[RE-wrenches] Battery based grid tie question.

[robert ellison]

The SW's are real early in the process and we doubt the 65% or so efficiency
makes sense especially with the battery losses in the process. The other
dealer told me the GTI's  were not available anyway, but I haven't checked.
He was looking for the interface relay when I came into this process.
When I get down there I will check the date. it is 3 hours from here.

Thanks,
Bob

On Wed, Mar 25, 2009 at 7:56 PM, Tump <tump at hughes.net> wrote:

>  What year are the SWs? they have had grid inter tie for years, if the
> inverters were manufactured prior to I think 2001 then you do not need to
> have the gti box installed.  If the guys on a budget why spend  the extra
> $$$$? Its not the most efficient it certainly cheaper.
>
>  -----Original Message-----
> *From:* re-wrenches-bounces at lists.re-wrenches.org [mailto:
> re-wrenches-bounces at lists.re-wrenches.org] *On Behalf Of *robert ellison
> *Sent:* Wednesday, March 25, 2009 9:39 AM
> *To:* RE-wrenches
> *Subject:* [RE-wrenches] Battery based grid tie question.
>
> On a similar question to what works well together. I am rebuilding the wind
> side of an old off grid system that the new owner has brought the grid in.
> He wants to grid tie the system. Another dealer is doing the solar side of
> things.
> My thoughts are the 48 volt SW inverters need to go, and replace them with
> Outback 48 volt grid tie units and have the wind keep the battery up. Am I
> correct that when the batteries are full from what ever source the outbacks
> will grid connect and net meter any excess power to the grid? Seems that I
> remember that they will but almost never get a call for grid tie up here in
> the sticks so I figured I would ask the knowledge base.
>
> I would suggest he keep the SW inverters to generator charge in case of a
> long power outage as last I knew the Outbacks (FX) did not care for
> generator power.
>
> I could probably research it but the list is faster and probably more
> accurate that reading all the manuals with all my free time these days!
>
> Needless to say the fellow in on a budrgt and the power company brought the
> power into the main building not the power house. Can't make things
> easy......
>
> Thanks,
> Bob
>
> 2009/3/23 <I2P at aol.com>
>
>>  Wrenches,
>>
>> I have been doing some experimenting --testing compatibility between
>> brands of grid tie inverters and sign wave battery type inverters. I am
>> hoping some of you also have  some experience here and we can compare
>> results.
>>
>> My interest is fueled by my belief that AC coupling is the ideal way to
>> increase system capacity  for battery based off grid systems. The primary
>> benefit is higher system efficiency for AC loads used during the day. I
>> realize that power management becomes important but my interest right now is
>> just to find out who talks to who. My ultimate "power management" tool will
>> be an electric vehicle. Charging it will undoubtedly suck up available
>> juice.
>>
>> So far:
>>
>> SMA synchronizes to Xantrex SW (have not tested the XW yet) and Outback
>> and of course the SMA Sunny Island
>>
>> Xantrex GT also syncs to the SW
>>
>> I started this project with Enphase as my first choice since their system
>> is so scaleable. I have been unable to make Enphase sync. Marv at Enphase
>> has been very helpful but to date no results.  I have, at Marv's suggestion
>> ,used capacitors to clean the somewhat hashy SW output without results. Marv
>> tells me he is testing Enphase and Outback. Does anyone have experience
>> syncing Enphase to other offgrid inverters?
>>
>> Any experiences with Fronius and others.?
>>
>> Though the SW output is not the cleanest, the results with SB and GT are
>> very stable. They hookup early AM and its steady green light all day long.
>> Though I use microwave, start induction motors etc, and my scope clearly
>> shows lots of spikes during these events, the GT and SB hang in.
>>
>> What are the experiences from others regarding mix and match?.
>> Interoperability among brands seems to be a very desirable goal to this
>> wrench.
>>
>> Don Loweburg
>> Offline Solar, Inc
>>
>> ------------------------------
>> *A Good Credit Score is 700 or Above. See yours in just 2 easy steps!<http://pr.atwola.com/promoclk/100126575x1219858252x1201366219/aol?redir=http:%2F%2Fwww.freecreditreport.com%2Fpm%2Fdefault.aspx%3Fsc%3D668072%26hmpgID%3D62%26bcd%3DMarchfooterNO62>
>> *
>>
>> _______________________________________________
>> List sponsored by Home Power magazine
>>
>> List Address: RE-wrenches at lists.re-wrenches.org
>>
>> Options & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive:
>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out participant bios:
>> www.members.re-wrenches.org
>>
>>
>>
>
> _______________________________________________
> List sponsored by Home Power magazine
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Options & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out participant bios:
> www.members.re-wrenches.org
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20090326/c1bcb47a/attachment-0004.html>