How much energy Tesla Roadster required to travel one mile?

The Roadster's battery can hold about 55 kwh of energy, and has a range of 220 miles in between charge. How can I find how much energy the Tesla will use to travel one mile?How much energy Tesla Roadster required to travel one mile?in 1 mile, it travels 1/220 or 0.0045455 of it's total range, and uses the same proportion of it's total energy.



so 55 kw-hr x 0.0045455 = 0.25 kw-hr per mile, or 250 watt-hr per mile. 猬?br>




just for curiosity, gasoline has an energy density of 36.6 kWh/US gal

So the tesla numbers converted to miles per gallon is:

36.6 kWh/gal / 0.25 kw-hr/mile = 146 miles per gallon



.How much energy Tesla Roadster required to travel one mile?Good answer, Billruss. But (isn't there always a but??)

"just for curiosity, gasoline has an energy density of 36.6 kWh/US gal

So the tesla numbers converted to miles per gallon is:

36.6 kWh/gal / 0.25 kw-hr/mile = 146 miles per gallon"



This doesn't mean the Tesla is getting 146 miles per gallon. You need to factor in the conversion efficiency of the initial fuel used to get the electricity in the first place. Assuming we are keeping within fossil fuels, a fossil fuel power station is typically 33 to 48% efficient and this must be factored in to your calculation of mpg. to give between approx. 50-70mpg, although this also assumes 100% efficiency at the battery end. Batteries usually are only capable of returning a maximum of 80% of their stored energy, so the effective mpg will now drop to about 40-56mpg. Although the Tesla Roadster has impressive performance for this equivalent mpg (as do most electric vehicles), it is not as ecologically sound as it appears from the more simplistic analysis of its energy usage per mile when the full energy cycle is taken in to account.



in reality, doubling the mpg or more sounds a brilliant solution to our energy uses on the surface, but in reality as China and India and the whole under-developed world starts to develop personal transport usage and the west continues to utilise personal transport systems in an ever increasing way, the planet is still doomed either from over-use of limited energy resources or increased greenhouse emissions overall. The full energy cycle needs to be reduced such that total energy usage in the world is reduced. This is currently unlikely without significant world wide agreement and change on an unprecedented scale in any realistic non-catastrophic scenario.