Sorry - to be clear, I'm referring to the rate Tesla charges for supercharging. Tesla has just recently started applying variable rates to many superchargers across the country, including Massachusetts.There is no such thing as off peak in Mass. It's a fixed rate. There is National Grids piece which is 14.6 cents per KWh and the supply charge which for me is 10.5 cents, that's 25.1 cents. Don't know where you are getting a 44 cent number from.