Ian K said..Carantoc said..
Same logic says the petrol version must have a fuel tank 6 times larger than required then.
Weight and expense is driving the ev logic. The 85 kWhr battery in a Tesla weighs 540 kg at a cost of $150 per kWhr. 50kg of petrol will do the same distance, a 75 litre tank is not expensive so why not?
And weight compounds. To cart around that extra 500kg all the structural and dynamic components have to be beefed up. The whole Tesla weighs 2.1 tonnes. If we could shelve the range anxiety they could build an electric car doing the same job as a Tesla, with a range of 100km, but much lighter and cheaper. A 100 km a day is 36,500 km a year, even at 100kph that's 15 full days of the year behind the wheel! Life's too short to even think you need an ev with a range of more than 100km.
There is easy and cheap solution to convert short range city car into unlimited km monster.
In place of 2 passengers in this 4 person car - portable battery pack, hired from petrol/electric charging station.
200kg divided by energy density 300wh per 1 kg = 60 kwh !!! ~ 700 km extra range
ok, modern, popular battery have now only half of that density so let it be 30kwh.
30kwh divided by 8.5kwh = 350 km
my solar panel at home deliver not > 100kwh , that is 1100 km of free ride every day!
Then can be swapped at petrol station in 2 minutes for new, fully charged.
If still not enough , why not to attach trailer to tow bar- then we could drive all Australia around on single charge....
This extra battery pack should be hired only in preperation for longer trip, so doesn't effect vehicle price and weight for everyday commuting.