[RE-wrenches] wrenches] Husqvarna 5500 and VFX3524Compatibility question
boB
boB at midnitesolar.com
Sat Feb 2 18:56:32 PST 2013
Carl, NZ is 240 VAC right ? 240 VAC 2 wire ?
I think that the problem may have to do with leg to leg voltage cross
regulation
imbalance in 120/240 3 wire systems.
boB
On 2/2/2013 3:23 PM, Carl Emerson wrote:
>
> Goodness knows why 240V Sunny Island's are unavailable in the US...
>
> We have been installing these in NZ for years !!!
>
> Regards
> Carl Emerson
>
> On 2/1/2013 7:42 AM, John Berdner wrote:
>
>> John:
>>
>> If doing an AC coupled system with SB/SI there a couple things to
>> consider.
>>
>> 1)SI is 120 Vac only and SB and grid are both 240. You can get 2 SI's
>> but that is pricey. SMA now makes an autoformer (finally) but it is
>> really big and pretty expensive (hey Robin/Bob there is an
>> opportunity here). Too bad they don't make a 240 Vac SI and no
>> longer make the old 1800 which had a 120 Vac output.
>>
>
>
> Already doing that, John, as part off our SMA/SI/SB and battery based
> integration package just starting to ship now.
>
> Thanks !!
> boB
>
>
>
> A couple of ways to wire this (ASCII Draw, >> indicate power flow, <>
> indicates bidirectional):
>
> PV >> SB >> Protected Load Center <> Auto former <> SI <> Xfer switch
> <>Grid.
>
> | |
>
> | >> Loads | <<< Generator
>
> Or alternatively like this:
>
> PV >> SB >> Protected Load Center <> Xfer switch <>Auto former <> SI
> << Generator
>
> | |
>
> | >> Loads | <> Grid
>
> A couple of tradeoffs here:
>
> In case 1 the downside is that the output of the SI is 120 Vac to the
> grid = imbalance. All your grid tied PV flows through the auto-former
> with the associated losses. The upside is that your protected loads
> are protected by the SI which has a very fast (transparent) transfer.
>
> In case 2 the downside is that the loads are not protected so you will
> see an interruption when the xfer switch transfers. With a manual
> xfer switch this interruption could be a long time J The upside is
> the PV is connected directly to the grid @ 240Vac normally with no
> autoformer losses
>
> If the SI is already installed you probably are doing something like
> this already.
>
> To connect in a generator you have to understand the SI's grid input
> programming. The SI has only one physical grid "input". I say "input"
> because both side of an SI are bi-directional and can be either and
> input or an output depending on power flow. If you go with Case 1 The
> problem is that you need to set the current limit high enough for the
> SB so it can grid feed. If your SB is larger than your generator you
> can overload the generator when in backup mode. You also need to
> allow power flow out of the grid input which you don't want with a
> small generator. It is also nice to have wider voltage and frequency
> limits when operating with the generator. Fortunately there are 2
> logical inputs for the single grid input and a digital generator mode
> selector input (signal level) that is used to switch between the two.
> Each of these logical inputs can have different parameters, i.e. one
> for grid and one for generator. You provide a feedback a signal to
> the digital input mode selector to tell the SI which set of parameters
> to use.
>
> There are several ways to do the mode selection ranging from a switch
> (light switch or toggle switch) near the SI to select modes to an aux
> contact on a full auto xfer relay.
>
> For a low case bulletproof approach use a 3 phase manual xfer switch
> and use the unused third power pole to do your digital input mode
> switching. This is what I have at my house. The grid feeds one side
> of the manual Xfer switch and I have an SO cord on the other side to
> plug in to a generator for charging during a prolonged outage.
>
> Feel free to contact me either online or offline if you have questions.
>
> Best Regards,
>
> John Berdner
>
> General Manager, North America
>
> SmallBannerPictEngnew
>
> SolarEdge Technologies, Inc.
>
> 3347 Gateway Boulevard, Fremont CA 94538 USA */(*Please note of our
> new address.)/*
> T: 510.498.3200, X 747
>
> M: 530.277.4894
>
> *From:*re-wrenches-bounces at lists.re-wrenches.org
> <mailto:re-wrenches-bounces at lists.re-wrenches.org>
> [mailto:re-wrenches-bounces at lists.re-wrenches.org] *On Behalf Of *john
> *Sent:* Friday, February 01, 2013 4:12 AM
> *To:* re-wrenches at lists.re-wrenches.org
> <mailto:re-wrenches at lists.re-wrenches.org>
> *Subject:* Re: [RE-wrenches] wrenches] Husqvarna 5500 and VFX3524
> Compatibility question
>
> John,
>
> Thanks for that bit of information. I have a customer with a
> SB5000 and recently added a Sunny Island with 8 L16 batteries. This
> answers their question as to what they will do in an extended outage
> with no sun. I wanted to suggest a small backup generator but wasn't
> sure how it would work. Now I can install the cord and set the sunny
> island for a Honda 2000i, several of which I keep on hand for
> emergency power for us and our customers.
