Re: [RE-wrenches] Grid-tie inverter with zero export or non-selling mode

2021-04-11 Thread Dave Angelini Offgrid Solar 


Thanks Corey, 

I probably will use the Skybox without the battery for
the client future. He will have to change out a well pump to a softstart
pump later if he wants batteries. 

BTW Schneider XWP and CSW can run
without the transformers in a zero export mode. They run an amp on the
primary to always keep from selling. XWP can also have the power meter if
one wants to really drop the very small loss. But, you do have a battery,
which is why I will probably use the Skybox. He also is an old friend. 

I
may have a consult for you if my client makes his decision on Eleuthera
Bahamas or Jamaica. He wants palm trees  

Dave Angelini Offgrid
Solar
"we go where powerlines don't"
http://members.sti.net/offgridsolar/
[1]
e-mail offgridso...@sti.net [2]
text 209 813 0060

On Sun, 11 Apr 2021
12:20:39 -0500, Corey Shalanski  wrote:   Hello Dave,   As far as I know,
setting up an inverter for zero export will *always* require installation
of current transformers (CTs), and those CTs must be connected to some sort
of power meter, which in turn must be connected to some sort of control
device. Whether the power meter and/or control device are built-in or
external varies by manufacturer. See attached diagrams for several examples
by popular manufacturers:  

* Sol-Ark: both power meter and control
device appear* to be built-in 

* * I have never actually worked with
Sol-Ark equipment, so someone please correct if this is not the case.

*
SolarEdge: control device is built-in, power meter is external
* SMA:
both power meter and control device are external

  You'll note the
presence of CTs in each diagram. Both SMA [3] and SolarEdge [4] offer 6 kW
inverters; Sol-Ark [5] appears to only offer only 8 kW and 12 kW options.  
-- Corey Shalanski Jah Light Solar Portland, Jamaica   
  On Sat, Apr 10,
2021 at 8:41 AM  wrote:  

Hi Wrenches, 

I do not see much grid-tie and
never with a battery less inverter. I have a client who wants me to explore
zero export for them. I have looked at http://www.elgrispower.com/ [7] 

Is
there such a thing in a medium size 6 KW Grid inverter built-in that can
zero export? Or, Do I have to externally wire power meters ect? 


Thank-you !  

Dave Angelini Offgrid Solar
"we go where powerlines
don't"
http://members.sti.net/offgridsolar/ [8]
e-mail offgridso...@sti.net
[9]
text 209 813 0060
 

Links:
--
[1]
http://members.sti.net/offgridsolar/
[2] mailto:offgridso...@sti.net
[3]
https://files.sma.de/downloads/SBxx-US-DS-en-38.pdf?_ga=2.179034083.671752729.1618086517-1642740404.1587256948
[4]
https://www.solaredge.com/sites/default/files/se-hd-wave-single-phase-inverter-with-setapp-datasheet-na.pdf
[5]
https://www.sol-ark.com/support/
[6] mailto:offgridso...@sti.net
[7]
http://www.elgrispower.com/
[8] http://members.sti.net/offgridsolar/
[9]
mailto:offgridso...@sti.net
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

There are two list archives for searching. When one doesn't work, try the other:
https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
http://www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
http://www.members.re-wrenches.org

Re: [RE-wrenches] Monitoring large PV systems

2021-04-11 Thread Chris Mason 
I've used Solar-Log for larger systems, they work with a number of inverter
systems.

On Sat, Apr 10, 2021 at 4:38 PM William Miller 
wrote:

> Friends:
>
>
>
> We are starting to work on larger grid-tied systems (500kW) and I am
> trying to school myself on some of the aspects.  Monitoring is the subject
> at hand.
>
>
>
> One such system uses AlsoEnergy hardware on the PowerTrack online
> platform.  There is also a VistaWatt service that is involved that looks
> like it is simply an analytics service.
>
>
>
> Have I correctly categorized the above entities?  Does anyone have
> experience with any of the above that might offer some insight as to the
> pros and cons of these services?  Anyone have any documentation on the
> hardware?
>
>
>
> Thanks in advance!
>
>
>
> William Miller
>
>
>
> Miller Solar
>
> 17395 Oak Road, Atascadero, CA 93422
>
> 805-438-5600
>
> www.millersolar.com
>
> CA Lic. 773985
>
>
>
>
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> There are two list archives for searching. When one doesn't work, try the
> other:
> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
> List rules & etiquette:
> http://www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> http://www.members.re-wrenches.org
>
>

-- 
Chris Mason
Solar systems designer
Generac Generators Industrial technician

Comet Systems Ltd DBA Comet Solar
Anguilla Cell  264.235.5670
WhatsApp 264.235.5670
Skype: netconcepts
www.cometsolar.com 
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

There are two list archives for searching. When one doesn't work, try the other:
https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
http://www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
http://www.members.re-wrenches.org