<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">True, the 2512iX-HV model is for 12 volt systems only. The 1524iX will operate with 12 or 24 volt and can handle up to 57Voc. However, in the manual it recommends no more than 45.6 Voc for 24 volt operation with 33 to 37 volt modules. I'm guessing the conversion efficiency suffers outside that range.<div><div><br></div><div><div><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; 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"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Larry Crutcher</div><div>Starlight Solar Power Systems</div></div></span></span><div><br></div></div></span></div></span></div></span></div></span></span><br class="Apple-interchange-newline"></span>
</div>
<br><div><div>On Jan 24, 2013, at 3:07 PM, Allan Sindelar wrote:</div><br class="Apple-interchange-newline">
<meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type">
<div text="#000000" bgcolor="#FFFFFF">
<div class="moz-cite-prefix">Larry,<br>
Yes, but isn't it 12V-only output? When I called Rick Cullen to
ask if he had anything to work with 60-cell modules, he told me
only in 12V output, which we seldom encounter any more.<br>
Thanks,<br>
Allan<br>
<br>
<div class="moz-signature">
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charset=ISO-8859-1">
<title></title>
<font face="Times New Roman, Times, serif"><b>Allan Sindelar</b></font><br>
<small><a href="mailto:Allan@positiveenergysolar.com"><font face="Times New Roman, Times, serif" color="#000099"><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><p class="MsoNormal" style="margin-right: 722.25pt;"><span style="font-size: 10pt;"><font face="Times New Roman, Times,
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</b></span></p>
<span style="font-size: 10pt;"><br>
</span> </div>
On 1/24/2013 2:01 PM, Larry Crutcher, Starlight Solar Power
Systems wrote:<br>
</div>
<blockquote cite="mid:19BB2558-A414-4739-9C5A-E6EEB4681543@starlightsolar.com" type="cite">Blue Sky Energy just came out with a MPPT controller
for 60 cell modules called the 2512iX-HV. It can handle up to 270
Watts input/60 cells and 340 Watts input with 36 cell modules.
<div><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; ">
<div style="word-wrap: break-word; -webkit-nbsp-mode:
space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; ">
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after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; ">
<div style="word-wrap: break-word;
-webkit-nbsp-mode: space;
-webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; ">
<div style="word-wrap: break-word;
-webkit-nbsp-mode: space;
-webkit-line-break: after-white-space;
">
<div><br class="Apple-interchange-newline">
Larry Crutcher</div>
<div>Starlight Solar Power Systems</div>
</div>
</span></span>
<div><br>
</div>
</div>
</span></div>
</span></div>
</span></div>
</span><br class="Apple-interchange-newline">
</span><br class="Apple-interchange-newline">
</span>
</div>
<br>
<div>
<div>On Jan 24, 2013, at 1:15 PM, Jay Peltz wrote:</div>
<br class="Apple-interchange-newline">
<meta http-equiv="content-type" content="text/html;
charset=ISO-8859-1">
<div dir="auto">
<div>Hi guys</div>
<div><br>
</div>
<div>I've buying the new 6" cell x 72 cell from Trina from a
few suppliers. </div>
<div>Big yea, but same 44voc so it's an easy add to existing
systems. </div>
<div><br>
</div>
<div>A huge relief. </div>
<div><br>
</div>
<div>Jay</div>
<div><br>
</div>
<div>Peltz power</div>
<div><br>
Sent from my iPhone</div>
<div><br>
On Jan 24, 2013, at 12:11 PM, Ray Walters <<a moz-do-not-send="true" href="mailto:ray@solarray.com">ray@solarray.com</a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div>
<meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type">
<div class="moz-cite-prefix">Hi Allan;<br>
<br>
I've been in the same conundrum lately. I found that
AEE and others have 12 v modules (Solartech), but the
price per watt is double or triple. My take is that
somewhere around 200 to 400 watts, its more cost
effective to go to the GT modules with an MPPT
controller. Blue Sky makes the 1524, and 3024 that can
take up to 57 Voc, so those would work at still fairly
low cost. Unfortunately many of the other low cost MPPT
controllers won't work with the 60 cell modules. At
some point, it may actually be cost effective to just
use 60 cell modules with non MPPT controllers, and just
forget about the extra 24 cells. (I know that sounds
crazy, but PV less than $1/ watt is crazy too)<br>
<br>
I'm trying to add modules to an existing array of 8
Siemens 12 v modules, and it just doesn't work out,
except with separate controllers. <br>
Also, its amazing how much PV you can throw at an off
grid project these days for $10k.<br>
It almost makes messing around with the old modules a
waste of time.<br>
Perhaps the solution might be to remove old arrays for
customers wanting to really up size, and then reuse the
old modules for small systems?<br>
<br>
Ray<br>
<br>
On 1/24/2013 12:35 PM, Allan Sindelar wrote:<br>
</div>
<blockquote cite="mid:51018CFF.6020201@positiveenergysolar.com" type="cite">
<meta http-equiv="content-type" content="text/html;
charset=ISO-8859-1">
Wrenches,<br>
We have years of installing 36-cell (12V) and 72-cell
(24V) modules for battery-based customers. Most of our
systems are 24V or 48V nominal. Over the last few years,
sources of conventionally-sized 72-cell modules have
dried up - as cells have increased in size, most modules
and most newer factory production lines have either gone
to 60-cell (20V) modules, or 72 cells in 300+ watt
ranges. It seems that the formerly common 72 cell, 24V
modules in the 150-190 watt range, which are well-suited
to integrating into existing systems, are no longer
available.<br>
<br>
60-cell modules in the common 220-250 watt range can't
be added to an existing system unless run through a
dedicated MPPT charge controller that can convert
voltage, such as an FM, XW60, Classic or TriStar; the
added cost of any of these controllers cancels out the
low prices of the modules.<br>
<br>
Who continues to manufacture 72-cell modules? Which
distributors carry them?<br>
I am aware of three options - are there more?<br>
- Sunpower makes one module in the 245 watt range
that can be used negative ground, but it's very high
efficiency (and with high Voc/Vmp as well) and very
pricey;<br>
- Sanyo/Panasonic has 225-240 watt modules, but also
quite premium and pricey;<br>
- Ameresco bought the rights to manufacture many
former BP modules, and I think they make some. But we
had to replace lots of failed BP modules in that size
range, and are hesitant to use their technology, fearing
that the problems may persist in the continued line.<br>
<br>
Thank you for any discussion and recommendations.<br>
Allan<br>
<div class="moz-signature">-- <br>
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<font face="Times New Roman, Times, serif"><b>Allan
Sindelar</b></font><br>
<small><a moz-do-not-send="true" href="mailto:Allan@positiveenergysolar.com"><font face="Times New Roman, Times, serif" color="#000099"><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 moz-do-not-send="true" href="http://www.positiveenergysolar.com/" target="_blank"><u>www.positiveenergysolar.com</u></a><o:p></o:p></span></font><p class="MsoNormal" style="margin-right: 722.25pt;"><span style="font-size: 10pt;"><font face="Times New
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