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The IQ8 Commercial Microinverter has an ţţËã·¨ EN4 Bulkhead for DC connection and a bulkhead adapter cable (150 mm) for EN4 to Stäubli MC4 connection in the box. If the PV modules have TE PV4S SOLARLOK connectors, you may plug them directly into the IQ8 Commercial Microinverter using the EN4 Bulkhead. 

For installations where DC cables from the PV modules are unable to reach the IQ8 Commercial Microinverters, installers can order longer EN4 to Stäubli MC4 or non-terminated adapter cables. The following table lists the two available SKUs.

All QD Cable variants come with a center-tap connector positioned after every sixth Field Wireable QD Connector (male) for microinverter connection. In some sites, there could be a scenario where the starting point for a circuit is not the first connector in the circuit. Select the center-tap connector such that a maximum of nine IQ8 Commercial Microinverters are installed on each side of the center-tap connector to limit the voltage rise in the QD Cable to <1%.

The following table lists different scenarios based on the starting point of the circuit using QD Cables and the possible number of microinverters, which can be on each side of the center-tap connector.

ţţËã·¨ also offers many variants of the cellular modem based on the number of microinverters per system:

•  M1 radio (CELLMODEM-M1-06-SP-05) for sites less than 64 PCUs, data reporting every 6 hours.

•  C1 modem (CELLMODEM-C1-01-TM-05) for sites of any size, data reporting every 15 minutes.

•  The Integrator Kit with C4 router (available in H2 2024) for sites with multiple gateways.

Refer to the ţţËã·¨ compatibility calculator to check the compatibility of the IQ8 Commercial Microinverters with any PV module. IQ8P-3P is commonly paired with modules with power rating between 380 W to 640 W.

All QD Cable variants come with a center-tap connector positioned after every sixth QD connector for microinverter connection. The number of adapters used will vary with field configuration. Installers can select the center-tap connector such that a maximum of nine IQ8 Commercial Microinverters are installed on each side of the center-tap connector to limit voltage rise in the QD Cable to <1%. 

If the circuit has less than nine microinverters, the circuit shall be end-terminated, leaving the center-tap connectors unused. The Center Tap Adapter Cable provision on the QD Cable is not for microinverter connection.

The IQ8P-3P and IQ8H-3P Microinverters constitute a separate commercial product line designed specifically for three-phase installations with a neutral connection (120/208 VAC Wye).

IQ Gateway Commercial 2 (ENV2-IQC2-AM3-3P) is the only gateway compatible with ţţËã·¨ C&I microinverters. Note: The IQ Gateway Commercial 2 is incompatible with any other ţţËã·¨ microinverter series except IQ8 Commercial Microinverters (IQ8P-3P and IQ8H-3P).

No. The Raw QD Cable is a four conductor, 12 AWG and 12 AWG Neutral, 90C-rated cable without integrated AC connectors. It can be used between separated arrays or to connect to a junction box some distance from an array.

Any UL3003-certified cable, which is correctly sized according to NEC for current capacity and length, can be used.

ţţËã·¨ offers a specialized system builder tool for commercial PV systems, which helps you view system components, system overview, and essential tips. The system builder can be accessed at /installers/systems.

ţţËã·¨ has tested several types of battery systems successfully; however, each battery has site-specific configuration requirements. To discuss your use case, contact the ţţËã·¨ engineering team with your project details, proposed wiring diagrams, assumed operating parameters, and utility interconnection agreement.

The ţţËã·¨ QD Cable inventory management is different from ţţËã·¨ IQ Cable management. The QD Cable is a four-wire 12 AWG cable with built-in, auto-phase rotation and center-tapping features. For more information about cable management, contact your distribution account manager.

No. However, power balance across the connected phases may have to be achieved based on your local utility interconnection requirements.