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IQ Series Microinverters <br />IQ EV Charger <br />N13 <br />RS+GNDRS- <br />NO <br />NC <br />C <br />EIP comm. LED <br />USB1 <br />USB2 RSD LED <br />Status LED <br />Reset <br /> button <br />AP mode LED <br />AP mode button <br />Power production LED <br />Device comm. LED <br />Device scan button <br />Backfeed lugs <br />with DER relay <br />PV bus DER bus <br />DER centre <br />IQ PV2 <br />IQ PV3 <br />IQ PV1 <br />11 <br />_ <br />N <br />3 4 <br />12 <br />A1 <br />5 6 7 8 <br />910 <br />A2 <br />Combiner Controller Board (CCB) <br />Gateway <br />1 2 3 4 D 1 2 3 4 D <br />CT8(L2) <br />IQ PV4 <br />IQ B2 <br />IQ B1 <br />IQ EVC <br />PVA <br />PF <br />CT2, CT3 <br />CT1 <br />CT4, CT5 <br />CT(L1)CT(L1)CT(L2)CT (L2) <br />IQ Combiner 6C <br />Load Controller <br /> <br />B1 <br />LCB <br />CT6, CT7 <br />1 <br />1 2 3 4 D <br />2 <br />1 2 3 4 D <br />Grid <br />Backed up <br />home loads <br />IQ Battery <br /> <br />IQ Battery <br /> <br />IQ Meter Collar <br />in Form 2S <br />meter pan <br />N <br />Utility meter <br />Connect to EVSE <br />CT connector on <br />gateway <br />Integrated Production CT <br />Integrated Backfeed CTs <br />Integrated <br />Consumption CTs <br />Integrated Battery CTs <br />Non-backup <br />heavy loads <br />11 <br />Main panel <br />(Back-fed panel) <br />Figure 3: Bird’s-eye view of IQ Combiner 6C in grid-forming whole home backup configuration with the IQ Meter Collar installed <br />in a discrete Form 2S socket <br />4.2.2 Installation of the IQ Combiner 6C and Consumption Current Transformers in <br />grid-tied configuration <br />Refer to the IQ Combiner 6C quick install guide (QIG)  for detailed instructions on how to set up an <br />Enphase Power Control-enabled system in a grid-tied configuration. <br />Power Control System integration in the Enphase Energy System <br />13 © 2025 Enphase Energy Inc. All rights reserved. August 2025 <br />TEB-00269-2.0-EN <br />IQ Series Microinverters <br />IQ EV Charger <br />N13 <br />RS+GNDRS- <br />NO <br />NC <br />C <br />EIP comm. LED <br />USB1 <br />USB2 RSD LED <br />Status LED <br />Reset <br /> button <br />AP mode LED <br />AP mode button <br />Power production LED <br />Device comm. LED <br />Device scan button <br />Backfeed lugs <br />with DER relay <br />Integrated Backfeed CTs <br />PV bus DER bus <br />DER centre <br />IQ PV2 <br />IQ PV3 <br />IQ PV1 <br />11 <br />_ <br />N <br />3 4 <br />12 <br />A1 <br />5 6 7 8 <br />910 <br />A2 <br />Combiner controller board <br />Gateway <br />1 2 3 4 D 1 2 3 4 D <br />CT8(L2) <br />IQ PV4 <br />IQ B2 <br />IQ B1 <br />IQ EVC <br />PVA <br />PF <br />CT2, CT3 <br />CT1 <br />CT4, CT5 <br />CT(L1)CT(L1)CT(L2)CT (L2) <br />IQ Combiner 6C <br />Load Controller <br /> <br />B1 <br />LCB <br />CT6, CT7 <br />1 <br />1 2 3 4 D <br />2 <br />1 2 3 4 D <br />N <br />GridBackup panelBacked up <br />home loads <br />Non-backup <br />heavy loads <br />Utility meter <br />N <br />CT9, CT10 <br />(L1,L2) <br />IQ Battery <br /> <br />IQ Battery <br /> <br />Consumption CTs <br />Connect to EVSE <br />CT connector on <br />gateway <br />Integrated Battery CTs <br />Integrated Production CT <br />Connect to LC <br />CTs/Cons CTs <br />Connector <br />11 <br />8 <br />IQ Meter Collar in <br />Form 2S meter pan <br />Main panel (Back- <br />fed panel) <br />rehr <br />NOTE: The IQ Combiner 6C unit includes an integrated load controller that utilizes <br />the load controller CT connector. In this configuration, to add Consumption CTs,remove the connection to Load Control CT from the connector 8. For more details,refer to the IQ Combiner 6C quick install guide. <br />Figure 4: Bird’s-eye view of IQ Combiner 6C in grid-tied configuration with the Consumption CTs installed between the main <br />panel and utility meter <br />4.2.3 Current transformer placement for Enphase Power Control features <br />The current transformer (CT) placement for each of the features is shown in the following table. <br />Power Control System integration in the Enphase Energy System <br />14 © 2025 Enphase Energy Inc. All rights reserved. August 2025 <br />TEB-00269-2.0-EN