I can tell you the difference, with my Volks G2 Forged 20", it is 5 lbs lighter than OEM wheels, but wider tires are heavier, so net weight of my 20" wheel+tire is about the same as OEM.
Front: 235/45-20
Rear: 275/40-20
However, I am losing range due to wider tire friction and wind resistance. Now think about this, hybrid and EV they are inefficient when you accelerate, you gain MPG by gliding/cruising. The Rav4 EV got so much power, acceleration with the wider wheels would have minimum impact vs. glide/cruise impact. The easier it can glide/cruise the less energy it uses.
My car with the bigger wheels I notice big difference when I cruise, the car slows down much quicker than before. This means that the more freeway (high speed), the more you are going to lose in range. On the other hand, if you drive mostly local and stop/go traffic, wider tires would have minimum impact.
Give you an example, with my OEM wheels, I can easily drive 110 miles (normal/single charge). Now with my 20" wheels, I can barely make 100 miles (normal/single charge). 80% freeway, same route to work.