You forgot to factor running the A/C while stuck in traffic. Imagine LA freeways when someone forgot to get a full charge before heading to work.
Also, there’s this crazy plan to use EV batteries as an energy store during the day, charged by solar. Then when the sun goes down, they will draw on that stored power until demand drops. Then they will recharge the cars. Gee, what could possibly go wrong?
I leased a Tesla S for a year in hot North Texas we have months of over 100F here. At no point during my lease did my miles per kWh go below 3 most of the time it was 3.5 to 4 kWh per mile this was in bumper to bumper grid lock over a ten mile each way commuter. EV do better in bumper to bumper traffic than ICE cars. First they don’t idle burning fuel just sitting there. They only use energy to move and then recover 80+% of that to come to a halt via regen braking. Second they use heat pumps for climate control same as a home heat pump which have SER ratings in the 13s plus cooled seats which drastically cuts even further the AC loads you cool the person first air second.
Second I have solar panels two axis tracking ones at that on my very large Texas roof. 4500sqft plus of flat roof space. It’s a 15,000 watt per hour system that hits full power 30 min after sunrise and tracks the sun till 15 before sunset. During January the shortest days of the year are still ten hours of sunlight in August it’s over 14. In August I keep my dual HVAC at 68 degrees and have never used more than 80kWh in a day. The panels are pushing 180+ kWh per day in August so I sell to ERCOT 100+ kWh per day in August. That’s well over 300 miles per day of range in a Tesla. It’s economically better for me to sell the power during the day time peak at 40 to 90 cents per kWh and buy back cheap night power at 2 to 3 cents kWh I get whole sale rates via my LLC and have gotten negative rates at night as in paid to use power which happens more than people think in windy Texas when ERCOT puts up negative rates to grid shed wind excess. With that Tesla it was charging at 2 cents or less the whole year that’s equivalent to 20 CENTS per gallon on a equal cents mile per mile basis with a ICE that gets 30mpg. The math is not hard. My panels payed for themselves in just over 4 years and have a 25 year capacity warranty, a hail rating to racketball size and have survived the baseball sized hail we got in April 2018 not a single panel was replaced the roof not under the panels was trashed and insurance covered it as it would have covered the panels as well. The inverters carry a 25 year warranty. Right now in 10,000 watt min orders 25 year panels are 19 cents per watt or less. Inverters are 20 cents per watt or less in 8000 watt inverters with a min order of 2. Solar makes perfect sense in sunny Texas we get as verified by 30 year climate data from via noaa.gov 220+ days of sunlight per year with the absolute minimum on Dec 20th at 10 half hours with maximums above 14 hours per day at this latitude.