180 karma · joined October 2, 2018
The hummer EV is around 9100 lbs.
If we assume the higher end of GVWR for a tractor trailer at 80,000 that’s 8.8 hummer EVs.
Tractor trailers are also typically size limited not weight limited for their loads, which would bring down the ratio much further.
Lastly having the weight distributed to many more tires (typically 18) instead of 4 must ease the load on the pavement, no?
It doesn’t work everywhere of course and requires some form of storage or offsetting by powering the grid during the day.
For example here’s one of the units I run at my home: https://ashp.neep.org/#!/product/56518. It has a COP (coefficient of performance) ranging from around 4 at higher ambient temperatures, down to 1.8 at 5f. So it’s just over half the electricity input per watt of heat output for me to run my heat pump at 5f.
There are newer units and units designed to run in cold environments that achiever much higher COP below freezing than my example above.