[RE-wrenches] Battery based grid tie question.

[robert ellison]

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
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20090325/25d38f1a/attachment-0002.html>