11–20 of 281 posts
30 minutes to charge...still puzzled why Tesla has gone with the recharge model rather than the battery swap model ala Better Place.
Because the battery swap model doesn't exist. It's a cool idea, but it's not right here right now.
I was looking forward to this announcement and watched the live announcement. The most interesting/surprising parts of the announcement to me was: 1. Superchargers are already deployed in California. Nice work, Tesla, for building it out and proving it works. 2. The whole U.S. will be covered in a few years. Great for traveling cross country. 3. It's solar-powered. I wonder if they have a electricity backup... probab…
3. It's solar-powered. I wonder if they have a electricity backup... It's grid electric powered. The canopy doesn't do much. Let's calculate: Guess that the canopy for each bay is 7 by 4 meters, 28m^2 Sunny spots receive about 4kWhr of solar power per square meter per day. Solar panels might be 25% efficient. Total daily power: 28m^2 * 4kWhr/m^2/day * 0.25 = 28kWhr/day Model S has an 85kWhr battery, half charge is 42…
Each solar power system is designed to generate more energy from the sun over the course of a year than is consumed by Tesla vehicles using the Supercharger.
wtf?
Earlier quoted context omitted.
Because the battery swap model doesn't exist. It's a cool idea, but it's not right here right now.
You can build swap stations incrementally though just like they are building these supercharging stations, so I don't see what the difference is, other than swapping is quicker/better.
30 minutes to charge...still puzzled why Tesla has gone with the recharge model rather than the battery swap model ala Better Place.
I was looking forward to this announcement and watched the live announcement. The most interesting/surprising parts of the announcement to me was: 1. Superchargers are already deployed in California. Nice work, Tesla, for building it out and proving it works. 2. The whole U.S. will be covered in a few years. Great for traveling cross country. 3. It's solar-powered. I wonder if they have a electricity backup... probab…
3. It's solar-powered. I wonder if they have a electricity backup... It's grid electric powered. The canopy doesn't do much. Let's calculate: Guess that the canopy for each bay is 7 by 4 meters, 28m^2 Sunny spots receive about 4kWhr of solar power per square meter per day. Solar panels might be 25% efficient. Total daily power: 28m^2 * 4kWhr/m^2/day * 0.25 = 28kWhr/day Model S has an 85kWhr battery, half charge is 42…
They're sizing the installations in partnership with SolarCity, one of Musk's other start-ups. They claim they'll be sized such that it will generate as much energy over the course of the year as the vehicles consume. Meanwhile, you're estimating power output from a CG rendering on a marketing page.
You could argue whether or not they're lying, but they're certainly not incompetent. SolarCity's sizing calculators take these (and many more) variables into account.
30 minutes to charge...still puzzled why Tesla has gone with the recharge model rather than the battery swap model ala Better Place.
Because the battery swap model doesn't exist. It's a cool idea, but it's not right here right now.
What makes you think this is not a viable solution?
Earlier quoted context omitted.
You can build swap stations incrementally though just like they are building these supercharging stations, so I don't see what the difference is, other than swapping is quicker/better.
You're forgetting that in the case of Telsa's car the entire battery pack is a part of the undercarriage and hot swapping in that case is quite difficult.
I was looking forward to this announcement and watched the live announcement. The most interesting/surprising parts of the announcement to me was: 1. Superchargers are already deployed in California. Nice work, Tesla, for building it out and proving it works. 2. The whole U.S. will be covered in a few years. Great for traveling cross country. 3. It's solar-powered. I wonder if they have a electricity backup... probab…
3. It's solar-powered. I wonder if they have a electricity backup... It's grid electric powered. The canopy doesn't do much. Let's calculate: Guess that the canopy for each bay is 7 by 4 meters, 28m^2 Sunny spots receive about 4kWhr of solar power per square meter per day. Solar panels might be 25% efficient. Total daily power: 28m^2 * 4kWhr/m^2/day * 0.25 = 28kWhr/day Model S has an 85kWhr battery, half charge is 42…
The SunTech panels [1] produce a nominal 295W and are 2 x 1M so in your 6 x 4M square you can put 12 panels, nominal output 3.5Kw, my system is 90% "efficient" (5.2 kW Panel rating, 4.7kW delivered to the grid) assuming the same that is 3.15kW delivered to the grid. over a nominal 6 hr solar 'day' that is about 18kWhr/day. So the duty cycle on a power station would need to be one fill up every 3 days. If the travelling is mostly on weekends I could see the stations getting a couple of fillups on the weekend and having 5 days of no visitors. Time will tell. It is handy that Elon's the primary stockholder of Solar City :-) Good discount on panels.
[1] http://www.solarsystemsusa.net/solar-panels/by-brand/suntech...