Originally posted by kny
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http://enphase.com/sites/default/fil...eration_NA.pdf
page 41.
If that is all set up right, I would strongly encourage you to measure line voltage when as many of the inverters are operating as possible. If voltage has moved significantly from what it was with zero inverters, your grid connection may not like being unbalanced and/or may not be able to accept the power you are trying to feed.
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