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<DIV><FONT size=2 face=Arial>Hi Allan,</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Off-grid batteryless EV charging? </FONT><FONT
size=2 face=Arial>Perhaps if the EV battery was tapped to keep the off-grid
inverter awake, but that would void the vehicle warranty. I'm sure you
considered PV into Sunny Islands (or similar) with a small sealed
battery into Sunny Boys. I question if a</FONT><FONT size=2
face=Arial> person in SF who wants an off-grid PV system
without batteries to charge a battery vehicle is really a
customer.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Good luck,</FONT></DIV>
<DIV><FONT size=2 face=Arial>Joel Davidson</FONT></DIV>
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style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=allan@positiveenergysolar.com
href="mailto:allan@positiveenergysolar.com">Allan Sindelar</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=re-wrenches@lists.re-wrenches.org
href="mailto:re-wrenches@lists.re-wrenches.org">RE-wrenches</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, July 14, 2011 1:43
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [RE-wrenches] Fwd: Car charging
station without grid</DIV>
<DIV><BR></DIV>Wrenches,<BR>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?<BR>Thank you,
<BR>Allan<BR><BR>-------- Original Message --------<BR><BR>Allan:<BR>Monday I
sit down with an interesting fellow who sounds like a potential good customer
(has money and right enviro goals) - in SF.<BR>He brought up the idea of
discussing a car charging station for future electric car that:<BR>
<OL>
<LI>stands alone, no grid connection
<LI>no batteries - he pictures his car is home most days - he parks it and
when the sun shines it gets charged directly </LI></OL>Why that approach?<BR>
<OL>
<LI>He is thinking this must be the most efficient conversion, i.e. directly
without batteries or line loss of electrons to and from utility
<LI>Wants the car to function independent of dirty fuel/dirty electrons
<LI>He assumes less equipment; maybe less cost but the cost is not important
other than as example for others </LI></OL>Issues I see:<BR>
<OL>
<LI>All inverters that can produce the high voltage needed need grid power
or if off grid need batteries - know of anything stand alone available?
<LI>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?
<LI>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.
<LI>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? </LI></OL>Your
thoughts?<BR>Karlis<BR><BR><BR><FONT
face="Times New Roman, Times, serif"><B>Allan Sindelar</B></FONT><BR><SMALL><A
href="mailto:Allan@positiveenergysolar.com"><FONT color=#000099
face="Times New Roman, Times, serif"><U>Allan@positiveenergysolar.com</U></FONT></A></SMALL><FONT
face="Times New Roman, Times, serif"><BR><SPAN style="FONT-SIZE: 10pt">NABCEP
Certified Photovoltaic Installer<BR>NABCEP Certified Technical Sales
Professional<BR>New Mexico EE98J Journeyman Electrician<BR><B>Positive Energy,
Inc.</B><BR>3201 Calle Marie<BR>Santa Fe, New Mexico 87507<BR><B>505
424-1112</B><BR><A href="http://www.positiveenergysolar.com/"
target=_blank><U>www.positiveenergysolar.com</U></A></SPAN></FONT> <SPAN
style="FONT-SIZE: 10pt"></SPAN>
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