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Joel,<br>
Use a Magnum PAE system for this. Their MS4448PAE with current
firmware has frequency-shift capabilities, to allow control of the
Enphases' output when the grid is down. The GT output should not
exceed 80% of the Magnum(s) rated output; stacking is allowed here
if needed. They still recommend a dump load as a fail-safe, although
they're working on a diversion load accessory. I think there's
technical material on Magnum's website showing how to do this.<br>
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
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<span style="font-size: 10pt;">NABCEP Certified Photovoltaic
Installer<br>
NABCEP Certified Technical Sales Professional<br>
New Mexico EE98J Journeyman Electrician<br>
<b>Positive Energy, Inc.</b><br>
3201 Calle Marie<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>
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<br>
On 4/13/2012 6:07 PM, Joel Davidson wrote:
<blockquote cite="mid:F65C1D177A804E0C8548B8DFAC9B731D@JOEL"
type="cite">Wrenches,
<br>
I have a customer who wants solar modules and Enphase inverters,
but he also wants PV and battery backup power during a grid
outage. Are any wrenches doing this? How? Thanks for sharing your
knowledge.
<br>
Joel Davidson
<br>
<br>
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