[RE-wrenches] PV Production Meter on a XW System

Chris Mason cometenergysystems at gmail.com
Mon Aug 27 10:45:03 PDT 2012


I don't believe so.

On Mon, Aug 27, 2012 at 9:38 AM, Drake <drake.chamberlin at redwoodalliance.org
> wrote:

>  Is the E-Guage a revenue rated meter, acceptable for selling S-RECs?
>
> At 10:03 AM 8/25/2012, you wrote:
>
> But you can use one e-Guage to look at 6 different current flows. The
> e-guage has 12 CT inputs, and shows all the data online.
>
> On Sat, Aug 25, 2012 at 9:17 AM, Drake <drake.chamberlin at redwoodalliance.org>
> wrote:
>  You can also use a couple of rebuilt meters from Hialeah Meter company
> that read both ways. On the AC IN, the power that is sold to and purchased
> from the grid will add / subtract to let you know the amount you sold or
> bought.  The meter to the protected loads panel will register one way to
> let you know how much power was consumed there.  If you sold more power
> than you purchased, you can add that to the protected loads panel
> production.  If you purchased more, subtract that to find your PV
> production.
>
>
>
>  At 02:23 PM 8/24/2012, you wrote:
>
> Great explanation gary.  I was thinking that between the AC1 and breaker
> in the main panel was the right place but wasn't sure.  Thanks for the help.
>
> Aaron Mandelkorn
> NABCEP Certified PV Installer
> Owner / Operator
>
> Renewable Energy Outfitters
> Box 65 Salida, CO. 81201
> (970)596-3744
> reosolar at gmail.com
>  www.reosolar.com
>
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> On Aug 24, 2012, at 11:05 AM, Gary Willett wrote:
>
>  Aaron:
>
> Manually-read legacy utility meters, in many cases, are set up to
> accumulate current flow in either direction as kWh consumed. This was done
> because dishonest people would turn the meter upside down for part of the
> month, and then put it back normal before the meter-reader showed up.
>
> My electric service has a bi-directional "smart" utility meter that
> presents a cyclic display of kWh delivered (code 20) and received (code 57).
>
> For my GTBB system, I use a GE KV2c bi-directional meter between the XW
> AC1 conductors and the grid interactive back-fed PV breaker. This provides
> a separate register for the kWh "bought" and the kWh "sold" from the XW's
> perspective.
>
> The XW inverter AC output feeds a protected loads panel, which in my case
> contains everything except the electric oven and the electric dryer. My
> 3-ton AC unit runs off the XW inverter under grid-up, but is switched off
> via a contactor when in grid-down. I have an autostart 6kW Generac EcoGen
> connected to the XW AC2 for back-up in event of an extended grid outage.
>
> The KV2c "bought" register accumulates the kWh consumed when the XW is in
> AC Pass-Thru mode or grid supplement mode (PV kW not adequate to deliver
> load demand). The KV2c "sold" register accumulates the kWh delivered by the
> XW to the main service panel. Some of these kWs power my 240V loads if they
> are active.
>
> Regards,  Gary Willett, PE
>
>
> On 8/24/2012 10:44 AM, Kent Osterberg wrote:
>
> Aaron,
>
> Is the objective to measure all of the energy produced or only that which
> is delivered to the grid? To measure the energy sold to the grid, the meter
> goes between the XW and the grid, but it must be an electronically detented
> meter that only records energy flow in one direction.
>
>
> Kent Osterberg
> Blue Mountain Solar, Inc.
>
> www.bluemountainsolar.com
> t:541-568-4882
>
>  On 8/24/2012 7:29 AM, Aaron Mandelkorn wrote:
>
> Wrenches,
>
> I would like to here some thoughts on monitoring the production a XW in
> grid tie with battery backup mode. I normally use the Sunny Island for my
> grid tie with battery backup systems and am considering going with the XW
> on my next one.  Just wondering where in the system one would wire the AC
> PV Production meter to best represent the amount of power sold to the
> grid.  We have performance based incentives around here that require
> metering of the power going back to the grid.  With the SI systems this is
> easily accomplished by putting the required meter after the sunny boy
> before going to the critical loads panel.  Any ideas about how to
> accomplish this with the DC coupled XW system? Your thoughts would be
> greatly appreciated.
>
> Aaron Mandelkorn
> NABCEP Certified PV Installer
> Owner / Operator
>
> Renewable Energy Outfitters
> Box 65 Salida, CO. 81201
> (970)596-3744
> reosolar at gmail.com
>  www.reosolar.com
>
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> --
> Chris Mason
> President, Comet Systems Ltd
> www.cometenergysystems.com
> Cell: 264.235.5670
> Skype: netconcepts
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-- 
Chris Mason
President, Comet Systems Ltd
www.cometenergysystems.com
Cell: 264.235.5670
Skype: netconcepts
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