[RE-wrenches] AC (only) Diversion

[David Katz]

Carl
I missed the AC part when I answered you question.  I think an off the shelf AC diversion control would be a good idea.  I gave used outback and midnite controllers by powering a solidstate relay with the aux output to divert AC.
David Katz

Sent from my HTC smartphone on the Now Network from Sprint!


----- Reply message -----
From: "Carl Emerson" <Carl at solarking.net.nz>
To: "'RE-wrenches'" <re-wrenches at lists.re-wrenches.org>
Subject: [RE-wrenches] AC (only) Diversion
Date: Sun, Oct 14, 2012 8:14 am



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   emerson at freepower.co.nz
Web   www.freepower.co.nz

________________________________
From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at 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 <Nathan at arcticsun-llc.com<mailto:Nathan at 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
nathan at arcticsun-llc.com<mailto:nathan at arcticsun-llc.com>
Office: 907/457-1297<tel:907%2F457-1297>

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--
Chris Mason
President, Comet Systems Ltd
www.cometenergysystems.com<http://www.cometenergysystems.com>
Cell: 264.235.5670
Skype: netconcepts

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