Hybrid PV/Battery/Generator [RE-wrenches]

[Joel Davidson]

I thought it was SOP for PV people to misunderstand each other :-)
Bucky Fuller use to say, "It's not so important that you understand me, just
so you don't misunderstand me."

jberdner at sma-america.com wrote:

> Joel:
>
> Please don't misunderstand me, I think it is a great concept for backup
> power.  Why have a big battery bank and inverter sitting around doing
> nothing for 99% of the time when you have perfectly good power system in
> your EV ?
>
> For now load shifting with lead acid isn't cost effective even at
> California rates but it is getting close. Hopefully the EV driven
> battery revolution will give us high cycling batteries at a reasonable
> price.
>
> Has anyone tried load shifting this with NiFe (Edison cell) batteries ?
> Are new ones even available any more ?
> Given the incredible cycling performance of NiFe, I wonder if they could
> drop the round trip energy cost into the cost effective range ( < 20
> /kWh with CA TOU net metering).  The main drawback of NiFe is the high
> self discharge but in a daily load shifting application this probably
> wouldn't matter too much.
>
> Best Regards,
>
> John Berdner
>
> SMA America, Inc.
> 20830 Red Dog Road
> Grass Valley, CA  95945
> 530.273.4595 (voice)
> 530.274.7271 (fax)
>
> -----Original Message-----
> From: Joel Davidson [mailto:joeldavidson at earthlink.net]
> Sent: Thursday, June 13, 2002 3:34 PM
> To: RE-wrenches at topica.com
> Subject: Re: Hybrid PV/Battery/Generator [RE-wrenches]
>
> John, Don't be too quick to dismiss this concept. The guys at AC
> Propulsion
> are pretty sharp. I wish my Prius' 17 kWh (38 each 7.2V, 6.5 amp-hour)
> nickel metal hydride battery bank had the bi-directional connection AC
> Propulsion is developing. Picture this. Your house has a PV roof feeding
> into an inverter and your service panel with a TOU meter. You pull your
> EV
> or hybrid into the driveway and plug it in. Grid or solar power charges
> the
> vehicle battery bank if needed. If the grid needs power during peak
> periods, the utility signals all the plugged in vehicles and draws from
> their batteries. If the grid goes down, your vehicle battery bank powers
> your home. Too far out? So were solar roofs a few decades ago. Imagine
> the
> future and then make it so.
>
> jberdner at sma-america.com wrote:
>
> > Graham:
> >
> > Interesting idea but...
> > Check out some of Tom Hund's (Sandia) work on this subject.
> > As I recall, his conclusion was that the round trip cost for the
> energy
> > was about $0.35 per kWh.
> > Not quite enough to make it worthwhile even with time of day net
> > metering.
> > Perhaps the economics will be a bit better with the advanced batteries
> > in EV's.
> >
> > Best Regards,
> >
> > John Berdner
> >
> > SMA America, Inc.
> > 20830 Red Dog Road
> > Grass Valley, CA  95945
> > 530.273.4595 (voice)
> > 530.274.7271 (fax)
> >
> > -----Original Message-----
> > From: Graham Owen [mailto:graham at solarexpert.com]
> > Sent: Thursday, June 13, 2002 11:07 AM
> > To: RE-wrenches at topica.com
> > Subject: RE: Hybrid PV/Battery/Generator [RE-wrenches]
> >
> > Check out this website http://www.acpropulsion.com
> > They are developing electric cars that charge up at night with grid
> > power, then sell the power back to the grid during peak demand.  From
> > what I have been told, the founder Allan Cocconi, is a genious when it
> > comes to inverter technology.  I know this dosn't help with solar
> > projects in the works now, but there is some intersting stuff on the
> > site.
> >
> > Graham
> > GO Solar
> >
> > - - - -
> > 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
> >
> > - - - -
> > 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
> >
>
> - - - -
> 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
>
> - - - -
> 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
>

- - - -
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://topica.com/u/?bz8Qcs.bz9JC9
Or send an email to: RE-wrenches-unsubscribe at topica.com

T O P I C A -- Register now to manage your mail!
http://www.topica.com/partner/tag02/register
==^================================================================