[RE-wrenches] SolarEdge AC coupled off-grid (part 2)

[Ray]

I've AC coupled off grid with the Sunny Island, but I haven't tried it 
with Solar Edge.  Can you adjust the Solar Edge coupling window to 
outside the IEEE set points?  We used to have set all GT inverters in 
Hawaii wider, because the utility wanted them to stay on longer in a 
brown out.

Ray Walters
Remote Solar
303 505-8760

On 7/25/19 5:55 AM, Howie Michaelson wrote:
> Hi Ray,
> I get the issues with AC coupling.  However, this system already has a 
> 3+ kW DC coupled array, the new array is close to 200' away, and it 
> would take 2 more charge controllers of any of high voltage ones for 
> this size array.
> Are there any battery based inverters that folks have had decent luck 
> with AC coupling in an off-grid environment?  (My preference would be 
> the XW+).
> Thanks,
> Howie
>
> On Thu, Jul 25, 2019 at 1:43 AM Ray <ray at solarray.com 
> <mailto:ray at solarray.com>> wrote:
>
>     I do not recommend AC coupling for off grid, except to offset
>     daytime loads or to add PV at remote buildings. Besides coupling
>     errors like you're experiencing, the entire system will shut down
>     and not recharge, if the VFX inverters shut down.   With a DC
>     coupled array, the batteries can recharge, even if the inverters
>     have shut down for low voltage, over load, etc.  At least when
>     someone comes to reset it, the battery won't be dead too. The 3rd
>     reason, as you've found, SE and other GT manus, don't want to deal
>     with off grid.
>
>     There are higher voltage, higher capacity Charge controllers
>     available now, like the FM100, and Magnum PT 100 that could almost
>     handle that array with one controller.  The PT 100 will work with
>     Midnite's SOB rapid disconnect system.
>
>
>     Ray Walters
>     Remote Solar
>     303 505-8760
>
>     On 7/24/19 11:03 PM, Howie Michaelson wrote:
>>     sorry, prematurely emailed previous post:
>>
>>     I'm wondering if the VFXs are just not capable of putting out
>>     clean enough power in order to hold the SE HD inverter. I had it
>>     operating on this same system for a couple of hours with not this
>>     problem.  Is it likely that this inverter combo is not going to
>>     work consistently?  Will it make sense to use a different battery
>>     inverter (XW+6848 or Radian)? What has folks experience been in
>>     similar off-grid AC coupled SE systems?
>>     As always, thanks in advance for any thoughts.
>>
>>     Best,
>>     Howie
>>
>>     _______________________________________________
>>     List sponsored by Redwood Alliance
>>
>>     List Address:RE-wrenches at lists.re-wrenches.org  <mailto:RE-wrenches at lists.re-wrenches.org>
>>
>>     Change listserver email address & settings:
>>     http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>>     List-Archive:http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>>
>>     List rules & etiquette:
>>     www.re-wrenches.org/etiquette.htm  <http://www.re-wrenches.org/etiquette.htm>
>>
>>     Check out or update participant bios:
>>     www.members.re-wrenches.org  <http://www.members.re-wrenches.org>
>>
>     _______________________________________________
>     List sponsored by Redwood Alliance
>
>     List Address: RE-wrenches at lists.re-wrenches.org
>     <mailto:RE-wrenches at lists.re-wrenches.org>
>
>     Change listserver email address & settings:
>     http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
>     List-Archive:
>     http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
>     List rules & etiquette:
>     www.re-wrenches.org/etiquette.htm
>     <http://www.re-wrenches.org/etiquette.htm>
>
>     Check out or update participant bios:
>     www.members.re-wrenches.org <http://www.members.re-wrenches.org>
>
>
> _______________________________________________
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches_lists.re-wrenches.org/attachments/20190725/a35b8b05/attachment.htm>