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<div class="moz-cite-prefix">Lars,<br>
With the old Trace inverters? Were they 4.01 firmware or
4.10/4.30? Did you use the GTI? How did you AC couple them - which
input/output terminals? <br>
And what was the rationale in an off grid scenario - distance to
sun in a shady forest? <br>
I didn't know this was possible.<br>
Thanks, Allan<br>
<br>
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<font face="Times New Roman, Times, serif"><b>Allan Sindelar</b></font><br>
<small><a href="mailto:Allan@positiveenergysolar.com"><font
color="#000099" face="Times New Roman, Times, serif"><u>Allan@positiveenergysolar.com</u></font></a></small><font
face="Times New Roman, Times, serif"><br>
<span style="font-size: 10pt;">NABCEP Certified Photovoltaic
Installer<br>
NABCEP Certified Technical Sales Professional<br>
New Mexico EE98J Journeyman Electrician<br>
Founder and Chief Technology Officer<br>
<b>Positive Energy, Inc.</b><br>
3209 Richards Lane (note new address)<br>
Santa Fe, New Mexico 87507<br>
<b>505 424-1112</b><br>
<a href="http://www.positiveenergysolar.com/"
target="_blank"><u>www.positiveenergysolar.com</u></a><o:p></o:p></span></font>
<br>
<br>
<span style="font-size: 10pt;"> </span> </div>
On 5/28/2013 11:53 AM, lars Ortegren wrote:<br>
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<blockquote
cite="mid:!&!AAAAAAAAAAAYAAAAAAAAAMbJnbVLqW1LimHsbDa1NkHCgAAAEAAAAG7YkiuKZK5FphyU8uDwXj8BAAAAAA==@cal-solar.com"
type="cite">
<pre wrap="">We have done a number of off grid AC coupling projects over the last eight
years. We have found they are successful with anything that comes close to a
true sign wave, including some of the old Trace inverters. I would be
careful to not come too close to the wattage of the source inverter, and
keep in mind that your battery charging is only one stage (bulk), and might
not be the best choice without another charging source (i.e. the grid, or a
semi regular generator). I can't say it makes a lot of sense, but when we
have tested grid tied inverters and charge controllers side by side, the GT
inverters produce significantly more than any CC's on the market.. Any more,
I think that it is a better design to have the larger array tied to a GT
inverter, and a small array tied to a charge controller for absorb and float
charging...Just sayin.
Lars Ortegren
Director of Operations
California Solar Electric Company
10141 Evening Star Drive, Suite 6
Grass Valley, CA 95945
<a class="moz-txt-link-freetext" href="http://www.californiasolarco.com/">http://www.californiasolarco.com/</a>
Phone : (530)274-3671
Fax: (530)274-7518
California C-10 Electical Contractor #779624
NABCEP Certified PV Installer # 091110-89
Certified NABCEP Continuing Education Provider
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