[RE-wrenches] Fwd: Car charging station without grid

[Allan Sindelar]

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 -------- 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: stands alone, no grid connection 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? He is thinking this must be the most efficient conversion, i.e. directly without batteries or line loss of electrons to and from utility Wants the car to function independent of dirty fuel/dirty electrons He assumes less equipment; maybe less cost but the cost is not important other than as example for others Issues I see: All inverters that can produce the high voltage needed need grid power or if off grid need batteries - know of anything stand alone available? 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? 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. 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 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

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