>
> John Blittersdorf
>
> /NABCEP Certified Solar PV Installer ^tm /
>
> *Central Vermont Solar & Wind LLC*
>
> 104 River Street
>
> Rutland, VT 05701
>
> 802-770-8625 Cell
>
> 802-747-0577 Office
>
> 802-773-0924 Fax
>
> Mark your calendar: SolarFest 2013, July 12, 13 & 14
> www.SolarFest.org <http://www.solarfest.org/>
>
>
> -----Original Message-----
> From: John Berdner <John.Berdner at solaredge.com
> <mailto:John.Berdner at solaredge.com>>
> To: Allan <Allan at positiveenergysolar.com
> <mailto:Allan at positiveenergysolar.com>>; RE-wrenches
> <re-wrenches at lists.re-wrenches.org
> <mailto:re-wrenches at lists.re-wrenches.org>>
> Sent: Thu, Jan 31, 2013 8:20 pm
> Subject: Re: [RE-wrenches] Husqvarna 5500 and VFX3524 Compatibility
> question
>
> SMA Sunny Island also does this but also discharges battery in
> parallel with the generator to create a "virtual generator" that is
> larger than the actual generator.
>
> Just set the max generator current and it does the rest.
>
> Best Regards,
>
> John Berdner
>
> General Manager, North America
>
> SmallBannerPictEngnew
>
> SolarEdge Technologies, Inc.
>
> 3347 Gateway Boulevard, Fremont CA 94538 USA */(*Please note of our
> new address.)/*
> T: 510.498.3200, X 747
>
> M: 530.277.4894
>
> *From:*re-wrenches-bounces at lists.re-wrenches.org
> <mailto:re-wrenches-bounces at lists.re-wrenches.org>
> [mailto:re-wrenches-bounces at lists.re-wrenches.org
> <mailto:re-wrenches-bounces at lists.re-wrenches.org?>] *On Behalf Of
> *Allan Sindelar
> *Sent:* Thursday, January 31, 2013 2:14 PM
> *To:* William Miller
> *Cc:* RE-wrenches
> *Subject:* Re: [RE-wrenches] Husqvarna 5500 and VFX3524 Compatibility
> question
>
> William,
> Yes, that's my understanding. Outback acknowledged this to me years ago.
> Allan
>
> *Allan Sindelar*
> Allan at positiveenergysolar.com <mailto:Allan at positiveenergysolar.com>
> NABCEP Certified Photovoltaic Installer
> NABCEP Certified Technical Sales Professional
> New Mexico EE98J Journeyman Electrician
> Founder and Chief Technology Officer
> *Positive Energy, Inc.*
> 3209 Richards Lane (note new address)
> Santa Fe, New Mexico 87507
> *505 424-1112*
> www.positiveenergysolar.com <http://www.positiveenergysolar.com/>
>
> On 1/29/2013 9:28 PM, William Miller wrote:
>
> Allan:
>
> Could it be that the SW systems are protecting the generator with
> Generator Support, and the Outback inverters are not?
>
> William Miller
>
>
>
> At 07:18 PM 1/29/2013, you wrote:
>
> This is going back several years...
>
> The Outback VFX series lacks the tight input current regulation of
> the SW series, so the max AC amps in is really just a suggestion.
> In many cases (and especially with these small generators) we want
> to set the max amps in as high as possible to minimize charging
> time and maximize C/rate. Yet a surge load can momentarily exceed
> the max amps setting.
>
> I have observed that the Honda inverter/generators have a quite
> sensitive AC output breaker, that will sometimes trip if a surge
> load (such as a refrigerator) comes on during a charge cycle set
> close to the generator's capacity. This incident was specific to a
> Honda 3000i. In contrast, Yamaha's EF3000iSE will lug when
> overloaded - not good for the generator, but also not likely to
> trip the output breaker.
>
> This is a different issue than was being discussed, but fits your
> question.
> Allan
>
>
>
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