[RE-wrenches] AC Coupling

[jay peltz]

HI Larry,

I'll chime in here with the "other" option, ie no batteries at all.

Instead its a back up generator.
I've found them to be much cheaper, and if you are expecting a longer outage then weather is usually a problem ie its overcast and therefor you'll need a backup for your battery system anyway, so 
just go with the backup.

jay

peltz power


On Sep 2, 2011, at 8:51 AM, 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
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