioned on Page 1 in this guide.
WARNING: Use a female three-phase field wireable connector (QD-CONN-10F) to connect
the extension cable to the 3-pole 20 A over-current protection device (OCPD) in the PV
subpanel.
WARNING: The center-tapping AC male connector is marked "Center tap" and "Do Not
Connect to Microinverter." Do not use the center-tap connectors for connecting to the
microinverter.
The center-tapping connector in the QD Cable is covered with a sealing cap. Do not remove pre-
installed sealing caps if the center-tap connector is not used for center feeding using the QD Center
Tap Adapter Cable.

2.4 IQ Gateway Commercial 2

When designing a three-phase, commercial-scale system, it is critical to install an IQ Gateway
Commercial 2 (model ENV2-IQC2-AM3-3P). IQ Gateway Commercial 2 will communicate with up to
275 IQ Commercial Microinverters for monitoring and maintenance when connected in the same
gateway communication domain.
The IQ Gateway Commercial 2 should be used solely for 208 Y/120 V three-phase applications and
provides integrated, revenue grade PV production metering (±0.5%) with included three 400 A
continuous rated production CTs and optional 600 A continuous rated consumption monitoring
(±2.5%).
The IQ Gateway Commercial 2 supports only CT-400-SOLID for production monitoring, CT-600-SPLIT
(pack of three, to be ordered separately) for consumption monitoring and should not be used with any
other type of CTs. The 400 A Production CTs support cables with a maximum gauge of 1000 KCMil,
whereas the 600 A Consumption CTs support cables with a maximum gauge of 300 KCMil. You can use
up to two parallel-connected Consumption CTs to monitor up to a maximum of two conductors. Check
that there is enough space in the load center to install CTs. Do not install CTs where they exceed 75%
of the wiring space of any cross-sectional area within the load center.
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Figure 10: IQ Gateway Commercial 2
Table 15: IQ Gateway Commercial 2
© 2023 Enphase Energy Inc. All rights reserved.
IQ8 Commercial Microinverter grid-tied PV system
November 2023
USG-00026-1.0