What you say is true, but to be fair, it is misleading when used to compare ICE engines to EV systems. One gallon of gas equalls approximately 40 KWh. An 80KWh battery thus does have the energy density of two gallons of gasoline. However, an ICE is a heat engine with a typical energy efficiency of 20% or less. In other words, only 8 KWh of that gallon of gas is reaching the rear wheels; the rest is lost to heat.
Regenerative EV systems approach 90% efficiency, allowong that same 40 KWh of battery capacity to equal the functional equivalent;ent of 4.5 gallons of gasoline.
Talk about misleading. Your statement that IC engines are only 20% efficient is flat out wrong. Modern otto cycle engines run 30 to 35 % efficient. Makes a big difference in your comparison PLUS electric motors are NOT 100% efficient looking on google I found 77% as a number, but this was from an EV site so I suspect it’s somewhat optimistic. By the way you haven’t addressed where the power is going to come from. And don’t spew out BS about wind and solar.