<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">HI Allan,<div><br></div><div>I'm with the folks who have said the following.</div><div><br></div><div>1. larger. 15kW-25kW</div><div>2. water cooled</div><div>3. prime rated</div><div>4. brand is one that there is a local repair/warranty supplier.</div><div>Onan/Kohler are the most common in this size that I know of.</div><div><br></div><div><br></div><div>The larger 15kW water cooled units I've had a chance to work around are pretty impressive machines. Yes its larger than you need and even if you don't increase the charging, its going to be worth it.</div><div><br></div><div>Good luck let us know what you decide/find.</div><div><br></div><div>Jay</div><div>Peltz Power</div><div><br></div><div><br><div><div>On Jan 9, 2012, at 7:59 PM, Allan Sindelar wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
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Wrenches:<br>
We have cautiously agreed to take on a substantial upgrade and
rehabilitation of a poorly designed 48V off-grid system. Our upgrade
will include a substantial array addition, battery replacement, and
charge controller/safety disconnect replacement. But the immediate
need is for a generator. The 6 year old system has worn out two Onan
residential standby generators; the second one just now (at winter
solstice) has failed completely.<br>
<br>
We expect to keep the two SW5548 inverters. The site is at 7,800'
elevation. The fuel must be LP. The customer is willing to pay for a
high-quality unit. We expect only to specify or recommend the unit,
but not resell it, so there's no profit motivation involved; we just
want the best solution..<br>
<br>
I am looking for recommendations of a low-speed, liquid-cooled,
commercial- or industrial-grade LP generator, of at least 12kW and
preferably around 15kW, with a good reputation for long-term
reliability, and that is not designed for home standby use (with
phantom-load heaters and controls). It will be located outdoors, so
must have a weather enclosure.<br>
<br>
I occasionally am asked to answer this same question by Home Power
readers, who assume I know the answer because I wrote a primer on
generators for HP awhile back. Truth is, I don't have any good
recommendations in this size range, and I'm really hoping that some
of you experienced off-grid Wrenches who have done larger systems
can help here.<br>
<br>
Thank you,<br>
Allan<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>
<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><p class="MsoNormal" style="margin-right: 722.25pt;"><span style="font-size: 10pt;"><font face="Times New Roman, Times,
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