Yes Drake, I stand corrected, I was picturing the micro inverters feeding the input rather than coupling the output of the Magnum. To your original question, I think you would have to be consuming more power than the PV array alone can provide before the Magnum voltage would drop with the pump load. So it may be a rare event unless the PV array is small. Of course after sundown its all on the Magnum. That’s why I suggested two Magnums in my first response. Does anyone know how tolerant the Enphase inverters are of such a momentary sag?
Larry On Jul 3, 2014, at 1:42 PM, Drake <[email protected]> wrote: Hi Larry, 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. Thanks, Drake At 10:55 AM 7/3/2014, you wrote: > Hi Drake, > > 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). > > The new Magnum MSH models can combine AC input power and battery power to > increase the total AC output capacity for starting heavy loads. > > Larry > > > > On Jul 3, 2014, at 7:59 AM, Drake <[email protected]> > wrote: > > This information helps greatly. I really appreciate all of your expert advice. > > 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. > > Any insights on this? > > Thank you, > > Drake > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/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: [email protected] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/[email protected]/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: [email protected] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/[email protected]/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
