[RE-wrenches] Grid Tied AC Disconnect Question

[Mark Frye]

Aaron,
 
Can you give a bit more information? Is this a situation where the meter and
the main disconnect are located on the outside of the building, with a
feeder running to a load center in the garage? Does the utility at this
location require a external lockable disconnect?
 
Mark Frye 
Berkeley Solar Electric Systems 
303 Redbud Way 
Nevada City,  CA 95959 
(530) 401-8024 
 <http://www.berkeleysolar.com/> www.berkeleysolar.com  
 

  _____  

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Aaron
Mandelkorn
Sent: Thursday, January 27, 2011 3:53 PM
To: re-wrenches at lists.re-wrenches.org
Subject: [RE-wrenches] Grid Tied AC Disconnect Question


It seems as though almost every utility has a different requirement
concerning Utility External Disconnects and the AC disconnects for the PV
system in general.  Some utilities require lockable blade style disconnects
while others will accept the backed breaker in a load panel(if outside) as
the photovoltaic AC system disconnect.  My question refers to situations
where grid tied inverters and the AC point of connection are both inside a
dwelling.  Specifically, if a grid tied inverter is located inside a garage
and it's output is connected to a back fed breaker in the main panel (also
in the garage), can the utility disconnect at the meter serve as both the
utility and PV system AC disconnect?  I see nothing in the NEC that says the
PV system's external AC disconnect has to be independent of the utilities'
disconnect.  Can this one breaker act as the disconnect for two sources of
power? Any thoughts would be appreciated.   

Aaron Mandelkorn
Renewable Energy Outfitters
P.O. Box 65  
Salida CO 81201
(970)596-3744
reosolar at gmail.com
www.reosolar.com





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