When it rains it pours... Just got a call from a competitor's Sunny Boy owner that wants to add Enphase to an existing system.
Anyway, thanks for the tip on the X MPPT80. This higher voltage might make the wire size small enough to run DC back to the existing battery room. I guess the advantage is that this would eliminate the high battery voltage shutdown issue. On the other hand, this would be less efficient as far as grid selling as I understand it. Jason From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Gary Willett Sent: Tuesday, May 03, 2011 10:40 AM To: RE-wrenches Subject: Re: [RE-wrenches] AC Coupling Xantrex XWInverters toEnphaseMicroinverters Jason, etal Another Schneider/Xantrex option to consider. Xantrex will be adding the MPPT 80 to their product line (orderable this month). This new charge controller will allow high voltage strings (600V, as opposed to 150V for current CC). It will also integrate into the existing 4024 inverters via the XAN-Bus for charge control. Regards, Gary Willett, PE Icarus Engineering / Solar Services LLC NABCEP Certified Solar PV Installer # 031310-246 On 5/3/2011 9:15 AM, Jason Szumlanski wrote: Interesting. It's only "off-grid" when the grid goes down, which is presumably not often in this case. I think the actual Enphase position is that this "may void warranty." In practice, I doubt they would a) ask, b) know, and c) actually disallow a warranty claim unless there is system-wide damage that can be directly attributed to the off-grid setup. But to be safe I would advise the customer of this issue and make a case for using the Xantrex GT or another brand that does not make the same exception. Thanks for the info! Jason From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Mark Frye Sent: Tuesday, May 03, 2011 9:32 AM To: 'RE-wrenches' Subject: Re: [RE-wrenches] AC Coupling Xantrex XW Inverters toEnphaseMicroinverters Jason, My guess is that this will work just fine. My comment is that according to my conversations with Enphase, they would consider this an "off-grid" application for which they do not warranty their product. If this is the case, it is something your customer should understand upfront. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com <http://www.berkeleysolar.com/> ________________________________ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jason Szumlanski Sent: Tuesday, May 03, 2011 6:18 AM To: RE-wrenches Subject: [RE-wrenches] AC Coupling Xantrex XW Inverters to EnphaseMicroinverters I read the application note here: http://www.global-download.schneider-electric.com/852577A4005D7372/all/8 FA29D94B918A0FB8525781F0072FCA7/$File/ac-coupling-app-note(976-0240-01-0 1_rev-a).pdf <http://www.global-download.schneider-electric.com/852577A4005D7372/all/ 8FA29D94B918A0FB8525781F0072FCA7/$File/ac-coupling-app-note%28976-0240-0 1-01_rev-a%29.pdf> ...and I contacted Xantrex to make sure the application note applies to other brands of grid-tie inverters. It does according to the rep I spoke with. I just wanted to find out if there is any real world experience out there with Enphase and the XW series AC coupled. I have a customer with three XW4024's in single phase configuration set up as a battery backup only now. He wants to add up to 10kW. I suggested Enphase as an AC coupled system (mainly due to the distance to the proposed array). I'm aware of the pitfalls noted in the application note regarding high limit shutoffs. Any thoughts? Jason Szumlanski Fafco Solar _______________________________________________ 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
