<div dir="ltr"><br>Wrenches<br>I have not seen either a OB, Trace or Magnum do a even far job of charge control or voltage limiting for the batteries during AC coupling as this is when the transformer is basicly going backwards, it can and does but even outback says you need to do a AC discounting means or AC or DC load dumping. We have used OB VFX for years as a AC coupled device but always have some way to prevent over charge of the batteries. <br>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Jul 3, 2014 at 12:42 PM, Drake <span dir="ltr"><<a href="mailto:drake.chamberlin@redwoodalliance.org" target="_blank">drake.chamberlin@redwoodalliance.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Larry,<br>
<br>
In this case, the Enphase will AC couple with the Magnum in the protected loads panel. The AC out of the Magnum provides the micro grid to which the Enphase connects. If charging exceeds loads, when the grid is down, power will go to the batteries (up to the high battery voltage set point). If loads are greater than the output of the Enphase system, the Magnum will produce power to feed the loads.<br>
<br>
Thanks,<br>
<br>
Drake<div class="HOEnZb"><div class="h5"><br>
<br>
At 10:55 AM 7/3/2014, you wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi Drake,<br>
<br>
If the Enphase are online, up to 60 amps (30A @ 240V) can be transferred through the Magnum inverter to loads. The inverter is not providing power to loads at that time. If the Enphase go offline, the Magnum takes over using power from the battery. If the load is greater than your Enphase system can provide, the Magnum will transfer to battery power based on the VAC dropout setting. You probably want to use the UPS mode (read ME-ARC manual about this).<br>
<br>
The new Magnum MSH models can combine AC input power and battery power to increase the total AC output capacity for starting heavy loads.<br>
<br>
Larry<br>
<br>
<br>
<br>
On Jul 3, 2014, at 7:59 AM, Drake <<a href="mailto:drake.chamberlin@redwoodalliance.org" target="_blank">drake.chamberlin@<u></u>redwoodalliance.org</a>> wrote:<br>
<br>
This information helps greatly. I really appreciate all of your expert advice.<br>
<br>
One other wild card in the installation is that the inverter is going to be AC coupled with an Enphase system. The Enphase system will contribute greatly to the overall power available in the protected loads panel. But, with Magnum's slow voltage response I'm not sure if the Enphase system will drop off line when the pump surges, or if the Enphase power will be available to help with the startup surge.<br>
<br>
Any insights on this?<br>
<br>
Thank you,<br>
<br>
Drake<br>
______________________________<u></u>_________________<br>
List sponsored by Redwood Alliance<br>
<br>
List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank">RE-wrenches@lists.re-wrenches.<u></u>org</a><br>
<br>
Change listserver email address & settings:<br>
<a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/<u></u>options.cgi/re-wrenches-re-<u></u>wrenches.org</a><br>
<br>
List-Archive: <a href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html" target="_blank">http://www.mail-archive.com/<u></u>re-wrenches@lists.re-wrenches.<u></u>org/maillist.html</a><br>
<br>
List rules & etiquette:<br>
<a href="http://www.re-wrenches.org/etiquette.htm" target="_blank">www.re-wrenches.org/etiquette.<u></u>htm</a><br>
<br>
Check out or update participant bios:<br>
<a href="http://www.members.re-wrenches.org" target="_blank">www.members.re-wrenches.org</a><br>
</blockquote>
<br>
______________________________<u></u>_________________<br>
List sponsored by Redwood Alliance<br>
<br>
List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank">RE-wrenches@lists.re-wrenches.<u></u>org</a><br>
<br>
Change listserver email address & settings:<br>
<a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/<u></u>options.cgi/re-wrenches-re-<u></u>wrenches.org</a><br>
<br>
List-Archive: <a href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html" target="_blank">http://www.mail-archive.com/<u></u>re-wrenches@lists.re-wrenches.<u></u>org/maillist.html</a><br>
<br>
List rules & etiquette:<br>
<a href="http://www.re-wrenches.org/etiquette.htm" target="_blank">www.re-wrenches.org/etiquette.<u></u>htm</a><br>
<br>
Check out or update participant bios:<br>
<a href="http://www.members.re-wrenches.org" target="_blank">www.members.re-wrenches.org</a><br>
<br>
</div></div></blockquote></div><br></div>