[RE-wrenches] SMA US 40 & AC coupling
Bradley Bassett
bbassett2 at gmail.com
Fri Mar 10 07:36:14 PST 2017
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 <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 < 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
> millersolar.com <http://www.millersolar.com/>
> 805-438-5600 <(805)%20438-5600>
> Â
> *From:* RE-wrenches [ mailto:re-wrenches-bounces at lists.re-wrenches.org
> <re-wrenches-bounces at lists.re-wrenches.org>] *On Behalf Of *Tump
> *Sent:* Wednesday, March 08, 2017 1:13 PM
> *To:* 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  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 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 ~
> 42x40x6’ tall. Batteries 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 2 separate units, load
> the firm ware and then reconfigure for 2 phase. 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/ 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 Â
> of the SMA install &Â insights of battery installation available, contact
> me off line. TUMP   * On Mar 8, 2017, at 12:55 PM, Martin Herzfeld <
> 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 Installation 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     On Jul 20,
> 2016 2:00 PM, "Jerry Shafer" <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" < 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 740-448-7328 http://athens-electric.com/ Â
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