Not to muddy the waters, but how does the SMA system deal with 690.12
Rapid Shutdown requirements in OG and GTB arrangements? 690.12 has been
killing battery based projects left and right here in Colorado.
Thanks,
R. Ray Walters
Chief Technical Officer, RemoteSolar.com
BS Mech Engineering, 1988
Former NABCEP Certified, 2004-2016
Licensed Master ELectrician, Colorado
303 505-8760
On 3/25/17 6:46 PM, Jeff Clearwater wrote:
Hi Howie,
So Jay found this from previous posts (below). So apparently the -40
series will work in Off-grid mode (as long as you program the SBs
separately to be in OG) but won't do the switching of modes necessary
for grid-tie backup. I plan on a call to SMA tech support Monday
morning to get to the bottom of what exactly is lost without the RS485
comm. And to see if TLs are still going to work as the new SIs tech
sheet shows they are not supported. why I have no idea but I intend
to find out.
hope that helps.
Best,
Jeff
Begin forwarded message:
*From: *Drake <drake.chamber...@redwoodalliance.org
<mailto:drake.chamber...@redwoodalliance.org>>
*Subject: **Re: [RE-wrenches] SMA US 40 & AC coupling*
*Date: *March 13, 2017 at 10:23:56 AM PDT
*To: *RE-wrenches <re-wrenches@lists.re-wrenches.org
<mailto:re-wrenches@lists.re-wrenches.org>>
*Reply-To: *RE-wrenches <re-wrenches@lists.re-wrenches.org
<mailto:re-wrenches@lists.re-wrenches.org>>
I talked with Tim at SMA today, and the new Sunny Boy inverters
will provide taper charging with the Sunny Islands even though no RS
485 communication is available. The Sunny Boys need to be programmed
in the off grid mode, and the Sunny Islands will take care of the UL
1741 requirements.
The graph below shows the relation between frequency shift and %
power produced by the Sunny Boy inverters.
Emacs!
Drake Chamberlin
/Athens Electric LLC
OH License 44810
CO License 3773
NABCEP Certified Solar PV
740-448-7328
/http://athens-electric.com/
At 11:36 AM 3/10/2017, you wrote:
I just checked with SMA and they do not have an RS485 card for the
-40 inverters. What this means is that you can set them up to be
permanently in off grid mode where the SB will follow the frequency
shift of the SI, ok for an off grid system. But for grid tie with
backup, the SB will not communicate with the SI and will not change
the SB to off grid mode. It will still work like other generic AC
coupled systems where the frequency shift will cause the SB inverter
to drop off line, but as far as I know no throttling back will happen.
Brad
Howie Michaelson wrote:
I'm confused. Does this mean the -40 series are not compatible with
SI off grid mode? Or they don't adjust output due to frequency shift?
Or?
Howie
Howie Michaelson
NABCEP Certified Solar PV Installer™
Sun Catcher
Renewable Energy Systems Sales and Service
VT Solar Electric Incentive Partner
802-272-0004
On Mar 25, 2017 7:59 PM, "Tump" <t...@swnl.net
<mailto:t...@swnl.net>> wrote:
Jeff the bad news is yer outa luck BUT they "had a work around"
that was discussed on the list a few weeks ago. I looked quickly
but didn’t see it posted. You were going to install a RS 485
card/ module that had the soft ware to make it work. I found this
out just as these “Newest latest n greatest inverters" were just
coming out, looked at the manual, and much to my disappointment I
had to send it back and educate my salesperson to this. Lucky for
me I was able to get the TL series. Ill keep on looking, if you
don’t have any luck I do have a contact at SMA…. at least he was
there 2 weeks ago, contact me off list. Tump
On Mar 25, 2017, at 12:10 PM, Jeff Clearwater
<je...@villagepowerdesign.com
<mailto:je...@villagepowerdesign.com>> wrote:
All,
Can anyone confirm for me that the SUNNY BOY 3.0-US / 3.8-US /
5.0-US / 6.0-US / 7.0-US / 7.7-US series is or is not supported
by the Sunny Island in off-grid AC coupling mode? The technical
paper on the subject here
http://files.sma.de/dl/7910/SB-OffGrid-TI-US-en-18.pdf
<http://files.sma.de/dl/7910/SB-OffGrid-TI-US-en-18.pdf> does
not list them but I'm hoping it's cause that paper is dated Feb '16.
I sure hope they are because that paper shows they discontinued
support the the SUNNY BOY 3000TL-US / 3800TL-US / 4000TL-US /
5000TL-US / 6000TL-US / 7000TL-US / 7700TL-US series! Why!??
Hope you have good news for me!
Best,
Jeff
--
Jeff Clearwater
Village Power Design
Renewable Energy Design & Installation
Ecovillage Design Consultant
Licensed Solar Contractor in CA - C-46
www.villagepowerdesign.com <http://www.villagepower.com/>
413-559-9763 <tel:%28413%29%20559-9763>
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Jeff Clearwater
Village Power Design
Renewable Energy Design & Installation
Ecovillage Design Consultant
NABCEP™ Certified Solar PV Installer
Licensed Solar Contractor in CA - C-46
www.villagepowerdesign.com
413-559-9763
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