I read the application note here: http://www.global-download.schneider-electric.com/852577A4005D7372/all/8 FA29D94B918A0FB8525781F0072FCA7/$File/ac-coupling-app-note(976-0240-01-0 1_rev-a).pdf
...and I contacted Xantrex to make sure the application note applies to other brands of grid-tie inverters. It does according to the rep I spoke with. I just wanted to find out if there is any real world experience out there with Enphase and the XW series AC coupled. I have a customer with three XW4024's in single phase configuration set up as a battery backup only now. He wants to add up to 10kW. I suggested Enphase as an AC coupled system (mainly due to the distance to the proposed array). I'm aware of the pitfalls noted in the application note regarding high limit shutoffs. Any thoughts? Jason Szumlanski Fafco Solar
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