Fellow wrenches,
I have been following the AC coupling discussions with interest, and
now have a site where this would make a lot of sense. One question
remains that I have not been able to answer by reading the archives I
have found. Since the AC circuit from the batteryless UI inverter
actually passes through the backup inverter before landing eventually
in the main panel, does the backup inverter have to have the same
listings required of UI inverters for interconnection(UL and IEEE)?
For example, in Outback's white paper, they show the backup inverter
as an off grid unit in one drawing, and grid-tie unit in another. Do
both scenarios meet the code, as the generation (PV) is connected to
a listed UI inverter? Have any of you run into trouble with AHJs
when installing these AC coupled systems for battery back up in grid
tied residences?
Thanks,
Jim Grundy
NABCEP Certified Solar PV Installer
Vermont Solar Specialist Plumber PS-279
Elemental Energy, Inc.
1750 Clark Rd
E. Montpelier, VT 05651
802-476-3441 (p)
802-476-5680 (f )
802-272-8933 (c)
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