Last I ran the numbers, it seemed like on paper charging off an industrial scale generator was around 20-30% more fuel efficient per km than directly running an ICE car, but I based it on the advertised efficiency values of a random average seeming diesel car, compared to rather pessimistic charging loss and efficiency numbers for the EV. The inefficiency of even modern ICE cars is quite astonishing, even compared to the engine in a generator that can constantly run at the optimal RPM and load for efficiency.
Comment on Teslas have been consuming a lot of gasoline lately.
rtxn@lemmy.world 1 week agoDebatable, it depends on what fraction of the power was supplied by the generator. The chemical-thermal-kinetic-electric conversion incurs great losses because of waste heat, and portable diesel generators are not always built with efficiency in mind. A charging station operating on 100% diesel to power an EV is much less efficient than a modern ICE vehicle of a similar mass sans batteries.
ascense@lemm.ee 1 week ago
SpaceCowboy@lemmy.ca 1 week ago
Citation needed. Do ICE engines not get hot and therefore also have great losses because of waste heat?
Presumably a generator making electricity for a charging station would only run when electricity is needed, while an ICE engine would be losing energy to heat the entire time the vehicle is idling in traffic.
Why would a diesel generator not be made to efficient and why are ICE engines always made to be efficient? How do you know which kind of generator they were using? Why would they use the generator for 100% of the energy needed?
rtxn@lemmy.world 1 week ago
Keeping in mind that this is a hypothetical scenario and that I did point out that the overall efficiency is dependent on how much of the power is generated by renewables and how much by the on-site diesel generator:
Bytemeister@lemmy.world 1 week ago
It doesn’t really matter actually. Electric motors are so much better at delivering power, that you will get more range from a gallon of gas by towing an ‘flat battery’ EV behind a truck and then driving the EV than you will just driving the truck without towing the EV.
evulhotdog@sh.itjust.works 1 week ago
Doesn’t that highlight the torque that is available and delivered, more than efficiency of the electric motors, charging, heat losses, etc.?
There has to be a better example to prove your point than this.
vxx@lemmy.world 1 week ago
Yes it gets also hot, but the battery as well, during charging and using.