DuncanCunningham wrote:Don't worry about the two pedantic fellows in here harping about about your terminology and correcting you all the time.. this is their hobby and lose sleep at night about their clocks being 1 min off. the rest of the things they share and help you with you are totally worth it though. loves to the OCDs.
I'm sorry you do not understand, but I hope OP can: using correct units aids in communication. Not only does it prevent misunderstandings, it facilitates understanding. If I do not have to waste time and effort parsing a poorly communicated question I (and I presume others) are more likely to spend time and effort trying to give an informative answer.
OP can view an effort to communicate clearly as self interest.
Mixing up kw and kWh is very common when ICE folks discuss EVs. It is important to keep them straight. It causes major confusion when they're mixed up. Its not always clear from context. The LEAFs battery has a capacity of 40kwh while chademo has a max charge rate around 45kw. Since the values are close, if context is left out major confusion results. Another example, Tesla Model S can have a battery capacity of 100 kWh while superchargers charge at a rate of something over 100 kw.
Its similar to the difference between gallons and miles per gallon. Someone saying my car takes 10 gallons would clearly mean gas tank size, but if someone accidentally says my car gets 10 miles per gallon is completely different. The comparison doesn't exactly match, but close enough. kw indicates rate of power transfer, either use as in power consumed by motor or heat (equivalent of gallons consumed per hour, ie a rate of use), or replenished as in recharging or filling up the tank (gallons per minute to fill the tank).
There's a huge difference between using cabin heat vs seat heaters. Running AC & cabin heat (defrost) can consume more than 100x the energy of using seat heaters. Radio use is not in any way a significant power drain regardless of volume.
Defrost is so much of an issue in EVs that some manufacturers (I think Mercedes) have looked at windshield heaters.
Air friction is directly proportional to speed. If you drive twice the speed to cover the same distance, it will take twice the power. Physics. Works the same way in an ICE.
Electric motors are actually very efficient regardless of power or acceleration. Stop light racing doesn't hurt range that much as long as you use regenerative braking (not friction brakes) and keep the same top speed. ICE are much less efficient at higher power output and particularly quickly changing desired power, ie suddenly hitting the gas.