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<div class="moz-cite-prefix">Jesse,<br>
There's little advantage to 24V over 48V; as you're in the
design/bidding stage, can you use 48V instead? Then one FM60 (or
Midnite Classic) is all you need. 48V also lets you use 175A
GJ-type breakers, 2/0 cables, and 1 1/2" conduit to the battery
enclosure. One of the few limitations is that with modern 60-cell
modules, you must use 3 in series - no more, no less - with
Outback controllers.<br>
Otherwise I agree with Ray that two controllers makes more sense.
<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>
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>
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On 5/24/2013 9:06 PM, Jesse Dahl wrote:<br>
</div>
<blockquote
cite="mid:FFD89046-6C34-41CA-847A-B1F9253A7451@gmail.com"
type="cite">
<pre wrap="">Hello,
I'm working on bid for a system using the FM80 controller. The specs for the controller say the maximum STC wattage for a 24V system is 2500W. The array I want to use has a STC wattage 2550. I called outback to ask if this was "close enough" today and didn't get a reply (holiday weekend?!) I also called the distributor I buy my parts through and they said it wouldn't be a problem.
I don't want to lose warranty of something happens. I don't want to use different modules. I don't want to have to add another controller and split up the array just for 50W.
Thoughts?
Have a good holiday weekend!
Jesse
Sent from my iPhone
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