enphase IQ8D-72-E-US Design Manual page 89

Scenario 4: An IQ8D System with 41 Microinverters has 5 AC branch circuits of varied sizes and has used 7.9 ft QD Cable
SKU QD-12-20-135 with end feeding of AC branch circuit.
The following system diagram explains how QD Cable rotation impacts the phase balance across the system when the
number of Microinverters in IQ8D system are not multiples of 3. Similar methodology can be used for any system size
when an AC branch circuit is end fed and has a varied number of IQ8D Microinverters (maximum of 9) in the branch circuit.
Figure 74: Phase balancing using QD Cable phase rotation when using QD Cable QD-12-20-135
(7.9 ft Cable) and branch circuit of varied sizes
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