[RE-wrenches] Direct Grid Tie Upgrade - drawing attached

[William Miller]

Friends:

Better advice:  If you can down size a breaker in the main panel feeding 
the garage sub-panel to about 70 amps, you gain 30 amps of back feed 
capability.  Far easier and cheaper.

William




At 01:04 PM 9/2/2009, you wrote:
>Carl:
>
>To analyze these scenarios, you need to know the Maximum AC Output Current 
>possible with a given inverter.  I do not have the time to look these up, 
>I leave that to you.
>
>Assuming the breaker sizes are close to the maximum AC output amps, you 
>are above the capabilities for load side connection in both the garage 
>sub-panel and the meter/main.  The garage sub-panel can have a maximum of 
>20 amps back feed and the meter/main can allow 40 amps back feed.
>
>There are many ways to accomplish point of connection, but one approach 
>would be to provide a supply-side tap at the meter and/or main and upgrade 
>the garage sub and garage feeder to a size that would allow the 20% rule 
>to accommodate all RE feeds.
>
>In other words, the meter/main would be considered under the supply-side 
>section of the code and the garage under load-side section.  All links of 
>this chain must comply with one or the other.
>
>If you need more clarification., contact me off-line.
>
>William Miller
>
>
>
>
>At 12:11 PM 9/2/2009, you wrote:
>>Hello Wrenches,
>>
>>I have a prospect who has an existing PV system and a small wind
>>turbine already in place.  He is interested in adding additional
>>capacity via another small grid tie system.  The attached drawing
>>outlines the existing and proposed installation.  My question has to
>>do with the grid tie in.  Given the existing connections for the 2
>>existing DGT inverters can I connect as proposed in the drawing or
>>would I need to perform a line side tap on the primary feed.
>>
>>Alternative suggestions appreciated.
>>
>>Carl Adams
>>SunRock Solar, LLC
>>Content-Type: application/pdf; name="DGT Upgrade Single Line Drawing.pdf"
>>Content-Disposition: attachment;
>>         filename="DGT Upgrade Single Line Drawing.pdf"
>>X-Attachment-Id: f_fz4g28120
>
>Please note new e-mail address and domain:
>
>William Miller
>Miller Solar
>Voice :805-438-5600     Fax: 805-438-4607
>email: william at millersolar.com
>http://millersolar.com
>License No. C-10-773985
>_______________________________________________
>List sponsored by Home Power magazine
>
>List Address: RE-wrenches at lists.re-wrenches.org
>
>Options & 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
>
>
>No virus found in this incoming message.
>Checked by AVG - www.avg.com
>Version: 8.5.409 / Virus Database: 270.13.75/2341 - Release Date: 09/02/09 
>05:50:00

Please note new e-mail address and domain:

William Miller
Miller Solar
Voice :805-438-5600     Fax: 805-438-4607
email: william at millersolar.com
http://millersolar.com
License No. C-10-773985
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20090902/503c2684/attachment-0004.html>