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I'm sure somebody more knowledgable already mentioned this, but back
in the last century, when wiring up C40 charge controllers for micro
hydro, they were wired between the battery and the dump load, not
between the hydro unit and the batteries. Basically the turbine ran
fully loaded all the time, and when the batteries were full it
started sending a PWM regulated current to the resistor bank. I was
always under the impression that letting turbines (wind or hydro)
free wheel was a really bad idea.<br>
Again we don't do a ton of hydro, hence my initial disclaimer.<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>
<div class="moz-cite-prefix">On 3/19/2015 1:58 PM, Dan Tittmann
wrote:<br>
</div>
<blockquote
cite="mid:CAKfSoE_ZjzC3HAsNx2hoX0QDOpWwfB1vF+dzAeaJGB8CwgYC6g@mail.gmail.com"
type="cite">
<div dir="ltr"> would try contacting Deric @
<div><a moz-do-not-send="true" href="http://www.homehydro.com/">http://www.homehydro.com/</a><br>
</div>
<div>he likely will be able to help you.</div>
<div><b
style="color:rgb(255,255,255);font-family:Verdana;font-size:13px;background-color:rgb(113,128,162)"><a
moz-do-not-send="true" href="mailto:hipower@asis.com">hipower@asis.com</a></b><br>
</div>
<div class="gmail_extra"><br clear="all">
<div>
<div class="gmail_signature">
<div dir="ltr">Daniel Tittmann
<div>CTO</div>
<div>Greenwired</div>
<div><a moz-do-not-send="true"
href="http://www.greenwired.com" target="_blank">www.greenwired.com</a></div>
<div><a moz-do-not-send="true"
href="mailto:daniel@greenwired.com" target="_blank">daniel@greenwired.com</a></div>
<div>707-923-2001 (office)</div>
<div>707-206-5088 (Cell)</div>
</div>
</div>
</div>
<br>
<div class="gmail_quote">On Thu, Mar 19, 2015 at 11:26 AM,
Windsine Inc. <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:windsine@gmail.com" target="_blank">windsine@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div class="gmail_extra">You could use a triac to feed
AC from turbine directly to the dump load just before
HyperVOC using the Aux relay in classic to fire the
Triac. Then program the Aux logic to revert to normal
when turbine voltage/RPM drops from dump load loading.</div>
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra">Kinda like an Aux triggered
bypass circuit</div>
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra">
<div>Roy Rakobitsch</div>
<div>NABCEP Certified Small Wind InstallerŽ</div>
<div>NABCEP Certified Solar PV InstallerŽ</div>
<div>NYSERDA eligible Small Wind installer</div>
<div>Certified Advanced Tower Climbing, Safety &
Rescue</div>
<div>Wind/PV Design Engineer</div>
<div>Windsine LLC</div>
<div><a moz-do-not-send="true" href="tel:631-514-4166"
value="+16315144166" target="_blank">631-514-4166</a></div>
<div><a moz-do-not-send="true"
href="http://www.windsine.org/" target="_blank">www.windsine.org</a></div>
<div><br>
</div>
<div><br>
</div>
<div class="gmail_quote">
<div>
<div class="h5">On Thu, Mar 19, 2015 at 11:53 AM,
Jeff Oldham <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:starpower4u@juno.com"
target="_blank">starpower4u@juno.com</a>></span>
wrote:<br>
</div>
</div>
<blockquote class="gmail_quote" style="margin:0px
0px 0px
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<div>
<div class="h5">
<div>Finding this application quite
frustrating - Harris 120Vdc 1kW turbine,
Classic 250, 48V batt., 1200W load dump. The
manual downloaded just before purchase
stated: "This mode will NOT go to resting
even when the input has been disconnected
and will always stay awake so the turbine
has the least chance of over-spinning." It
now seems that this is not the case and this
sentence is no longer in the manual. My
installer cannot get Midnite to confirm one
way or the other and they have been guessing
for over a month on how to keep the CC from
going into RESTING that open circuits the
hydro and puts the CC into hyperVOC at 253V
and will never reconnect. To complicate
things there is also ~4kW of PV on FM60's,
when they drive up batt V. to above what the
Classic wants it drops into RESTING and back
into HyperVoc. Midnite has been very
responsive and have suggested every possible
setting and combination and my installer has
made the 3 hour RT drive far too many times
to only find the most recent "suggestion to
try" another approach not working. INSOMNIA
does not do as the name implies and still
allows the CC to step out if external
charging elevates the V above what the
Classic wants. i.e. FM60 in Bulk, Absorb or
EQ. when the Classic wants to Float. </div>
<div> </div>
<div>I fully realize that the Clipper will
deal with this for a considerable amount of
money, but I've heard of several folks using
a Classic or Outback w/o a Clipper to deal
with turbines w/o allowing freewheeling and
runaway VOC. If the turbine is not dropped
by the Classic the VOC will never exceed
120Vdc. Is there anyone of you out there
that knows:</div>
<div> </div>
<div>1) Is there a way to keep a Classic from
ever moving into RESTING, a true INSOMNIA?
If it will not do as originally stated in
the manual I need someone to step up and say
so, so we can stop guessing and wasting
time.</div>
<div>2) If so what is the secret, please?</div>
<div> </div>
<div>I really like all of Midnite's products
and they are better than most with
reasonable prices, support has always been
1st rate. This application oddly seems to
have all of us at a loss pulling our hair
out and losing money.</div>
<div> </div>
<div>With much appreciation for all input.<br>
<br>
<br>
From the Solar, Wind and Hydro powered
office of Jeff Oldham/Regenerative SOLutions</div>
<br>
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