Esteemed Wrenches, There are other battery based inverters with Frequency Shift for use in AC coupled systems. Magnum MS4024PAE and MS4448PAE models shift the output frequency + >0.5Hz based upon battery voltage. On 24V models the set point is 0.2V above absorb voltage, and on 48V models it is 0.4V above absorb. It will protect the battery against overcharge by dropping the AC coupled Grid tied inverter offline. It can be used as a method of regulating AC coupled grid tied systems, but works best when there is a DC side diversion load controller.
Brian Faley Chief Engineer Magnum Energy 2111 W Casino Rd Everett, WA 98204 425-353-8833 bfa...@magnumenergy.com > ------------------------------ > > Message: 3 > Date: Tue, 12 Apr 2011 21:37:06 -0700 > From: "Mark Frye" <ma...@berkeleysolar.com> > To: <g...@icarussolarservices.com>, "'RE-wrenches'" > <re-wrenches@lists.re-wrenches.org> > Subject: Re: [RE-wrenches] AC Coupling Fronius IG Plus 10.0 inverter > Message-ID: <0FAC7002A96948B598E5EF79FF3D77E6@marksdell> > Content-Type: text/plain; charset="us-ascii" > > Gary, > > I have been looking at some AC coupled stuff lately. The "FSC" is > propriatary to SMA, Sunny Island to Sunny Boy. Pretty much anything else > you need something to sense the voltage of the battery bank so you can > open > a contactor on the AC line to the Fronius when the battery voltage gets > too > high. Once the voltage drops the contactor can close and bring the Fronius > back on line and then the 5-minute start up delay before it is feeding the > line again. > > Mark Frye > Berkeley Solar Electric Systems > 303 Redbud Way > Nevada City, CA 95959 > (530) 401-8024 > <http://www.berkeleysolar.com/> www.berkeleysolar.com _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
