[RE-wrenches] SMA Core 1 Inverter

[Darryl Thayer]

Hi i was at a SMA lecture and they said the boards are replaceable, so
hopefully a perdon never has to replace the complete unit

On Nov 6, 2017 10:08 AM, "Kelly Larson" <solarwrench at asis.com> wrote:

> …especially replacement!  The inverter weighs in at 185 lbs, so
> replacement likely will require the use of a crane on multi-story flat
> roofs.
>
> I am in complete agreement with you that putting inverters on the roof is
> not ideal.  Not only is servicing and replacement an issue, but there is no
> doubt that the inverter will run hotter sitting in the sun.  But this is
> one way to satisfy the 2014 rapid shutdown requirements, so I assume we
> will be seeing more of it.  Compared to other commercial roof rapid
> shutdown solutions that employ a contractor it seems important to consider
> rooftop inverters, as they provide potentially more reliable system
> operation in the long run.  Maybe we should be looking at lower DC/AC
> ratios for these systems?
>
> I am still wondering if anyone on the list has installed these SMA Core1
> inverters.
>
> Thanks for the comments!
> Kelly
>
> PS:  I didn’t design or install the system, but am inspecting and
> commissioning it.
>
>
> > On Nov 2, 2017, at 2:30 PM, William Miller <william at millersolar.com>
> wrote:
> >
> > Kelly:
> >
> > I see one problem:  the inverter on the roof.  Makes servicing and
> > replacement a real pain.
> >
> > William
> >
> >
> >
> > Lic 773985
> > millersolar.com
> > 805-438-5600
> >
> >
> > -----Original Message-----
> > From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On
> > Behalf Of Kelly Larson
> > Sent: Thursday, November 02, 2017 12:36 PM
> > To: RE-wrenches at lists.re-wrenches.org
> > Subject: [RE-wrenches] SMA Core 1 Inverter
> >
> > Dear estemed Wrenches,
> >
> > I will be inspecting a system with SMA’s new Core 1 inverters and am
> > wondering: What experience do you have with this inverter?
> >
> > I think it is the first inverter made to sit freestanding on a commercial
> > roof.  It looks like it has some super interesting features, including
> > “String Failure Detection”.  (Why is this feature deactivated by
> default?)
> >
> > I’m not sure how well it will satisfy the rapid shutdown requirement when
> > the roof array areas are broken up, but on one with a contiguous array
> area,
> > it looks like it’ll work for the 2014 NEC.
> >
> > Any bugs or issues I should know about?
> >
> > Thanks in advanced for your replies!
> >
> > Blessings,
> > Kelly
> >
> >
> > ~~~~~
> > Kelly Larson
> > 707-223-3209
> >
> > Box 504
> > Ukiah, CA 95482
> > Electrical Engineer
> > NABCEP Certified Solar PV Installation Professional IREC Certified Master
> > Trainer for Photovoltaic Installer CA Electrical Contractor# 868189
> > SolarKelly.com
> >
> > "Whatever you can do or dream you can, begin it. Boldness has genius,
> power
> > and magic in it."   -- Goethe
> >
> >
>
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