[RE-wrenches] Low voltage DC v. higher voltage DC

Drake drake.chamberlin at redwoodalliance.org
Fri Sep 21 08:52:30 EDT 2018 

That being said, SMA is loosing a lot of sales by 
not having a split phase Sunny Island on the 
market. It would be my unit of choice for many 
application that I have gone with other brands. 
The price of a pair of SIs is often just not competitive.

  At 12:25 AM 9/21/2018, you wrote:
>Content-Language: en-US
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>boundary="_010_DB7PR04MB4506FEAEB9C7C3E0387F51EFBB120DB7PR04MB4506eurp_";
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>
>Tump - You are right about the large number of 
>times that has been asked, and I wish I had a happy answer.
>
>However, with all the work on Sunny Boy Storage 
>and Sunny Central Storage (and even a Tripower 
>storage), resources to develop and test a split 
>phase Sunny Island are not available.  There is 
>active work on updating the communications to 
>support SMA’s Ethernet based communications.  Still, this may be months out.
>
>With the Smartformer being discontinued, the 
>MidNite MNX-240 is the recommended part to 
>create 240 split phase from one Sunny Island.
>
>Best regards –
>Mike
>
>
>SMA America
>Michael Mahon
>Technical Trainer, Solar Academy
>6020 West Oaks Boulevard, Suite 300
>Rocklin, CA 95765
>U.S.A.
>Mobile:   +1 916 918 9412
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>From: RE-wrenches 
><re-wrenches-bounces at lists.re-wrenches.org> On Behalf Of Tump
>Sent: Thursday, September 20, 2018 4:01 PM
>To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
>Subject: Re: [RE-wrenches] Low voltage DC v. higher voltage DC
>
>I bet Mike could retire from the industry if he 
>had a nickel for every time he was asked 
>for/about that. I’ve asked Santa for years

