Also Robin at Midnight Solar has been promising to come out with a higher VOC charge controller too. How about it Robin? I'll be needed one for this spring for use at our Design and Training Center for use in a class. Be happy to do some Beta testing for you.
Chris Schaefer Solar and Wind FX Inc. 5115 South Hill Road Canandaigua(Bristol Center) New York 14424 585.229.2083 Cell 748.1870 ch...@solarandwindfx.com http://www.solarandwindfx.com/ Where Knowledge Equals Power Independence ***CONFIDENTIALITY NOTICE*** The information in this email may be confidential and/or privileged. This email is intended to be reviewed by only the individual or organization named above. If you are not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any review, dissemination or copying of this email and its attachments, if any, or the information contained herein is prohibited. If you have received this email in error, please immediately notify the sender by return email and delete this message from your system. -----Original Message----- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of penobscotso...@midmaine.com Sent: 19 January, 2009 06:18 To: jry...@netscape.com; RE-wrenches Subject: Re: [RE-wrenches] Back feeding battery inverter with grid-tie inverter Hi Jeff, This isn't an answer to the questions below, but an alternate suggestion. Apollo Solar has a charge controller which allows for strings of up to 200 VOC (160 volts nominal) and I believe 100 amps. Would this not be a simpler, more efficient system? Just a thought... Daryl DeJoy NABCEP Certified PV installer Penobscot Solar Design > I know this subject has come up before, but there have been several > different suggested ways to handle the problem and I was hoping for > easiest. We install lots of both on grid and off grid systems. However, > we have a client that will require a ground mounted array much futher away > from the inverter and batteries in the garage than we normally would want > to do since the voltage drop for this long distance would be excessive at > low voltage even with large cables. We have decided to locate a > weather-proof sunnyboy grid-tie inverter at the array, and supply 120/240 > volts to the critical loads sub-panel which is supplied by a Xanrex XW > inverter and battery bank in the garage. I realize there are several > design issues here when the grid is down, since we want the grid-tie > inverter to remain on but be blocked from the grid by the Xantrex > inverter. > > The question is, what is the best way to keep a load on the sunnyboy since > it will not be grid connected during an outage. Also, is there a best way > to feed the output from the Sunnyboy to the Xantrex that does not just > power the sub-panel loads during an outage, but also will re-charge the > battery bank through the Xanrex? > > If you back-feed the Xanrex from the sub-panel it is normally supplying > with output from the Sunnyboy, will the Xanrex see this input and think > the grid is up and be able to re-charge the battery bank? > > Will we need any separate transfer switches or power relays? > > Thanks, > > Jeff Yago > > _____________________________________________________________ > Netscape. Just the Net You Need. > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@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@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 No virus found in this incoming message. Checked by AVG. Version: 7.5.524 / Virus Database: 270.10.7/1893 - Release Date: 14-Jan-09 06:59 No virus found in this outgoing message. Checked by AVG. Version: 7.5.524 / Virus Database: 270.10.7/1893 - Release Date: 14-Jan-09 06:59 _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@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
