Inverter protection [RE-wrenches]

[Doug McCorkle]

I have a question for the expertise of this group.  We are in the final
throws of completing a system (2 racks of 4 ASE 300W modules on trackers and
3000W Whisper (I think), 2 Trace 5548s for 240V on a Trace Power Board,
about 2000 Ahr battery bank, 20Kw generator, purchased as a package from
Kiocera ("It will take an electrician only a few hours to get it up and
running!")).  The power inputs (PV and wind) are connected to the inverter
side of the 250A battery disconnects, which is our question.  It seems to
leave the inverter unprotected - you're able to isolate the batteries, but
to isolate the inverter you need to turn off the PV and wind input
separately.  This would seem to make sense, but it seems that an inattentive
or inadequately trained homeowner might easily turn off the battery main,
thinking they were disconnecting power to the inverter, when in fact the PV
and wind would still be powering the units.  We actually did this (left only
the wind connected), and one of the inverters smoked.  So, I would
appreciate any thoughts and/or remedies.
Doug McCorkle
Sunnyside Solar

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