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5.5 NEM Integrity Mode <br />NEM Integrity Mode ensures that the power exported by the Enphase Energy System across all phases <br />—i.e., the aggregate power—to the grid does not exceed the power being produced by the existing PV <br />system. <br />The Enphase Energy System continuously monitors the aggregate exported power at the point of <br />measurement—either the Consumption CTs or the IQ Meter Collar—and controls the power produced <br />by the PV and Battery system to keep the exported power below the limit set by the installer. <br />NOTE: When NEM Integrity Mode is enabled, the ESS mode must not be set to Export-only, as <br />the system will not export beyond the point of common coupling (PCC), i.e., the grid. <br />NEM Integrity Mode is supported in both grid-tied configurations (Solar + Battery or Solar-only) and <br />grid-forming configurations (Solar + Battery). <br />For all supported SKUs with aggregate power export limits, see Enphase Power Control in a grid-tied <br />Enphase Energy System on page 4. <br />5.5.1 NEM Integrity Mode in grid-tied configuration <br />In this configuration, the aggregate export power (Wexport) to the utility grid is monitored through the <br />Consumption CTs placed on the utility/grid side of the main panel. The power produced by the PV <br />and/or Battery system is controlled accordingly to ensure that Wexport is less than or equal to the <br />power measured by the paralleled Consumption CTs on the existing PV system. <br />The following figure illustrates the aggregate power export limit in grid-tied configurations. <br />Enphase Power Control features <br />43 © 2025 Enphase Energy Inc. All rights reserved. August 2025 <br />TEB-00269-2.0-EN <br />Main panel <br />(Back-fed panel) <br />IQ Series Microinverters <br />IQ EV Charger <br />Connect to LC <br />CTs/Cons CTs <br />Connector <br />N <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 />Main DER <br />breaker <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 <br />( C C B ) <br />Integrated Production CT <br />Integrated Battery CTs <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 />Utility meter Grid <br />IQ Battery IQ Battery <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 />CT9, CT10 <br />(L1,L2) <br />Consumption CTs <br />Paralleled Consumption CTs <br />NEM Integrity <br />Mode <br />Integrated Backfeed CTs <br />8Home loads <br />Existing AC Coupled <br />PV System <br />CT11, CT12 L1, L2 <br />Connect to <br />LC CTs/Cons CTs <br />connector <br />8 <br />Figure 12: NEM Integrity Mode in grid-tied configuration <br />5.5.2 NEM Integrity Mode in grid-forming configuration <br />In this configuration, the aggregate export power (Wexport) to the utility grid is monitored by <br />the IQ Meter Collar, which is installed between the main panel and the utility meter. The power <br />produced by the PV and/or battery system is regulated to ensure that Wexport remains less than the <br />power generated by the existing PV system, as measured by the integrated load control CTs in the <br />IQ Combiner 6C. <br />Enphase Power Control features <br />44 © 2025 Enphase Energy Inc. All rights reserved. August 2025 <br />TEB-00269-2.0-EN