Thanks Jay,
I talked again with Magnum.
I have the latest Rev 6.1 MS-PAE 4448 so the exact implementation has
changed from that described in AN002, 5/10. The current Rev. has changes
designed to improve interaction with the GT inverters. I didn't really
get to the bottom of that. But the critical aspect of this remains
unchanged:
- the Magnum will have shifted the frequency <down now> by 0.5 Hz
<sufficient to knock the GT inverters off-line> when the DC voltage
rises to Absorb + 4V.
This makes more sense than the 6V I had in my notes (which may have
meant 6V above Float.)
With all this in mind, I think I will plan on using this feature as a
backup to an AC dump load controller set to maintain Float voltage.
On 6/12/2020 7:12 AM, Jay wrote:
Hi Mark
I found this which might be of help.
https://www.magnum-dimensions.com/sites/default/files/MagArchive/AN-0002-AC-Coupling-Rev-5-10.pdf
Jay
Peltz power.
On Jun 12, 2020, at 6:59 AM, Mark Frye <ma...@berkeleysolar.com> wrote:
Looking for confirmation from Wrenches who know Magnum inverters:
- MS-PAE
-ME-RC
- Frequency shift enabled (battery type "Custom")
- AC coupled PV inverters w/o frequency shift capability
Function:
At Absorb voltage frequency shift is zero, at Absorb voltage + 6 V,
shift is 0.5 Hz <grid ties pushed off-line> (in 0.3 volt increments)
This is from my notes from a tech support call, but I am wondering if
I have it mixed up. Protecting at 6 volts above the Absorb seems a
bit high.
Thanks,
Mark
_______________________________________________
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
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
_______________________________________________
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
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
_______________________________________________
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
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
