SMA does make such a device. It is called the Smart Load. "If there is an electricity surplus, the Smart Load feeds it into special loads, for example heating cartridges in a hot water tank. The control system is completely automatic, lightning fast and free of retroactive effects for other loads. This continuous and quick energy consumption allows for ideal protection of system components and guarantees increased reliability." (off our site). This device is not UL listed, but can be obtained if desired.
It is possible to do this with other devices, just not sure of part numbers and such. I will look into it, if I find something I will let you know. SMA America, LLC Steve Jefferson Sr. Technical Service Specialist, Sunny Family 6020 West Oaks Blvd, Suite 300 Rocklin, CA 95765 - 3714 U.S.A. Tel: +1 916 625 0870 Fax: +1 916 624-2445 Service Line +1 877 697 6283 (Toll Free) Email: steve.jeffer...@sma-america.com www.SMA-America.com This email and any attachments thereto may contain SMA America, LLC confidential, privileged and private material for the sole use of the intended recipient. Any review, copying, or distribution of this email (or any attachments thereto) by others is strictly prohibited. If you are not the intended recipient, please contact the sender immediately and permanently delete the original and any copies of this email and any attachments thereto. Thank you. -----Original Message----- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Mark Frye Sent: Wednesday, April 13, 2011 10:36 AM To: 'RE-wrenches' Subject: Re: [RE-wrenches] AC Coupling Fronius IG Plus 10.0 inverter Thanks Brian, My understanding is that the SI/SB combination is the only grouping of equipment that provides proportional control of the output of the AC coupled inverter. But, this is what is love about AC coupling, there are so many ways to skin so many different kinds of cats. I really like the DC diversion side solution if you have someplace to put the power instead of just the batteries, although that might be generally less commonly available for retrofits into existing on-grid households. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -----Original Message----- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Brian Faley Sent: Wednesday, April 13, 2011 10:21 AM To: re-wrenches@lists.re-wrenches.org Subject: Re: [RE-wrenches] AC Coupling Fronius IG Plus 10.0 inverter 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 _______________________________________________ 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 _______________________________________________ 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
