12S meter success..mostly [RE-wrenches]

[William Korthof]

<x-flowed>
Isn't the net production of the solar installation, as in:
(solar output) - (inverter night time idle losses)
exactly what we want to be measuring?

/wk

At 10:18 AM 2/29/2004, Kirk Herander, VSE wrote:
>Back to this meter thing, the 12S, 120 volt does work to monitor the output
>of a net-metered 120 vac inverter. I just installed it. It won't perfectly
>monitor the "gross" solar ac made, but rather the "net". At night the meter
>will count slightly backwards, because the inverter's internal consumption
>plus critical load power is what the utility is supplying, and only the
>critical load power will cancel out. Same when the batteries are charging
>from the grid. Power supplied is greater than critical load power. And the
>meter will count forward when there is a power failure and critical loads
>are being powered from the batteries. So the reading will not be an exact
>indication but close of solar-made AC. A relay arrangement could be designed
>to bypass the meter when these conditions exist if we really wanted to split
>hairs.
>
>
>Vermont Solar Engineering
>Kirk Herander
>North American Board of Certified Energy Practitioners
>Certified Solar PV Installer(TM)
>Xantrex Certified Dealer Charter Member
>NYSERDA-eligible installer
>Vermont Solar and Wind Partner
>
>PO Box 697
>Burlington, VT. 05402
>www.vermontsolar.com
>www.backeastsolar.com
>800.286.1252 - 802.863.1202
>fax 802.863.7908
>
>- - - -
>To send a message: RE-wrenches at topica.com
>
>Archive of previous messages: http://www.topica.com/lists/RE-wrenches/
>
>List rules & etiquette: http://www.mrsharkey.com/wrenches/etiquete.htm
>
>Check out participant bios: www.mrsharkey.com/wrenches/index.html
>
>Hosted by Home Power magazine
>
>Moderator: michael.welch at homepower.com
>--^----------------------------------------------------------------
>This email was sent to: wkorthof at earthlink.net
>
>EASY UNSUBSCRIBE click here: http://lists.topica.com/u/?bz8Qcs.bdh77H.d2tvcnRo
>Or send an email to: RE-wrenches-unsubscribe at topica.com
>
>TOPICA - Start your own email discussion group. FREE!
>http://www.topica.com/partner/tag02/create/index2.html
>--^----------------------------------------------------------------

- - - -
To send a message: RE-wrenches at topica.com

Archive of previous messages: http://www.topica.com/lists/RE-wrenches/

List rules & etiquette: http://www.mrsharkey.com/wrenches/etiquete.htm

Check out participant bios: www.mrsharkey.com/wrenches/index.html

Hosted by Home Power magazine

Moderator: michael.welch at homepower.com
--^----------------------------------------------------------------
This email was sent to: michael.welch at homepower.com

EASY UNSUBSCRIBE click here: http://lists.topica.com/u/?bz8Qcs.bz9JC9.bWljaGFl
Or send an email to: RE-wrenches-unsubscribe at topica.com

TOPICA - Start your own email discussion group. FREE!
http://www.topica.com/partner/tag02/create/index2.html
--^----------------------------------------------------------------



</x-flowed>