Live data from Hacker News

The Problem with Electric Vehicles

jacquesmattheij.com

41–50 of 205 posts

Re: The Problem with Electric Vehicles

#43
A world where all cars are EVs will need many changes from the world today, but we have decades to make those changes. Take the grid capacity problem. Household electricity usage has already increased by a ton throughout the history of electrification. The grid can adapt. It takes a long time to build out this sort of infrastructure, but we have that time. Grid capacity needs to increase by 20% over the next 30-50 years? Ok, and?

The article also can't seem to make up its mind about whether EVs are suitable for long distance travel. It talks about how highway charging stations will have to be much larger than gas stations because charging takes longer. Then a few points down, it says that range and recharging time are incompatible with charging while traveling. Which is it? If it's incompatible, then you don't need highway charging stations in the first place....

Re: The Problem with Electric Vehicles

#44
post #39

These are relatively minor problems however. The gas station problem for example is solved by charging your car at home or work. Gas stations exist because we can't refuel our cars at home.

What about people who park curbside? Will their cars be spending 2 hours/night at the charging station?

Curbside chargers.

Re: The Problem with Electric Vehicles

#45
I have an electric car, a leaf. I also have solar power from Solar City.

I live in sunny MA, where in the winter we average 15kWh generated to the summer we average 50kWh. My commute is 60 miles per day which is around 6-8kW depending in traffic and weather.

Also, my local power is a mixture of nuclear and wind.

So. Can we please stop rolling coal burning power plants into the electric car equation as if it is universally applicable.

The car was affordable: $12k second hand. The solar was $0 down and half the national grid per kW. My commute is at the edge of viable for a first gen electric car (really looking forward to the 200mile range of 2nd gen).

I do the vast majority of my charging is at home. My only issue is that the current system (sic) takes DC power converts to to AC only rectify it back to DC in the car. There is still a need for charging stations, but for rare 100 mile journeys. Drive 80 miles charge for 20 minutes, drive 80 miles. 2nd gen it's 160 miles, charge for 40 minutes. We have family in Western MA, which is 150 miles away. With a 200 mile range we'd do it in a single charge and recharge at their house. The use of a charging station is really rare, not part of the routine of ownership, like it is with ICE.

We don't have the infrastructure? We don't need the infrastructure. You can run an electric car almost entirely from energy reclaimed from the environment around your house. It will even store it for you in those handy, replaceable lion batteries it has, solving some of renewable energies gnarlier problems.

Whilst I understand that electric cars don't work well for people who travel more than 100 miles without a 20 minute break, that number is about to shift to 200miles... and that is virtually nobody. The infrastructure problems are solved by local generation (either municipal renewables or home solar). The recharging problem, even at 100mile range isn't a problem, you just charge it at the end of your journey.

Re: The Problem with Electric Vehicles

#46
Can somebody explain how are EV, and especially Tesla, batteries different from, say, my laptop batteries, which normally degrade to the point of being unusable within 4-5 years, and have to be replaced?

Re: The Problem with Electric Vehicles

#48

One stop-gap hybrid solution for a number of these issues would be a gas station that has a small power generation station powered by diesel fuel. This would cancel out the ecological benefits of running an EV, even if the power station had more efficiency than a combustion engine.

You've got to burn something. Much of the electric power used by EVs in the States comes from burning coal. Diesel is the clean option.

Re: The Problem with Electric Vehicles

#49
post #39

These are relatively minor problems however. The gas station problem for example is solved by charging your car at home or work. Gas stations exist because we can't refuel our cars at home.

What about people who park curbside? Will their cars be spending 2 hours/night at the charging station?

There's no particular reason you can't install curbside chargers. It's just a matter of convincing the powers that be to allow it, and that is just a matter of EVs becoming common enough for there to be demand for it.

Re: The Problem with Electric Vehicles

#50
Problem 2:

Electric cars are charged at home most of the time. Let's assume that it takes 10x as long to charge a car at a supercharger compared to filling it with gas. (3 vs 30 minutes). But if you charge at home 90% of the time, then refueling stations can be the exact same size. And I'm fairly sure that people will be charging at home or at work much more than 90% of the time -- it's probably closer to 99%.

Post reply on HN