[RE-wrenches] SMA US 40 & AC coupling

Drake drake.chamberlin at redwoodalliance.org
Mon Mar 13 10:23:56 PDT 2017 

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/>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
>
>On Fri, Mar 10, 2017 at 6:12 AM, Drake 
><<mailto:drake.chamberlin at redwoodalliance.org>drake.chamberlin at redwoodalliance.org> 
>wrote:
>I talked to SMA tech support. They said the 5.0 
>and 6.0 models were compatible with AC coupling. 
>AEE supplied the SI 485PB NR Piggyback card with RJ 45 cable.
>
>At 06:45 AM 3/10/2017, you wrote:
>>Well my supplier was not aware of any 
>>additional part# for this purpose. Nor was 
>>their anything in their manual stating compatibility.
>>Part# PLEASE, It does seem short sighted of the 
>>company who pioneered AC Coupling to no longer 
>>provide us w/ equipment for said ACC.
>>>On Mar 9, 2017, at 8:47 AM, Drake 
>>><<mailto:drake.chamberlin at redwoodalliance.org> 
>>>drake.chamberlin at redwoodalliance.org> wrote:
>>>
>>>I was told by SMA tech support that the new 
>>>SMA US 40s were compatible with AC coupling. I 
>>>was provided with interface cards for the purpose.
>>>
>>>At 04:21 PM 3/8/2017, William Miller wrote:
>>>
>>>What are the limitations of the new SMA inverters?
>>>
>>>Drake
>>>
>>>
>>>>Wrenches:
>>>>Â
>>>>As a caution:  The TL22 inverters have 
>>>>been discontinued.  The TL40s have some 
>>>>limitations as compared to the TL22s, in my 
>>>>opinion.  You may still find TL22s on the shelf.
>>>>Â
>>>>William
>>>>Â
>>>>Â
>>>><28a7dc11.jpg>
>>>>Lic 773985
>>>><http://www.millersolar.com/>millersolar.com
>>>><tel:(805)%20438-5600>805-438-5600
>>>>Â
>>>>From: RE-wrenches [ 
>>>><mailto:re-wrenches-bounces at lists.re-wrenches.org>mailto:re-wrenches-bounces at lists.re-wrenches.org] 
>>>>On Behalf Of Tump
>>>>Sent: Wednesday, March 08, 2017 1:13 PM
>>>>To: <mailto:findsolar at herzfeld.org>findsolar at herzfeld.org; RE-wrenches
>>>>Subject: Re: [RE-wrenches] Aquion Batteries
>>>>Â
>>>>I have dual Sunny Islands & dual SB 
>>>>4000TL22US Â w/ 20 stack on one and another 
>>>>site w/ the Aspen 48M w/ Schneider. I 
>>>>will say this; cost per amp hour of storage 
>>>>Â sucks w/ the Aquion batteries. Both my 
>>>>client and I feel, that the batteries, 
>>>>despite there size have very little capacity. 
>>>>The “30†%DOD, that I haI have the SIs 
>>>>set to start the Gen set, charges the stacks 
>>>>OK but one gets better performance from  
>>>>charging w/slower solar source. The Aspen48M 
>>>>is ~ 42X28X42†@563 AH of capacity, UnigyII 
>>>>2000 Ah ~ 42x40x6̢۪ tall. Batteriesies are 
>>>>defiantly temperature sensitive, operating 
>>>>should be ~ 60*. The set up w/ the SMA 
>>>>product, adds additional cost due to the 
>>>>required  BM200 AND  the Sunny Island 
>>>>Interface Device, and the SM100 unless you 
>>>>are buying theAspen48M which comes pre wired. 
