[RE-wrenches] AC Coupling Xantrex XW Inverters toEnphaseMicroinverters

[Gary Willett]

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-bounces at lists.re-wrenches.org 
> [mailto:re-wrenches-bounces at 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-bounces at lists.re-wrenches.org 
> [mailto:re-wrenches-bounces at 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/8FA29D94B918A0FB8525781F0072FCA7/$File/ac-coupling-app-note(976-0240-01-01_rev-a).pdf 
> <http://www.global-download.schneider-electric.com/852577A4005D7372/all/8FA29D94B918A0FB8525781F0072FCA7/$File/ac-coupling-app-note%28976-0240-01-01_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
>
>
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