Single vs Distributed Inverters? [RE-wrenches]

[Darryl Thayer]

If the system needs a back up energy source I am sure
happy with the 40 kW Outback system driving 3 phase
(120-208 star)that I installed.  The advantage is only
a few inverters run if the sun is weak, from one to 12
inverters GVFX 3648.  And 13ea MX60s.  The cost of the
Outback inverter charge controller system was less
than the single inverters I priced.    
Darryl

--- "Jeffery Wolfe, Global Resource Options"
<jeff at globalresourceoptions.com> wrote:

> 
> David,
> 
> It's your first large system. You know string
> inverters. The engineering
> on a large system can be very similar to a small
> system if you use the
> string inverters. Less to learn on a commercial job
> that way. And
> probably less expensive, depending upon exact
> stringing.
> 
> Go with a large inverter, then you get to learn a
> new product line for
> engineering, special order some equipment, wait for
> it, learn how to
> install, commission, and possibly troubleshoot it.
> 
> I'd stick with the string inverters unless you're
> planning on doing a
> lot of these, and then you could try to optimize.
> But we've found that
> the string inverters are less expensive, installed
> (if you've got
> space), than any larger inverter, up to 50 or 60 kW
> of capacity.
> 
> Depending upon module, you can probably use 6 SMA
> 6000's, with about 7
> kW on each. It is even balanced on the phases!
> 
> Jeff
> Jeff Wolfe
> Global Resource Options, Inc., Solar Energy
> Solutions
> 
> Original Message:
> -----------------
> From: David Blecker blecker at seventhgenergy.org
> Subject: Single vs Distributed Inverters?
> [RE-wrenches]
> 
> Wrenches,
> 
> We're trying to design our first large PV system -
> 40kW grid-tied,
> roof-mount, 208V grid - and we're wrestling with the
> inverter selection.
> I've seen traffic on this list with seemingly split
> opinions as to go
> with a single large inverter or to use multiple
> parallel smaller
> inverters.  So, anyone care to re-open that thread
> and share your
> opinions and experiences?
> 
> Thanks in advance.  Hope to see all you at the
> Energy Fair!
> www.the-mrea.org
> 
> -David
> 
> 
> 
> ----------
> David Blecker, PE
> Seventh Generation Energy Systems, Inc.
> Ph:  608-467-1518
> Cell: 608-335-3375
> Fax: 866-762-7496 (toll-free)
> Web: www.seventhGenergy.org
> 
> 
> - - - -
> To send a message: RE-wrenches at topica.com
> 
> Archive of previous messages:
> http://lists.topica.com/lists/RE-wrenches/read
> 
> List rules & how to change your email address:
> www.mrsharkey.com/wrenches/etiquette.php
> 
> Check out participant bios:
> www.mrsharkey.com/wrenches/
> 
> Hosted by Home Power magazine
> 
> Moderator: michael.welch at homepower.com
>
> 
> 


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 


- - - -
To send a message: RE-wrenches at topica.com

Archive of previous messages: http://lists.topica.com/lists/RE-wrenches/read

List rules & how to change your email address: www.mrsharkey.com/wrenches/etiquette.php

Check out participant bios: www.mrsharkey.com/wrenches/

Hosted by Home Power magazine

Moderator: michael.welch at homepower.com
--^----------------------------------------------------------------
This email was sent to: michael.welch at homepower.com

EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9.bWljaGFl
Or send an email to: RE-wrenches-unsubscribe at topica.com

For Topica's complete suite of email marketing solutions visit:
http://www.topica.com/?p=TEXFOOTER
--^----------------------------------------------------------------