kW is 1,000 watts. Watt is a unit of power, which is calculated by multiplying current with voltage.
Current is how fast the power is flowing, and is measured in amps. Think of this as what you control when you open the spigot on a hose. When it’s barely open and trickling, you have very few amps. When it’s wide open, you have a lot more amps.
Voltage is how powerful that current is. 30 amps at only 12v isn’t providing nearly as much power as 30 amps at 120v. But you still need just as big of a hose(wire) to deliver it. So if you have a standard garden hose(household wiring), you can get more power by turning up the voltage to deliver those amps in more powerful form, which is why 240v is common in power-hungry appliances and cars.
So at this point, we know that power(watts) = current(Amps) * volts. How do you measure how much power is delivered? That’s where time comes in. A kilowatt-hour is a kiloeatt(thousand watts) delivered over the course of an hour. If you turn the faucet on at a certain rate(current) and voltage to reach 1,000w flowing out, a kilowatt-hour is how much water is in the bucket after an hour.
An 80 kWh battery can hold 80,000 watts delivered over an hour(think supercharger). That’s the same amount of energy as 1,000w delivered over 80w(think 120v charging).
Hopefully, my tortured metaphor makes sense. It gets a lot easier when you wrap your head around the basics.
