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You could use Morning Star relay driver to control the AC dump load. I
have one for my system, but have not yet installed it, but have
programmed it on my computer. If it works as designed, it should be
perfect in conjunction with a relay. <br><br>
<br><br>
At 04:42 AM 10/14/2012, you wrote:<br>
<blockquote type=cite class=cite cite=""><font color="#0000FF">Hi
there,<br>
<br>
Is there an ‘off the shelf’ low cost product that will divert exported
energy to a load?<br>
<br>
I have put thought into this and have a simple solution but need to know
if it is worth while marketing it.<br>
<br>
<br>
Carl Emerson<br>
Free Power Co.<br>
Land line +64 9 473 4286<br>
Mobile +64 22 630 9689<br>
Email emerson@freepower.co.nz<br>
Web
<a href="http://www.freepower.co.nz/" eudora="autourl">
www.freepower.co.nz</a><br>
<br>
<hr>
<div align="center"></font></div>
<font face="Tahoma" size=2><b>From:</b>
re-wrenches-bounces@lists.re-wrenches.org
[<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" eudora="autourl">
mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of
</b>Chris Mason<br>
<b>Sent:</b> 13 October 2012 2:17 p.m.<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] AC (only) Diversion<br>
</font><font face="Times New Roman, Times"> <br>
It is called a reverse current relay, use it to to run on a water heating
contactor when there is current to the grid.<br>
This is a problem I have struggled with for ages. We do not get credit
for export so I have been looking for a good use for free electricity,
have not found one yet.<br>
On Fri, Oct 12, 2012 at 3:36 PM, Nathan Stumpff
<<a href="mailto:Nathan@arcticsun-llc.com">Nathan@arcticsun-llc.com</a>
> wrote:<br>
Wrenches,<br>
<br>
We are working on the design for a system where we will be using
grid-tied wind and solar but will not be able to net-meter the project
(we can interconnect but the meter only runs one way.) Anything we use on
site is worth 100%, any production that goes back to the grid is lost
forever to the customer. What we would like to do is monitor all solar
and wind production, monitor all usage, and then be able to dump every
watt-hour of over production as heat, there is plenty of (thermal)
storage capacity.<br>
<br>
If this were a battery based system I know how I would approach this and
what equipment I would spec, but so far I am having a hard time coming up
with a solution. Anyone have any suggestions for products or
strategies in this case? Something like an eGauge with programmable PWM
relay outputs?<br>
<br>
Any thoughts or suggestions are most appreciated,<br>
-Nathan<br>
<br>
<br>
--<br>
Nathan J. Stumpff - Arctic Sun, LLC<br>
NABCEP Certified PV Installer #091209-175<br>
NABCEP Certified Solar Heating Installer #032412-14<br>
<a href="mailto:nathan@arcticsun-llc.com">nathan@arcticsun-llc.com</a><br>
Office: <a href="tel:907%2F457-1297">907/457-1297</a><br><br>
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