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When configuring the IQ Battery 10C over-subscription, as shown in the following figure, the installer <br />must input the number of IQ Battery 10C(s) and breaker sizes on the port. The Enphase Installer App <br />determines if the IQ Battery over-subscription needs to be enabled if the aggregate current from <br />IQ Battery 10C(s) on a breaker exceeds the breaker rating. <br />The Enphase Installer App shows the recommended number of IQ Batteries on each port to maximize <br />the continuous and overload currents in the system. <br />In an IQ Combiner 6C, the Enphase Installer App ensures that the maximum breaker rating for the two <br />battery breaker slots of 80 A each. <br />Enphase Power Control features <br />21 © 2025 Enphase Energy Inc. All rights reserved. August 2025 <br />TEB-00269-2.0-EN <br />NOTE: Each IQ Battery 10C unit is considered as two separate units in the <br />Enphase Installer App. In the preceding figure, four batteries on Breaker 1 is equivalent to <br />two IQ Battery 10C units and two batteries on Breaker 2 is equivalent to one IQ Battery 10C <br />unit. <br />5.1.6 Configuration of IQ Battery over-subscription through the <br />Enphase Installer Portal <br />Go to Systems > Activations > Configuration > PCS Based Limiting > IQ Battery Oversubscription. <br />When configuring IQ Battery over-subscription in the Enphase Installer Portal for grid-forming <br />configuration, as shown in the following figure, the installer must input the number of <br />IQ Battery 10C(s) and breaker sizes on each port. If the breaker sizes are insufficient to support the <br />batteries, the Enphase Installer App prompts the installer to enable the IQ Battery Oversubscription <br />feature. <br />Enphase Power Control features <br />22 © 2025 Enphase Energy Inc. All rights reserved. August 2025 <br />TEB-00269-2.0-EN