Ignoring other factors ("string combiner/fusing box, DC disconnect,
monitoring") and assuming a $6000 increase in cost with Enphase inverters on
a 70 module system, the % increase on total cost would only be
5 to 10% ($6000/120,000 = 5%).
If you increase production by an equal % or more, it's a value proposition.
It's the production of the system that pays the bills.
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