[RE-wrenches] AC Coupling

[Brian Faley]

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
bfaley at magnumenergy.com
 
> 
> 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_______________________________________________
> >
> >
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