If you are not using brakes, extra car weight only matters aboutdmacarthur wrote: ↑Sun Apr 11, 2021 1:41 pmMister Grumpy here will bet large bills that the RAV (or any other car of its weight, for that matter) will NEVER get 120 MPG when used beyond the EV capability. Drive, say, 200 miles, 40 on the battery and 160 on the ICE, you MAY see 60 MPG but Grumpy doubts it. And as for the RAV mileage when used for long trips: Grumpy doubts 45 but is willing to listen to real life stories. Too much finagling of numbers, let us see some actual info.....
RR*g*m*1000 joules per km
g - 9.8
m - extra car mass in Kg
RR -- tyre rolling resistance, in the range of 0.009 -- 0.011
An extra 100 kg of mass, presuming 0.01 RR, works out to 10k joules per km = 4.47 Wh/mile.
So a 200 mile jaunt without extra braking in a 500 Kg heavier car requires 4.5 kWh extra to offset the weight.
And if you are using brakes, regen recoups 30 - 50%
My experience with a Toyota type PHEV was a year ownership of the Prime. That car had about 5.3 kWh usable capacity between charges and I drove it 90 miles each time. I was a careful driver and mostly drive ~ 60 mph. I used to average 90-ish mpg in the Colorado winter and 110 - 125 mpg in benign weather. That few people will drive as I did is a given, but you should reconsider your wager because it is approaching the do-able at the lower end of the legal highway speed limit. FYI -- the RAV PHEV has 18.1 kWh nominal capacity. Back in the day Toyota allowed ~ 65% of nominal as usable for NiMH. I'm not sure if that has changed for the RAV.