Matt, I believe this is the point the author was trying to make.
Increased efficiency will offset EVs. Click the link for current numbers. https://www.eia.gov/todayinenergy/detail.php?id=32212 Sent from my iPhone On Jul 25, 2018, at 1:08 PM, Matt Awesome via EV <[email protected]> wrote: >> Remember this factoid. > > I'm all for saving energy and obviously I'm here so I'm passionate > about EV use, but, it's also important to me to not treat this like > some kind of religion. > >> Swapping out the average American home from Incandescent bulbs to LEDs saves >> the same amount of power needed to charge an EV the American 40 mile average >> per day forever. > > Plainly, no, it won't. > >> 50 bulbs saving an average 60 watts each for 5 hours a day is 15 kWh. > > Who the hell leaves 50 lightbulbs on in their house for 5 hours a day? > > I don't even think I have 50 lightbulbs in my house, let alone leave > them all on 5 hours a day. > > Anyone with that many fixtures is putting 40w bulbs into them. And > LEDs aren't free, so, there's not 60watts savings from a 60w bulb. > > Let's try to get some more realistic numbers. > > How many Kwh does an average US household consume in a day?: > Source 1: https://www.eia.gov/tools/faqs/faq.php?id=97&t=3 - > Independent US Energy & Information Statistics says ~10,000kwh/year. > That's 27kwh/day. > Source 2: > http://www.nationmaster.com/country-info/stats/Energy/Electricity/Consumption-by-households-per-capita#2005 > - Around half that. > > What percentage of an electrical bill is comprised of lighting?: > Source 3: https://www.eia.gov/tools/faqs/faq.php?id=96&t=3 - 9%. > Source 4: > https://www.quora.com/What-percentage-of-energy-consumption-is-from-lighting-in-a-typical-American-house > - 6%. > > The split seems to vary depending on whether heat is made through gas > or electricity. Meaning the lower percentage use numbers for lighting > are from houses that use 2x as much electricity (for heat). If they're > not making heat electrically, their lighting percentage is higher (but > the same net total). > > So, we could say 27kwh/day of which lighting is 6% or 15kwh/day of > which lighting is 9% to at least be in the right ballpark (this > argument is about general scale, not really precision). > > What is the average lighting demand for a US household?: > - 27kwh*6% = 1.62kwh/day. > - 15kwh*9% = 1.35kwh/day. > > Somewhere around 1500 watt-hours a day. > > You're claiming 10x that amount in *savings* from switching to LED, > let alone total lighting use. > >> Charging an EV at 1.5kw for 10 hours a day is 15 kWh. > > Since it's not the 1970s, the average household has at least 2 > vehicles, more when there's teenagers/college kids. > > So... your "factoid" for a household is now off by a factor of 20x. > > Add in that LEDs aren't free, you're off by a factor of 25x. > > It would be more accurate to say that by switching from incandescents > to LEDs, you could expect to save enough energy to cover 4% of your > electric vehicle use. A pretty banal, unsensational, non-headlight > grabbing rhetoric for sure, but at least an accurate one. > > You can nitpick those numbers a bit, they might be off by, oh, perhaps > double, but they're not off by an order of magnitude. > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20180726/d1fb9fd9/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
