Transferring 23,5 kWh in 30 minutes represents an energy transfer of 47 kJ/s (or 47 kW).
A domestic plug in the UK can deliver 2.86 kW (and I suspect that a domestic circuit in the US would have similar limitation) and they would take 8.2 hours to fully charge the battery. If the car only had one plug which was designed to accept 47 kW, then it would overload a domestic circuit which is why there are two plugs. In the UK, we pay about £0.12 per unit (kWh) for electricity (plus a standing charge), so it would cost £5.64 to recharge the battery fully. From: [email protected] [mailto:[email protected]] On Behalf Of Mark Henschel Sent: 07 June 2014 03:15 To: U.S. Metric Association Cc: U.S. Metric Association Subject: [USMA:53920] Re: Odometer at 2 Mm I note the electric vehicle charging station at my college, Madison Area Technical College has two types of plugs installed by the local electric utility and the cheapskates expect you to put in a credit card to pay for the electricity that they supply to charge your car. Do you see industry as standardizing around one basic electric plug or is there still some uncertainty as to what the eventual standard will be? I see Ford also has a plug in energ-C available on special order here. On Thu, Jun 5, 2014 at 9:48 AM, Michael Payne <[email protected]> wrote: I’m sure Tesla is designed in millimetres, I’ve been very interested in this car, it is too expensive for me as well, hard to justify. I’ve had a look at the literature for Tesla in Europe and find that it’s mostly written from a US centric point of view, many of the examples use miles and other non metric units. Not the brightest marketing people. I just ordered a Renault Zoe which I believe is the Nissan leaf in the USA. I’m very impressed with the car, the range is rather short at 150 km but there are a number of places to recharge at the dealer’s 23,5 kWh charge station while you have a coffee for 30 minutes. The normal in home charger puts out 7,5 kWh on 220 Volts. Mike Payne On 05 Jun 2014, at 08:52, Mark Henschel <[email protected]> wrote: I see there might be some of you out there that have an open mind concerning solar energy. If so, you might be interested in the raffle of the Tesla coming up in Illinois by the Illinois Solar Energy Association in a few months. I found it interesting that my accountant was interested in a Tesla. She is heavily invested in coal, natural gas and oil, so for her to come out in support of electric cars that can be powered by the Sun is something significant. I'm not sure if the Tesla is metric or has metric speedometers or temperature measurements, but this might be a way to find out. I am not a $60,000 car guy, I am more of a $20,000.00 car guy (if I can get a loan) or maybe even $3,500.00 if I have to pay cash. Anyway, tickets for the raffle are $100.00 and you can get four tickets for $300.00. Just check out the Illinois Solar Energy Site at www.illinoissolar.org <http://www.illinoissolar.org/> for details on buying raffle tickets. Years ago there was a strong metric proponent (besides me) in the Illinois Solar Energy Association, but I think Ken Woods might have died or retired by this time. Mark On Tue, Jun 3, 2014 at 10:40 AM, Mark Henschel <[email protected]> wrote: Speaking of the planet Earth, there are some very quick solar energy calculations that can be made using the fact that 10,000 km is the distance from the North Pole to the Equator. Let's suppose the Solar Constant is 1 kilowatt per square meter. Thus for every square meter of the planet Earth, we get 1,000 watts of energy. I know it is actually a bigger number than that, but I want to make the math simple. So let's look at a square kilometer. That is 1,000 meters by 1,000 meters or 1,000,000 square meters. Thus, for every square kilometer of Earth, we get 1,000,000,000 watts of energy from the Sun. All the time. For free. Except at night, but that problem can be solved using pumped water storage facilities such as are in place in Ludington, Michigan. But I digress. Now, if every square kilometer of the USA gets 1 billion watts of energy from the sun whenever the Sun shines, (about five city blocks squared or in Chicago, 25 square city blocks of area), how much does the USA get, and can we be energy self-sufficient from solar energy alone? Well, suppose the USA is 4,000 kilometers from the Atlantic Ocean to the Pacific Ocean. Then 2,000 kilometers from Canada to Mexico. This gives us 2,000 times 4,000 or 8,000,000 square kilometers,. Multiply 8,000,000 square kilometers times 1 billion watts per square kilometer and we get, wow, 8 followed by 15 zeros, or 8,000,000,000,000,000 watts, certainly more energy than the USA uses in an entire year. Mark On Fri, May 30, 2014 at 10:09 AM, <[email protected]> wrote: I reached 2 Mm upon arriving to work this morning (see photo of odometer). Two megameters is 5% of the circumfrence of Earth (see other photo). Just for fun, have a look at this survey https://www.surveymonkey.com/s/G9YG2VX and see if you can correctly answer quetsions 8 and 9 about riding a bike at 20 km/h (you can find other surveys at Metric Pioneer). ----- Message from [email protected] --------- Date: Tue, 17 Dec 2013 21:28:31 -0800 From: [email protected] Subject: Odometer To: "U.S. Metric Association" <[email protected]> Cc: Metric Pioneer <[email protected]> Greetings all. I installed a CatEye Velo 5 Bicycle Computer at end of July 2013 CE and Friday the odometer turned a thousand kilometers. I was inspired to take a photo, which is kind of blurry, but it reads 1000.0 on odometer. I peddle a little over five kilometers each way to work and back, so my daily commute is about the same distance (almost 11 km) from surface of ocean to bottom of Mariana Trench, which is currently deepest part of any Earth ocean. My weight was over 100 kg but since I switched from bus to bike and started eating less, I have brought my weight down to around 90 kg and hope to lose even more. I attach photo of blurry odometer reading and bike (that my son bought for me on Fathers Day) with Metric Pioneer bumper sticker proudly displayed. I would be happy to send any recipient of this email a free Metric Pioneer bumper sticker; just reply and let me know where to send it. Thanks. David Pearl MetricPioneer.com 503-428-4917 ----- End message from [email protected] ----- David Pearl www.MetricPioneer.com <http://www.metricpioneer.com/> 503-428-4917
