The BB inverter will drive the grid inverter off frequency because it is full/floating and the grid tie will stop producing power. This is how AC coupling works but if something goes wrong, like programming gets corrupted by surges or the battery hits an LBCO or HBCO AC power will stop. Or if this is being controlled by Soc and it gets wrong data or there is a network issue, or all of the other things that can happen that I have not thought of.
Why do you not want to build a normal DC couples system? I forget fast....Happy Hour! Dave Angelini Offgrid Solar "we go where powerlines don't" http://members.sti.net/offgridsolar/ e-mail offgridso...@sti.net text 209 813 0060 On Sun, 3 Nov 2019 16:17:39 -0800, Mark Frye <ma...@berkeleysolar.com> wrote: > Folks, > > Please allow me to ask another question: > > Suppose I have a bi-direction inverter/charge with no connection to the > grid. > > I have GT inverter ac coupled and producing 2000w. The battery is in > float, and I have 2000w of load connected. All is well. > > Now suppose I remove the loads without disconnecting the GT inverters. > > The word is that something bad happens now. I would like to understand > what that bad thing is. > > I have one explanation that I think says that the GTs will continue to > produce the 2000w, and that energy will go into the batteries in an > unregulated fashion. When does this end, when the batteries blow up? Is > that the consequence of not disconnecting the GT? > > With many thanks in advance for your help in understanding. > > 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