>>>>(Aspen 48M which comes thru w/ the sensing 
>>>>module installed).  It is quite helpful, 
>>>>if this is an off grid install due to the 
>>>>fact that the BM200 needs and when things go 
>>>>south Aquion can toggle the unit off site and 
>>>>help w/ configuration &Â upgrades, to be 
>>>>connected to the internet. This install also 
>>>>needs the correct firmware to be installed on 
>>>>the SI which when  was delivered, the 
>>>>firmware  would only load into the master 
>>>>then shut down the system. Had to 
>>>>reconfigure as 2Â separate units, load the 
>>>>firm ware and then reconfigure for 2 phase.Â
>>>>I have spoken to the manufacture re/ lack of 
>>>>capacity and was told that must be my loads
. NOT.Â
>>>> >I would suggest that despite their hype 
>>>> these are quite expensive and require quite 
>>>> a bit more of labor IF you are wiring the 
>>>> un sensed stacks. And there is definitely 
>>>> a learning curve if you are using the SI.
>>>>My own system and what I prefer to push IS 
>>>>the SMA SI w/ the SMA SBs (make sure that you 
>>>>get the TL22s as the newest SB is not 
>>>>compatible for “ AC coupling†in this 
>>>>configuration) w/) w/ the Unigy II/MK line. 
>>>>(same battery) These have buss bars, stack 
>>>>vertically , the interlocking stacks is 
>>>>perfect for earthquake locations. AND are totally recyclable.
>>>>Pictures  of the SMA install & insights 
>>>>of battery installation available, contact me off line.  TUMPÂ
>>>>Â Â
>>>>On Mar 8, 2017, at 12:55 PM, Martin Herzfeld 
>>>><<mailto:findsolar at herzfeld.org>findsolar at herzfeld.org > wrote:
>>>>Â
>>>>Has anyone worked with them with a Sunny 
>>>>Island?  Space is not an issue for this client.
>>>>Martin Herzfeld, IREC Certified Master 
>>>>Trainer ™ for PV Innstallation Professional #IREC 10037
>>>>California Solaar Contractor License  #00833782  C46, D56, D31, C-7
>>>>Solar, Trenching, Pole Installation & Maintenance, Instrumentation
>>>>UL Certified PV Installer #17, OSHA 30
>>>>OSHA-Authorized Construction Trainer #C0068034
>>>>CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG
>>>>Registered NABCEP Continuing Education (CE) Provider
>>>>   Â
>>>>Â
>>>>On Jul 20, 2016 2:00 PM, "Jerry Shafer" 
>>>><<mailto:jerrysgarage01 at gmail.com>jerrysgarage01 at gmail.com > wrote:
>>>>We had a customer request them but once we 
>>>>found out how many it would take, he decided 
>>>>on the deka unigee instead. l dont like 
>>>>running my OB's at such a low voltage as they 
>>>>seem to get hotter due to the higher current. 
>>>>Some of our other product lines don't even 
>>>>reccomend aquions due to that low voltage, 
>>>>suggest asking your inverter manufacture too.
>>>>Â
>>>>On Jul 20, 2016 10:52 AM, "Drake" 
>>>><<mailto:drake.chamberlin at redwoodalliance.org> 
>>>>  drake.chamberlin at redwoodalliance.org> wrote:
>>>>Hello Wrenches,
>>>>I have a client who is going to take the 
>>>>plunge and buy a set of Aquion Batteries. 
>>>>They look pretty good on paper, but I'm not 
>>>>sure how well an inverter would function at 
>>>>the 40 V minimum. Does anyone have experience 
>>>>to recommend them or warn against using them?
>>>>Thanks,
>>>>Drake
>>>>Drake Chamberlin
>>>>Athens Electric LLC
>>>>OH License 44810
>>>>CO License 3773
>>>>NABCEP Certified Solar PV
>>>><tel:740-448-7328>740-448-7328
>>>><http://athens-electric.com/>http://athens-electric.com/
>>>>Â
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>>>>Â
>>>>Tump at swnl.net               www.SWNL.net
>>>>                
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>>>>       Serving Mid Coast Maine & Northern California
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>>>>Â
>>>>
>>>>Â
>>>>Â
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>>>                Solarwinds Northernlights     Â
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