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<div class="moz-cite-prefix"><br>
Ray will also hopefully respond here. Bergey opted to sell the
combination of Classic, turbine control box and XL.1 turbine and
take on the<br>
warranty for over-voltage installations, like this one . The
data logs show 400+ volts which is as high as the CL250 goes. They
assumed that their<br>
blade design will self limit the RPM and thus, the highest voltage
produced in most situations. The Clipper makes the system cost
more.<br>
I am surprised at how many of these systems have survived without
the Clipper. High sustained winds is the problem.<br>
If a storm is brewing and the customer is at the sight, at least
there is a brake switch in the control box so that could be set
before-hand.<br>
The Clipper can keep the turbine speed down to approximately what
is needed to keep the controller in the Absorb or Float stage and<br>
keep down noise and bearing wear as well as the voltage. The dump
load resistor values have been tweaked for the XL.1 so<br>
it works pretty well when the AC Clipper is used.<br>
<br>
One thing that a single 48V nominal turbine and using MPPT for
wind does is to keep from having to stock and sell multiple skews.<br>
They have also shipped many turbine stators that were wound
wrong.... more like 24V. Those will work ~OK~ for 24V systems but
not<br>
very well for 48V. Unfortunately, the 48V customers that receive
those stators have had to call Bergey and get new stators,<br>
(wound for 48V), which they have to swap out. It seems to me
that it would be much easier just to ship the correctly <br>
wound stators or at least find out what battery voltage the system
is designed for so they can ship the lower voltage<br>
stators for 24V or 12V systems.<br>
<br>
boB<br>
<br>
<br>
<br>
<br>
<br>
On 2/19/2014 6:56 PM, All Solar, Inc. wrote:<br>
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<div>Ray, </div>
<div>Are you referring to Midnite's wind turbine control box,
which is what comes with the Bergey?</div>
<div>It does not include any diversion for slowing the turbine. I
questioned why they did not use the clipper, but did not really
get an answer. We have installed 2 of the Excel 1s in the last 6
months with no problems. I also believe the clipper would take
care of it, just have no experience with it yet. <br>
<br>
Jeremy Rodriguez,
<div>President<br>
<div><br>
</div>
<div>All Solar, Inc.
<div>1463 M<br>
<div>Penrose Colorado 81240</div>
<div>719-372-3808 office</div>
<div>719-372-3804 fax</div>
<div><a moz-do-not-send="true"
href="http://www.asolarelectric.com">www.asolarelectric.com</a></div>
<div><br>
</div>
<div>Sent by Jeremy's iPhone. Sorry for typos and
shorthand!</div>
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On Feb 19, 2014, at 2:27 PM, Ray Walters <<a
moz-do-not-send="true" href="mailto:ray@solarray.com">ray@solarray.com</a>>
wrote:<br>
<br>
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<div class="moz-cite-prefix">We've done some research on this,
as we're doing an XL.1 project at 12 v right now. <br>
I don't have first hand experience with the Clipper yet, but
I have over a decade of XL.1 experience and many years with
Midnite's electronics. The Clipper is exactly what is
needed. It also moves the rectifier down to the ground, and
offers a braking disconnect system to shut the turbine down
completely if needed. <br>
The Classic by itself isn't really controlling the turbine
speed, and counting on the XL,1 mechanical governing design
by itself is definitely full hardy.<br>
Unfortunately, Bergey's new staff is not really up to full
speed yet on what is needed to make their turbines work long
term. At least they've abandoned the old XL.1 controller.
Hopefully the turbine itself hasn't changed too much; I've
seen them survive some very high speed winds and direct
lightning strikes.<br>
<pre class="moz-signature" cols="72">R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760</pre>
On 2/19/2014 1:39 PM, Chris Daum wrote:<br>
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cite="mid:EFF56A6F9B1C4AE6B84B4A9FDBA307E4@OasisChris"
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<div><span class="234062720-19022014"><font color="#0000ff"
face="Arial" size="2">Hello Wrenches:</font></span></div>
<div><span class="234062720-19022014"></span> </div>
<div><span class="234062720-19022014"><font color="#0000ff"
face="Arial" size="2">We have a customer who's got one
of the Excel One wind gennies, and he's burnt up two
Classic controllers (overvoltage....the 2nd time it
got over 400V before it burnt up). Bergey's been
dragging their feet as to why this is happening;
they're saying it's probably an "upslope site" where
the RPM just gets too high, among other things.
Metering tests prove that the stator is OK.</font></span></div>
<div><span class="234062720-19022014"></span> </div>
<div><span class="234062720-19022014"><font color="#0000ff"
face="Arial" size="2">They also said that Midnite
Solar has a 'clipper' to prevent overvoltage; do any
of you have any experience with this device? It's
~$1200, and of course there is no mention of this on
Bergey's web site or in their XL.1 manual.</font></span></div>
<div><span class="234062720-19022014"></span> </div>
<div><span class="234062720-19022014"><font color="#0000ff"
face="Arial" size="2">I have several other XL.1s in
the general area, but they are on their old 24V
controller. So I am looking for more information on
anyone who's using this 'clipper'.</font></span></div>
<div><span class="234062720-19022014"></span> </div>
<div><span class="234062720-19022014"><font color="#0000ff"
face="Arial" size="2">Please feel free to contact me
off list.</font></span></div>
<div><span class="234062720-19022014"></span> </div>
<div><span class="234062720-19022014"><font color="#0000ff"
face="Arial" size="2">Thanks!</font></span></div>
<div><span class="234062720-19022014"></span> </div>
<div><span class="234062720-19022014"><font color="#0000ff"
face="Arial" size="2">Chris Daum</font></span></div>
<div><span class="234062720-19022014"><font color="#0000ff"
face="Arial" size="2">Oasis Montana Inc.</font></span></div>
<div><span class="234062720-19022014"><font color="#0000ff"
face="Arial" size="2">406-777-4309</font></span></div>
<div><span class="234062720-19022014"></span> </div>
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