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We have a few Kohler 20kw, 30 kw, and 40 kw units on big off grid
stuff.<br>
Great machines, get about 5000 hours before they need work. 2 wire
start, 1800 rpm water cooled.<br>
Ours had 4 to 6 cylinder Ford motors. I don't know what they use
now, or if they've changed the line recently. I found over the years
that oversizing them more, helped everything from cleaner waveform,
to running the chargers at full throttle, to having more pass
through current, and the fuel efficiency seems to better. This was
at 11,000 ft, so you would have to take some of my observations with
a grain of salt, but we replaced a 30 Kw unit feeding 4 SW4048s,
with a 40 KW, and the customer was happier.<br>
You're burning more fuel while running, but the generator seemed to
charge the batteries faster, reducing overall run time, and overall
fuel use.<br>
From looking at many Kohlers on an oscilloscope, they have an
excellent waveform, (no funny spikes, like most portable units) so I
can't imagine why a Sunny Island wouldn't work well with it, but I
never actually used one with a Kohler.<br>
<br>
Ray Walters<br>
<br>
On 9/29/2011 9:53 AM, Jeff Clearwater wrote:
<blockquote cite="mid:4E84947B.1070002@villagepower.com" type="cite">
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<div style="font-family: Helvetica,Arial,sans-serif;"><span
style="font-family: Helvetica,Arial,sans-serif;"></span>Fellow
Wrenchers,<br>
<br>
What's folks favorite Propane Gen line in the 30 KW range for
off-grid backup?<br>
<br>
SMA has limited exposure to larger generators for the SI for
approval to their list.<br>
<br>
Anybody out there know which SI's in the 30 KW range that the SI
likes?<br>
<br>
Thanks!<br>
<br>
jc<br>
<div class="moz-signature">-- <br>
Jeff Clearwater<br>
Village Power Design<br>
<br>
Renewable Energy Consultant<br>
32 Years in all Aspects of Renewables<br>
<a moz-do-not-send="true" class="moz-txt-link-abbreviated"
href="http://www.villagepower.com">www.villagepower.com</a><br>
skype: jclearwater<br>
413-559-9763<br>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br>
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