As long as an appropriately sized and rated OCPD is used on the input and/or output circuit of both devices, it shouldn't be a problem.
If it is a problem, it is with the testing certification process, and the standard needs to be fixed, or the testing laboratory needs to re-evaluate their interpretation of the existing standard. See ya! Marv Director of Technology and Support, North America SolarEdge Technologies, Inc. Tech Support North America: +877.360.5292 Mobile: +530.392.0356 From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Darryl Thayer Sent: Tuesday, November 08, 2011 7:22 PM To: RE-wrenches Subject: Re: [RE-wrenches] High Voltage MPPT units Caution!!! if you parallel the imput of both the inverter and terh charge controller one or the other will be destroyed. ASk BoB if you parallel on teh input either charge controllers or inverters one or the other dies. or both. From: "Larry Crutcher, Starlight Solar Power Systems" <la...@starlightsolar.com> To: RE-wrenches <re-wrenches@lists.re-wrenches.org> Sent: Tuesday, November 8, 2011 9:18 AM Subject: Re: [RE-wrenches] High Voltage MPPT units Dick, I had that thought as well but it leaves open the possibility of paralleling the grid inverter and charge controller. What effect that will have is yet to be explored. This idea originated for my personal residence in Yuma which has 4400 watts of PV. We leave that home for several months in the summer but want to protect our frozen foods from power outage after having lost big $$ in ruined food. So I could employ the double disconnect if the AHJ will accept it but I have high reservations in selling that method to others. Larry Crutcher Starlight Solar Power Systems On Nov 8, 2011, at 5:34 AM, Richard L Ratico wrote: > I may be missing something here...... but, for a manual switching solution, > why > not use two standard 600V DC discos. Put the PV to the top of both, load side > of > one goes to the battery inverter, load side of the other to the grid tied > inverter. Turn one off, turn the other one on. Not as elegant as a transfer > switch, maybe more expensive, but seems dirt simple and available now. > > Dick Ratico > Solarwind Electric > > > --- You wrote: > Could you use the old Dankoff trick of running through 2 poles in series of a > 300 v rated switch? That used to be approved, before we had all these 600 v > rated equipment. > > R. Walters > r...@solarray.com<mailto:r...@solarray.com> > Solar Engineer > > > On Nov 7, 2011, at 1:16 PM, Larry Crutcher, Starlight Solar Power Systems > wrote: > >> Ray, >> Yes, the idea was for a low cost way to add battery backup to existing high > voltage PV grid tie systems, not new construction. >> >> The second inverter does not need to be able to sell since that is handled by > the grid tie inverter. It simple passes grid power to loads and maintains the > battery. That means any off-grid inverter/charger or even low cost separate > inverters and chargers may be used, a very economical solution. However, the > idea may be of no value because it appears no one makes a transfer switch. >> >> Larry Crutcher >> Starlight Solar Power Systems _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org<mailto: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<http://www.re-wrenches.org/etiquette.htm> Check out participant bios: www.members.re-wrenches.org<http://www.members.re-wrenches.org> ************************************************************************************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses. ************************************************************************************ CONFIDENTIALITY NOTICE: This e-mail and its attachments are intended only for the use of the individual or entity who is the intended recipient and may contain information that is privileged, confidential and exempt from disclosure or any type of use under applicable law. If the reader of this e-mail is not the intended recipient, or the employee, agent, or representative responsible for delivering the e-mail to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this e-mail is strictly prohibited. If you have received this e-mail in error, please reply immediately to the sender. P Please think of the environment before printing this email ************************************************************************************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses. ************************************************************************************
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