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.
At 04:42 AM 10/14/2012, you wrote:
Hi there,
Is there an 'off the shelf' low cost product that will divert
exported energy to a load?
I have put thought into this and have a simple solution but need to
know if it is worth while marketing it.
Carl Emerson
Free Power Co.
Land line +64 9 473 4286
Mobile +64 22 630 9689
Email emer...@freepower.co.nz
Web www.freepower.co.nz
----------
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Chris Mason
Sent: 13 October 2012 2:17 p.m.
To: RE-wrenches
Subject: Re: [RE-wrenches] AC (only) Diversion
It is called a reverse current relay, use it to to run on a water
heating contactor when there is current to the grid.
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.
On Fri, Oct 12, 2012 at 3:36 PM, Nathan Stumpff
<<mailto:nat...@arcticsun-llc.com>nat...@arcticsun-llc.com> wrote:
Wrenches,
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.
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?
Any thoughts or suggestions are most appreciated,
-Nathan
--
Nathan J. Stumpff - Arctic Sun, LLC
NABCEP Certified PV Installer #091209-175
NABCEP Certified Solar Heating Installer #032412-14
<mailto:nat...@arcticsun-llc.com>nat...@arcticsun-llc.com
Office: <tel:907%2F457-1297>907/457-1297
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Chris Mason
President, Comet Systems Ltd
<http://www.cometenergysystems.com>www.cometenergysystems.com
Cell: 264.235.5670
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