I live near where the tourist buses park. There are a huge number of tourist buses that are parked overnight, then drive ~60 miles to a hotel, pick up a bunch of (often asian) clients, drive them to the four to six tourist traps scattered about the city, about 20 miles worth of driving with "full load", then drive home about 60 miles back to the overnight lot, possibly stopping off to fill up on diesel. That's not a whole lot different from school buses.
Diesel engines emit particulate matter and noxious fumes. On school buses, these are spewed out of the tail pipes, conveniently placed at schoolkid-face height. Switching to EV buses will save a lot of nastiness going into the air we breathe. This is a win based just on keeping the air cleaner around population centers. And Dominion's generating fleet is only 12% coal (based on MWH produced).
Unless they're assuming that 20% of the energy in the battery is off limits for other uses....
That is exactly what EVs do. The vast majority of the wear on a Li-ion battery [batteryuniversity.com] comes from topping it up to 100% charge, or discharging it to 0% charge. If you've ever had a laptop battery which only lasted 5 minutes, that's what happened to it. You charged it to 100% or discharged it to 0% too often, and killed it.
The strategy EV manufacturers (and many laptop makers) have adopted to ward this off is to make
I live near where the tourist buses park. There are a huge number of tourist buses that are parked overnight, then drive ~60 miles to a hotel, pick up a bunch of (often asian) clients, drive them to the four to six tourist traps scattered about the city, about 20 miles worth of driving with "full load", then drive home about 60 miles back to the overnight lot, possibly stopping off to fill up on diesel.
That's not a whole lot different from school buses.
If you look at what brand name diesel e
The benefit is not all about carbon.
Diesel engines emit particulate matter and noxious fumes. On school buses, these are spewed out of the tail pipes, conveniently placed at schoolkid-face height. Switching to EV buses will save a lot of nastiness going into the air we breathe. This is a win based just on keeping the air cleaner around population centers. And Dominion's generating fleet is only 12% coal (based on MWH produced).
That is exactly what EVs do. The vast majority of the wear on a Li-ion battery [batteryuniversity.com] comes from topping it up to 100% charge, or discharging it to 0% charge. If you've ever had a laptop battery which only lasted 5 minutes, that's what happened to it. You charged it to 100% or discharged it to 0% too often, and killed it.
The strategy EV manufacturers (and many laptop makers) have adopted to ward this off is to make