Backfeeding a 200 amp panel with an Outback 3048 [RE-wrenches]

[wratterman at SunEnergyPower.com]

Hi....this is Walt

No...he meant 175 amp breaker. The rule is that you cant have FEEDER
breakers, to the bus, at any more than 20% over the bus size.  If the
bus is 200 amp, and the breaker is 200 amp, you are limited to 40amp on
another INPUT breaker - the PV breaker.  You can have a total of 240
amps of feeder breakers.

So, if you can change the main breaker to 175 amps then you have 25 amps
plus 40 amps of headroom, or 65 amps available to you to add the PV
input breaker.  This is assuming that this is a residence.

Hope this helps.

Walt

-----Original Message-----
From: Andrew Truitt [mailto:atruitt at gmail.com] 
Sent: Wednesday, October 11, 2006 1:49 PM
To: RE-wrenches at topica.com
Subject: Re: Backfeeding a 200 amp panel with an Outback 3048
[RE-wrenches]


Do you mean 275A?


On 10/11/06, Allan Sindelar <allan at positiveenergysolar.com> wrote:
>
> Andrew,
> Nope, if it has a 200A main breaker; 40A is all you get. If you put in
a
> 175A main breaker, OK.
> Allan
>
> ----- Original Message -----
> From: "Andrew Truitt" <atruitt at gmail.com>
> >
> > Is it legit to backfeed a 200 amp main panel with the 1 pole, 60 amp
> > breaker that is recommended for the Outback FXGT 3048 considering
the
> > 20% rule?  I know that most of that amperage is pass through, as the
> > most a 3kW inverter should be able to produce at 120V is 25 amps,
but
> > the manual says that the largest instantaneous output current is 70
> > amps.
> >
>
>
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-- 
Andrew Truitt
System Designer
Standard Solar Inc.
(301) 296 - 4373
andrewtruitt at standardsolar.com


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