This is actually a very relevant topic for me right now, so thanks for all the great information. I just had an 8kw solar system installed on my roof. According to production projections and past consumption trends this will provide roughly 70% of my annual usage. So how do I take care of the other 30%... Well, it's time to take a hard look at where I can conserve.
Also, we currently do around half our household driving on electric, and I would like to push that up in the next couple of years, so I need to actually find more than just the 30% savings. In the end I suspect that I will need to add more panels, but that will take some creativity as I got as many put on my southern facing roof as there was room for,,, I love seeing the energy collected from my roof and funneled directly into my "gas tank". My electric vehicles just became solar vehicles :) Damon ________________________________ From: EV <[email protected]> on behalf of paul dove via EV <[email protected]> Sent: Thursday, July 26, 2018 5:17 AM To: Electric Vehicle Discussion List Cc: paul dove Subject: Re: [EVDL] Charging load on the grid (NOT) 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://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.eia.gov%2Ftodayinenergy%2Fdetail.php%3Fid%3D32212&data=02%7C01%7C%7C07f09b6e70034e5dd7de08d5f31108f2%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636682176839517527&sdata=IwQq%2FAOZ3WXCL3miWx6N6IIvwIvHXjf5UEUZGTd4G%2B8%3D&reserved=0 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://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.eia.gov%2Ftools%2Ffaqs%2Ffaq.php%3Fid%3D97%26t%3D3&data=02%7C01%7C%7C07f09b6e70034e5dd7de08d5f31108f2%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636682176839517527&sdata=XmP9BPr6CSHa2FMWnhF6tQH0cvLd2KnAhOgwcfbiqo4%3D&reserved=0 > - > Independent US Energy & Information Statistics says ~10,000kwh/year. > That's 27kwh/day. > Source 2: > https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.nationmaster.com%2Fcountry-info%2Fstats%2FEnergy%2FElectricity%2FConsumption-by-households-per-capita%232005&data=02%7C01%7C%7C07f09b6e70034e5dd7de08d5f31108f2%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636682176839517527&sdata=t%2BHYCGqP%2FL%2BxKHGGN5T%2BrkJLxF0p2EzakOjsi%2B488Ew%3D&reserved=0 > - Around half that. > > What percentage of an electrical bill is comprised of lighting?: > Source 3: > https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.eia.gov%2Ftools%2Ffaqs%2Ffaq.php%3Fid%3D96%26t%3D3&data=02%7C01%7C%7C07f09b6e70034e5dd7de08d5f31108f2%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636682176839517527&sdata=bOpiCSgvkXm%2BWYLz4Oe4EPggfltaJTUnGymbz0Ex0WQ%3D&reserved=0 > - 9%. > Source 4: > https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.quora.com%2FWhat-percentage-of-energy-consumption-is-from-lighting-in-a-typical-American-house&data=02%7C01%7C%7C07f09b6e70034e5dd7de08d5f31108f2%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636682176839517527&sdata=%2FelVqRqKAXe2z2XyhW7YDAE213cbf78a1QrCFjQ9rvc%3D&reserved=0 > - 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: > https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.evdl.org%2Fhelp%2Findex.html%23usub&data=02%7C01%7C%7C07f09b6e70034e5dd7de08d5f31108f2%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636682176839517527&sdata=BCD%2BRvIFfhWPDjSH1gwfx6UVCzGYwVsodJYsjkCvy2E%3D&reserved=0 > https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.evdl.org%2Flistinfo.cgi%2Fev-evdl.org&data=02%7C01%7C%7C07f09b6e70034e5dd7de08d5f31108f2%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636682176839517527&sdata=2GEsHVMP67GRmFKQG23r9DrBXcJihqDrLVBIXC5XtDA%3D&reserved=0 > Please discuss EV drag racing at NEDRA > (https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgroups.yahoo.com%2Fgroup%2FNEDRA&data=02%7C01%7C%7C07f09b6e70034e5dd7de08d5f31108f2%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636682176839517527&sdata=V2D%2FMFaHdMRNKG8XFdnrw6plPtu6VX%2F0tmybHbfZ3yg%3D&reserved=0) > -------------- next part -------------- An HTML attachment was scrubbed... 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