Hi Larry, Magnum MS PAE inverters do indeed shift the inverter output frequency when the battery is full in order to disconnect grid-tied inverters used in AC coupled systems. It was designed to work in conjunction with a DC diversion load - which is recommended if the system is larger than a couple panels.
Regards, Brian Faley Chief Engineer Magnum Energy 2111 W Casino Rd Everett, WA 98204 425-353-8833 [email protected] > > Larry Brown wrote: > > Wrenches, > > > > After Hurricane Irene left a lot of people without power here in the > > Northeast, customers who have grid-tied systems are asking about some > > battery backup to power some essential loads. > > > > We have used Sunny Islands but they require either 2 Sunny Islands or > > a step up transformer to get 240 volts for the well pump. Schneider > > Electric (Xantrex XW) inverters look like they would work for this > > application and do 120/240 volt output as well and we have used these > > in off grid applications but not as AC coupled. I have considered > > Magnum because they also do 120/240 volts but they need battery > > diversion to ensure the batteries are not over charged. > > > > None of these systems are going to be rewired as a DC system so I am > > looking for any feed back on what others are using to AC couple to > > existing grid-tied systems to provide some battery backup. > > > > Thanks > > Larry > > > > Larry Brown > > Sun Mountain_______________________________________________ > > > > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > 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: [email protected] 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
