<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Dana,<div><br></div><div>So is the issue that any 120v 60 hz units are all the US versions, or do they have 120v 60 hz international versions ( probably non UL)?</div><div><br></div><div>My asking is that I've got some large projects in Baja that could use full feature and larger stacking than the US version.</div><div><br></div><div>thanks,</div><div><br></div><div>jay</div><div><br></div><div>peltz power<br><div><div>On Nov 26, 2008, at 1:32 PM, Dana Brandt wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">Thanks for the report, Steve. I'm also a huge fan of the European SI. We need to be careful when we start to compare operations across the ocean. The US version of the SI is a bit different from the European version. SMA in Germany decided that the full-featured SI would be too expensive for the US market, so they sent us a stripped down, cheaper version. The US version still has some nice features, but it has some limitations when compared to the full-featured European version. One of the brilliant aspects of the full-featured SI is the multi-master operation. I wrote a little bit on the SI for AC minigrids and the multi-master operation in HP 109 - Oct/Nov 2005. It's frustrating to me that SMA hasn't UL listed a full-featured SI for us in the States, but they must figure it doesn't make financial sense for them.<br> <br>Dana<br><br>-- <br>Dana Brandt<br>Ecotech Energy Systems, LLC<br><a href="http://www.ecotechenergy.com">www.ecotechenergy.com</a><br><a href="mailto:dana@ecotechenergy.com">dana@ecotechenergy.com</a><br>360.510.0433<br> <br><br><div class="gmail_quote">On Wed, Nov 26, 2008 at 10:20 AM, <span dir="ltr"><<a href="mailto:Steve@windandsun.co.uk">Steve@windandsun.co.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi Tump,<br> <br> Yes, the SI & SB system is all it's cracked up to be!<br> <br> I'm not sure what is possible in the US but we've been running a 60kW<br> Sunny Island system for over a year now which powers the Scottish<br> Isle of Eigg and uses PV's with Sunny Boys, wind turbines with Windy<br> Boys, 100kW hydro turbine & back-up diesel generation. Power is<br> distributed around the island at 3.3kV three-phase using step-up &<br> step-down transformers. The generation is located at various parts of<br> the island (as are the houses & loads) with the Sunny Islands/Battery<br> Store & back-up diesels roughly in the middle.<br> <br> See our website for a full description:<br> <a href="http://www.windandsun.co.uk/projects_eigg.htm" target="_blank">http://www.windandsun.co.uk/projects_eigg.htm</a><br> <br> The Sunny Island inverters use 'Frequency Shift Power Control' -<br> variations in island grid frequency to communicate control signals to<br> the generation sources and to bonus loads. If the batteries cannot<br> absorb the renewable power being generated onto the network (if they<br> are full, or the power generated exceeds the inverter/charger<br> capacity), the Sunny Island inverters raise the system frequency.<br> Sunny Boy & Windy Boy inverters are set to 'Off-Grid' mode to respond<br> to this frequency rise and back off power being fed into the system.<br> Other renewable generation (eg. hydro turbines) that is able to<br> respond to this frequency rise to restrict their power output can<br> also be incorporated in the system.<br> <br> The raised frequency can also be used to trigger switching on of<br> bonus loads when there is surplus renewable energy output.<br> <br> The great thing about using this frequency shift for control is that<br> no communication cabling, special circuits or dedicated switching is<br> required and distance is no problem.<br> <br> The other great thing about using the Sunny Island system is that it<br> allows use of the Sunny Webbox for remote monitoring. This means<br> every morning I can check on the internet to see how the system is<br> performing, view state of charge of batteries, and dial in to change<br> things if needed. Furthermore, several people can do this at once -<br> eg. system owners & SMA technical support - so we can all look at<br> what's been happening and discuss any events. (I'm sure you all know<br> how useful this can be!)<br> <br> As an example the attached Word document shows how the frequency<br> shift works in practice (Hope it's Ok to send attachments on this<br> list)<br> <br> Regards<br> Steve Wade<br> <br> <br> <br> From: "Tump" <<a href="mailto:tump@hughes.net">tump@hughes.net</a>><br> To: "'RE-wrenches'" <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br> Date sent: Wed, 26 Nov 2008 08:33:38 -0500 Subject: Re:<br> [RE-wrenches] More on AC coupling Send reply to: RE-wrenches<br> <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br> <mailto:<a href="mailto:re-wrenches-request@lists.re-">re-wrenches-request@lists.re-</a><br> <a href="http://wrenches.org?subject=unsubscribe" target="_blank">wrenches.org?subject=unsubscribe</a><br> ><br> <mailto:<a href="mailto:re-wrenches-request@lists.re-wrenches.org">re-wrenches-request@lists.re-wrenches.org</a>?subject=subscribe><br> <div class="Ih2E3d"><br> > Matt, I have long been interested in installing the SMA SI & SBs but<br> > I have a VERY tough time selling $9ks worth of inverters, just to<br> > get things started. In the system below I would not of hesitated in<br> > installing the SMA SI & SB! I too agree that w/this type of scenario<br> > described below, I would have given quite a bit of thought to using<br> > the SMAs. Can't beat the battery charging, no charge controllers &<br> > expandability.<br> > Please if there is someone out there that has had experience w/ the<br> > SMA SI<br> > & SB let us know if it is all that it is cracked up to be!<br> > With passport in hand, I offer my help if someone out there has a<br> > large system like this, that will be using the SI & SB/WB type of<br> > set up. TUMP<br> ><br> <br> </div>Wind & Sun Ltd., Humber Marsh, Stoke Prior,<br> Leominster, Herefordshire, HR6 0NR.<br> Web: <a href="http://www.windandsun.co.uk" target="_blank">www.windandsun.co.uk</a><br> <br> Tel: 01568 -760671<br> Fax: 01568-760484<br> <br> The latest edition of the Wind & Sun Design Guide & Catalogue is now<br> available.<br> This has 112 pages detailing our product range and is packed with<br> information<br> and advice about setting up or using a wind or solar electrical<br> system.<br> Price is £5.00 + £1.00 p&p.<br> <br> Wind & Sun Ltd<br> Registered in England & Wales, Company Number 3403803<br> VAT Number GB 448 5458 14,<br> Registered Office: Humber Marsh, Stoke Prior, Leominster,<br> Herefordshire, HR6 0NR<br> <br> <br>_______________________________________________<br> List sponsored by Home Power magazine<br> <br> List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br> <br> Options & settings:<br> <a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br> <br> List-Archive: <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br> <br> List rules & etiquette:<br> <a href="http://www.re-wrenches.org/etiquette.htm" target="_blank">www.re-wrenches.org/etiquette.htm</a><br> <br> Check out participant bios:<br> <a href="http://www.members.re-wrenches.org" target="_blank">www.members.re-wrenches.org</a><br> <br> <br></blockquote></div><br><br clear="all"><br> _______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Options & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org<br><br>List rules & etiquette:<br>www.re-wrenches.org/etiquette.htm<br><br>Check out participant bios:<br>www.members.re-wrenches.org<br><br></blockquote></div><br></div></body></html>