There is no more data - kW is a measure of power, kWh is energy. EOS.
poco charges you for kWh use, right. so how much do they charge me for my 1kW bulb ?? now you see you cant answer, and hopefully know why.
kWh is a "unity" representation of energy over a period of time. "kW" for "1 hr". does it mean time always has to be 1 hr, no, and i fact i could use 1kWh of energy in just 10min. why not just make it 2kW-30min ? its still 3.6 MJ ?
the definition of POWER is energy "produced" or "consumed". and to do that you cannot have a # that is missing time variable.
Watt is a rate (power). Watt-hr is POWER-
CONSUMED (power over a period of time). the result of POWER-CONSUMED is total energy for that time period, etc.
would be much easier if things were just kept in std SI units. instead of 12c per 1kWh it could be 3.3c per 1MJ <-- makes it sound cheaper too.
and those in-dash car MPG stats, are lying to you folks. better go look at how the car ECU calculates MPG's, because unless the car ECU monitors fuel flow rate with a high sampling rate (several ways to do this, no car i know of does), the MPG thingy in your dash is a feel good meter.
i have seen others monitoring tank fills (how many gallons for each fill) and recording how many miles driven after each fill. after about 5-7 fills you'll get a rather decent reading of your MPG's.