[RE-wrenches] SINGLE PHASE OUTBACK SYSTEM ON 3 PHASE SERVICE

[Dave Click]

What problems is the system having?

Regarding your proposed 3P wiring solution, I don't know whether this 
has been fixed recently, but Outbacks in 3P historically haven't 
monitored the angle between phases. Under grid-connected operation it's 
not a problem, but after they lose the grid connection, you'd be relying 
on each inverter independently and consistently putting out exactly 
216,000.00000 cycles of AC. This is only a problem with 208V 3P or 1P 
loads  on your protected load panel. Since you don't have those 
currently, you'd be OK as long as you upsize the neutral and add a 
placard stating that no 208V loads should be added.

DKC

On 2013/3/28 11:23, Bill Turberville wrote:
> I know I saw a thread on this but I cannot find it in the archive.  I
> have inherited a customer that has a four inverter Outback system, 240V
> 1 Phase, on a 208Y120V 3 Phase 4 Wire system, that constantly has
> problems.  A 208V to 240V 1 phase transformer was installed feeding the
> input, but the system still struggles.  Will this system ever work
> correctly as is, or does it need to be rewired for 3 phase and use the
> third inverter as a spare.  This would include a lot of work rewiring
> the output panel.  Any ideas?
>
> W.C. (Bill) Turberville P.E.
>
> President
>
> ECE Solar
>
> Electrical Contracting Enterprises LLC
>
> 3080 Stage Post Road Suite 107
>
> Bartlett, TN 38133
>
> 901-348-9230 ext 101 phone
>
> 901-348-2192 fax
>
> 901-289-6346 cell
>
> billturb at ece-llc.com <mailto:billturb at ece-llc.com>
>
>
>
> _______________________________________________
> List sponsored by Home Power magazine
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Change email address & 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
>