<html>
<body>
<font size=3>Carl:<br><br>
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.<br><br>
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.<br><br>
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 <i>and
</i>upgrade the garage sub <i>and</i> garage feeder to a size that would
allow the 20% rule to accommodate all RE feeds.<br><br>
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.<br><br>
If you need more clarification., contact me off-line.<br><br>
William Miller<br><br>
<br><br>
<br>
At 12:11 PM 9/2/2009, you wrote:<br>
<blockquote type=cite class=cite cite>Hello Wrenches,<br><br>
I have a prospect who has an existing PV system and a small wind<br>
turbine already in place. He is interested in adding
additional<br>
capacity via another small grid tie system. The attached
drawing<br>
outlines the existing and proposed installation. My question has
to<br>
do with the grid tie in. Given the existing connections for the
2<br>
existing DGT inverters can I connect as proposed in the drawing or<br>
would I need to perform a line side tap on the primary feed.<br><br>
Alternative suggestions appreciated.<br><br>
Carl Adams<br>
SunRock Solar, LLC<br>
Content-Type: application/pdf; name="DGT Upgrade Single Line
Drawing.pdf"<br>
Content-Disposition: attachment; <br>
<x-tab> </x-tab>filename="DGT
Upgrade Single Line Drawing.pdf"<br>
X-Attachment-Id: f_fz4g28120</blockquote>
<x-sigsep><p></x-sigsep>
<u>Please note new e-mail address and domain:<br><br>
</u>William Miller <br>
Miller Solar<br>
Voice :805-438-5600 Fax:
805-438-4607<x-tab> </x-tab><br>
email: william@millersolar.com<br>
<a href="http://millersolar.com/" eudora="autourl">http://millersolar.com<br>
</a>License No. C-10-773985<br>
</font></body>
</html>