On 7/14/2011 1:43 PM, Allan Sindelar wrote:
Wrenches,
I'm stumped as to the best approach for a customer who wants a
non-grid-tied, batteryless PV-powered EV charging station. See below,
from one of our salespeople. Any ideas?
Thank you,
Allan
So, does this car in the car charging station not use batteries ?
If not, what does the charging station charge ?
Is he sure that he just doesn't need a charger for high voltage batteries ?
boB
-------- Original Message --------
Allan:
Monday I sit down with an interesting fellow who sounds like a
potential good customer (has money and right enviro goals) - in SF.
He brought up the idea of discussing a car charging station for future
electric car that:
1. stands alone, no grid connection
2. no batteries - he pictures his car is home most days - he parks
it and when the sun shines it gets charged directly
Why that approach?
1. He is thinking this must be the most efficient conversion, i.e.
directly without batteries or line loss of electrons to and from
utility
2. Wants the car to function independent of dirty fuel/dirty electrons
3. He assumes less equipment; maybe less cost but the cost is not
important other than as example for others
Issues I see:
1. All inverters that can produce the high voltage needed need grid
power or if off grid need batteries - know of anything stand
alone available?
2. Power or voltage fluctuation as panels see more or less sun; ie
hours of day or clouds, etc - what will be the output from inverter?
3. Without tieing into grid investment in PVs (both his financial
and the embodied for manuf.) gets wasted when car fully charged
or car not home and sunny.
4. Is total amps output in peak sun even going to meet the charging
requirements? ie takes 10 days to recharge instead of 4 hours -
or overly massive system to match rate of charge?
Your thoughts?
Karlis
*Allan Sindelar*
_Allan@positiveenergysolar.com_ <mailto:al...@positiveenergysolar.com>
NABCEP Certified Photovoltaic Installer
NABCEP Certified Technical Sales Professional
New Mexico EE98J Journeyman Electrician
*Positive Energy, Inc.*
3201 Calle Marie
Santa Fe, New Mexico 87507
*505 424-1112*
_www.positiveenergysolar.com_ <http://www.positiveenergysolar.com/>
_______________________________________________
List sponsored by Home Power magazine
List Address: RE-wrenches@lists.re-wrenches.org
Options& settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules& etiquette:
www.re-wrenches.org/etiquette.htm
Check out participant bios:
www.members.re-wrenches.org
_______________________________________________
List sponsored by Home Power magazine
List Address: RE-wrenches@lists.re-wrenches.org
Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out participant bios:
www.members.re-wrenches.org
