martyscholes
Well-known member
I just read a thread where a poster conflated KW and KWH. That seems to be a regular mistake, despite EVs being more common than ever. What does it take to stop the confusion? The two really are a different as horsepower and a gallon of gasoline.
So that it's noted, a coulomb is a large number (some 6.24 x 10^18) of electrons. One coulomb passing through one volt of electrical potential is a joule. A joule is a (small) unit of work. One joule per second is a watt. One thousand joules per second is a kilowatt. One thousand joules per second for an hour (3600 seconds) is a kilowatt hour, which is equivalent to 3.6 megajoules. It is a shame that KW and KWH are so similar sounding and in writing, but a KW is a thousand joules per second and a KHW is 3.6 megajoules (regardless of time).
What does it take to get this right? Am I just too pedantic?
So that it's noted, a coulomb is a large number (some 6.24 x 10^18) of electrons. One coulomb passing through one volt of electrical potential is a joule. A joule is a (small) unit of work. One joule per second is a watt. One thousand joules per second is a kilowatt. One thousand joules per second for an hour (3600 seconds) is a kilowatt hour, which is equivalent to 3.6 megajoules. It is a shame that KW and KWH are so similar sounding and in writing, but a KW is a thousand joules per second and a KHW is 3.6 megajoules (regardless of time).
What does it take to get this right? Am I just too pedantic?