As long as they don't tell us how clean for the environment they are,I have no problem with electric cars. Luckily there's very small number of electric cars or the coal burning grid would take a dump.

 

As a fellow surgeon, I have to think this is too cynical. So you're saying people deserve to die because of certain choices? So those who don't run HANS on track deserve to die? Obviously not the same but providing subjective judgement on a person's validity to live is not what you signed up for.

 

Tesla can't. They uses 400V system.

The supercharger station is only a 120kW unit split 2 ways.

Porsche's Mission E is on a 800V system, and they have partnered with Mercedes, BMW, Ford, etc in Europe to roll out the 800V system. Their charging stations will be rated at 350kW.

Tesla can't come close to 350kW charging without going to 800V and abandoning their existing customers.

 

The nice thing about doubling the voltage is not that it charges twice as fast. It actually causes it to charge Four times as fast (when doubling voltage, this also doubles current which results in quadrupling of power). Assuming no current regulation to restrict charge rates...

The newest Lithium Polymer batteries are capable of charging in about 7.5 minutes (8C, or 8 times capacity, or 1/8 of an hour), so charging in 15 minutes (4C) represents a 100% safety margin (makes cells last longer and lowers risk of fire).

 

Can't they start rolling out 800V systems that detect what's attached and charge appropriately?

I'm not suggesting a current Model S will be able to charge this fast. I'm saying they must be working on similar stuff for the future.

 

If the Tesla has its batteries hard-wired for up to 400v max (the onboard electronics are designed for a specific voltage), then having an 800v charging station that can adapt to the battery's voltage will still result in 1/4 the charge rate (in power) as the 800v Porsche car (will charge no faster than a Tesla 400v charger).

 

I understand that. What I mean is that Tesla could create a 2019 Model S that has an 800v battery pack. Old Model S's wouldn't charge any faster but what's to stop them from making new ones that do? They could start rolling out charging infrastructure that will work with both, though obviously only the new ones would charge faster.

 

Ok, gotcha - sounds reasonable

 

They could in theory do a 800V circuit model of course.

But their whole supercharger network is designed around the 400V system, so if they move to 800V, they have to replace that network, or at least add dual voltage capability, neither option is cheap.

 

They'd do it in stages. An 800v car could still charge slowly on the 400v system.

 

seriously dude chill with ur self righteousness. This is the kind of crap where u get yelled at for identifying a pt as male or female at bedside. PC nonsense. Stupid people make stupid choices They have stupid kids and cause problems. Then some politician decides we can save them w a new law or giving them free stuff. I want a roll cage. At least we get the real carbon buckets now

 

I care. I have deposits down for .2 GT3, .2RS, and the Mission E

Mission E sounds impressive so far.

 

So a more expensive 800v car is useless
if charges slowly as a 400v one

at least as useless as buying a race only car without any track around

 

I don't understand this logic. The 800v would charge fast at any new charging station but still be compatible with the old ones.

Where do you think a Mission-E is going to charge up quickly? Will you not be able to plug them into any older charging stations? Will they not allow you to plug it into a 110v household outlet to charge overnight?

 

He doesn't get the concept.

It would be like charging an iPad. If a 2.4A charger is used, it would charge faster, but it will also take a 1A, 1.2A, 2A charger too, just slower.