 €¦ still waiting. T
>On Sep 20, 2018, at 5:21 PM, Chris Schaefer 
><<mailto:chris at solarandwindfx.com>chris at solarandwindfx.com> wrote:
>
>Hey Michael from SMA, any chance we can finally 
>get an 240vac SI here in the states?
>
>Christopher
>
>On Tue, Sep 18, 2018 at 12:11 PM, Harry Mahon 
><<mailto:Michael.Mahon at sma-america.com>Michael.Mahon at sma-america.com> wrote:
>Marco – <
>
>I will need to ask for information about the BYD 
>availability.  Once those units have all 
>required listings/certifications and are 
>available in US, they should be ready to use 
>with SBS.  The CANBUS comms to the BMS has 
>already been vetted, and they are on the SMA 
>Approved battery list already.  But I will get 
>confirmation on the immediate usability.
>
>Best regards –
><Mike
>
>
>
>
>SMA America
>Michael Mahon
>Technical Trainer, Solar Academy
>6020 West Oaks Boulevard, Suite 300
>Rocklin, CA 95765
>U.S.A.
>Mobile:   +1 916 918 9412
><http://www.sma-america.com/>www.SMA-America.com
>
>Solar Academy: 
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>
>Full training schedule: 
><https://www.sma-america.com/partners/sma-solar-academy/seminars/trainings/training/list.html>https://www.sma-america.com/partners/sma-solar-academy/seminars/trainings/training/list.html
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>From: RE-wrenches 
><<mailto:re-wrenches-bounces at lists.re-wrenches.org>re-wrenches-bounces at lists.re-wrenches.org> 
>On Behalf Of Marco Mangelsdorf
>Sent: Monday, September 17, 2018 10:20 PM
>
>To: RE-wrenches 
><<mailto:re-wrenches at lists.re-wrenches.org>re-wrenches at lists.re-wrenches.org>
>Subject: Re: [RE-wrenches] Low voltage DC v. higher voltage DC
>
>
>Mahalo Mike.
>
>Can you tell us please when the SS will actually 
>be able to integrate the BYD battery platform in the north American market?
>
>marco
>
>On Monday, September 17, 2018, Harry Mahon 
><<mailto:Michael.Mahon at sma-america.com>Michael.Mahon at sma-america.com> wrote:
>Marco and all – yes that is the correct spec 
>ssheet for the BYD batteries that will work with Sunny Boy Storage.
>
>SMA strongly would recommend the Sunny Island 
>for off-grid in general and certainly whole home 
>backup.  See the attached from Home Power 
>April/May 2011; quad stack of SIs acting as UPS 
>for the home – just charging batteries when grid 
>is prresent, powering home with batteries/PV 
>when grid is gone.  A dual split phase cluster 
>is almost 24,000 W continuous (!) capability and 
>can handle crazy power factor loads with no 
>issues.  Built in generator functions and two 
>relay positions per Sunny Island allow for lots 
>of redundancy and fail-safe load shedding to be built in.
>
>The Sunny Boy Storage (SBS) is designed to be a 
>grid-tied inverter to allow higher self 
>consumption of local PV power.  Even with the 
>ABU to allow off grid operation (grid forming on 
>its AC outputs rather than just on the dedicated 
>120VAC Secure Power Supply outlet), there can be 
>a several second delay in the switch from grid 
>power to microgrid as the ABU must signal the 
>Sunny Boy Storage that it has disconnected from 
>the grid and that it is safe for the SBS to form 
>a grid on its output terminals.  Also be aware 
>that there is no master-slave configuration 
>ability with the SBS – they will always assume 
>they are acting independently on their energy meter input information.
>
>Best regards –
>Mike
>
>SMA America
>Michael Mahon
>Technical Trainer, Solar Academy
>6020 West Oaks Boulevard, Suite 300
>Rocklin, CA 95765
>U.S.A.
>Mobile:   +1 916 918 9412
><http://www.sma-america.com/>www.SMA-America.com
>
>Solar Academy: 
><http://www.sma-america.com/partners/sma-solar-academy/overview.html>www.SMA-America.com/partners/sma-solar-academy/overview.html
>
>Full training schedule: 
><https://www.sma-america.com/partners/sma-solar-academy/seminars/trainings/training/list.html>https://www.sma-america.com/partners/sma-solar-academy/seminars/trainings/training/list.html
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>From: RE-wrenches 
><<mailto:re-wrenches-bounces at lists.re-wrenches.org>re-wrenches-bounces at lists.re-wrenches.org> 
>On Behalf Of Marco Mangelsdorf
>Sent: Saturday, September 15, 2018 10:08 PM
>To: 'RE-wrenches' 
><<mailto:re-wrenches at lists.re-wrenches.org>re-wrenches at lists.re-wrenches.org>
>Subject: Re: [RE-wrenches] Low voltage DC v. higher voltage DC
>
>Sabaidee from Vientiane, Lao PDR.
>
>Attached is the spec sheet on the BYD battery in question.
>
>I’ve confirmed with SMA directly that 
>there’s no capability for the Sunny Storage 
>design (S.S., ABU and battery) to use a 
>generator input.  My apologies for mis-stating 
>earlier that it could accommodate a generator.
>
>As far as grid-tie with batteries, the Holy 
>Grail as far as I’m concerned is being able to 
>provide whole house back-up and not have to do 
>the old fashioned and pain in the arse critical 
>load sub-panel.  The more choices that we’re 
>provided, the more better.  So I’m pleased 
>that companies like SMA, Ensync, SolarEdge and 
>others are bringing new equipment and designs to 
>market to allow for whole house back-up.
>
>marco
>
>From: RE-wrenches 
>[<mailto:re-wrenches-bounces at lists.re-wrenches.org>mailto:re-wrenches-bounces at lists.re-wrenches.org] 
>On Behalf Of jay
>Sent: Saturday, September 15, 2018 5:00 AM
>To: RE-wrenches
>Subject: Re: [RE-wrenches] Low voltage DC v. higher voltage DC
>
>HI Harry,
>
>The battery is charged from the AC side correct?
>And is the charging algorithm inside the ABU.
>
>If so why couldn’t you use a generator to charge the battery?
>
>jay
>
>peltz power
>
>
>
>On Sep 13, 2018, at 7:10 AM, Harry Mahon 
><<mailto:Michael.Mahon at sma-america.com>Michael.Mahon at sma-america.com> wrote:
>
>Marco –
>
>The Sunny Boy Storage “Advanced Backup Unit” 
>accessory or ABU will be discussed at SPI in a 
>couple weeks – first units are being stockeed 
>now at our warehouses in US.  The ABU will allow 
>the SBS to be a grid former in case of utility 
>outage, however there are no plans to have any 
>generator inputs/controls to allow for battery charging from generat
>And yes, BYD BBox HV 5.12/7.68/10.24 devices 
>will be supported when available in US (will be this year I understand)
>
>Mike
>
>-----
>
>
>The SMA Sunny Storage looks promising.
>
>It will be able to work with the LGC RESU10 HV battery and, sooner rather
>than later I hope, BYD package as well.
>
>And it will allow for a backup generator tie in.
>
>Ta-dah!
>
>marco
>
>On Thursday, September 13, 2018, Bruce Erickson 
><<http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org>bruce 
>at mendocinosolar.com>
>wrote:
>
> > Hi Marco,
> >
> > I partially agree with you. I recently bid Outback, StorEdge, and Pika
> > options for a GTBB customer, partly to understand pricing for myself, and
> > found OB to be so much more expensive. The customer really wanted a system
> > that would be to be able to charge the batteries off a generator in an
> > outage, understandably. But the extra thousands in cost for OB ended up
> > being prohibitive. Add-on rapid shutdown is a 
> killer. So he’s opting for a
> > nice modern high voltage DC system, with optimizers and built-in RSD, but
> > when there’s an extended outage, he’ll 
> have to hope the sun comes out right
> > after the storm to recharge the batteries, or he’ll end up in the dark
> > again, until the grid comes back. Maybe there’s a high voltage inverter
> > that allows generator charging, or a 
> third-party battery charger, that I’m
> > not aware of. Otherwise high voltage systems are very limited for backup,
> > at least in winter storm scenarios.
> >
> > *Bruce Erickson*
> > Mendocino Solar Service
> > PO Box 1252
> > Mendocino, CA 95460
> > 707-937-1701
> > 707-937-1741 fax
> > 
> <http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org>bruce 
> at mendocinosolar.com
> >
> > *Connecting Mendocino County to Solar Since* *1994*
> >
> >
>
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><blocked::mailto:Tump at swnl.net%22%20%5Co%20%22blocked::mailto:Tump at swnl.net>Tump at swnl.net 
><blocked::http://www.swnl.net/%22%20%5Co%20%22blocked::http://www.swnl.net/>www.SWNL.net
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