[RE-wrenches] Utility disco DC?

[Travis Creswell]

Keep in mind that a battery based system could sell to grid with no PV
input.  Yes, it would require reprogramming (which can be easily done on
site) and ignoring the fact that your can’t do for very long or without some
other charging source.  Our local utilities have approximately an equal mix
of battery-less and battery based systems so they pretty much take the
stance that the disco must be on the AC side.  They typically are unwavering
about requiring the disco to be within feet of the meter which would negate
the benefit of installing it on the DC side in my experience.

 

Regards,

Travis Creswell

Ozark Energy Services

 

   _____  

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of David
Brearley
Sent: Tuesday, September 02, 2008 3:28 PM
To: drake.chamberlin at redwoodalliance.org; RE-wrenches
Subject: Re: [RE-wrenches] Utility disco DC?

 

One of my previous colleagues negotiated this on a high profile project in a
new jurisdiction. The inspector didn’t have a problem with this. 

You should definitely talk to the AHJ. It’s not a difficult case to make: no
PV input = no inverter output. 

Good luck,

David


On 9/2/08 2:56 PM, "Drake Chamberlin" <drake.chamberlin at redwoodalliance.org>
wrote:

Hello Wrenches

Can the lockable utility disconnect be DC?  Has anyone tried this?   On an
add on system we found this had been done.   It would be convenient to use
this method.   

Thanks,

Drake 



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David Brearley, Technical Editor
SolarPro magazine 
NABCEP Certified PV Installer ™
david.brearley at solarprofessional.com
Direct: 541.261.6545
Fax:  541.512.0343

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