[dougingraham]

I wanted to know, In the USA, do businesses support the EV community by installing EV charging points for their customers?
Or is it upto the community to approach businesses.

There are a few businesses that do. The idea being it will attract customers eventually. But with a 70 mile range on even the less expensive OEM EV's it is not often needed to charge anywhere except for at home.

Also how popular are Level 2 15 Amp sockets in America?
Can any businesses install it?

The most popular Level 2 charge points are 30 amps 240 volt which can do 25 miles per hour recharge if the charger in the car can handle it (7200 watts). These could be installed as up to 72 amps at 240 volts but there are no cars that have chargers that can accept that much (17.3 kw) except for Tesla which can be ordered with a second 10kw charger for 20kw. Just because the EVSE can supply it does not mean the vehicle can use it. I have never seen a Level 2 15 amp EVSE. I charger from 120vac at 12 amps which is a normal wall outlet in my garage. I have never needed public charging. I would use the Tesla Supercharge network for taking road trips if Tesla would let me.

 

[dougingraham]

Pumping 50 Amps @ 240V would really speed things.
What is needed to setup such a 'home made quick charging station'?
Would a Tesla Powerwall act as the battery bank and how do we make it capable of high burst power?
Am just curious.

Also 50 Amp @ 240V also wont hurt the battery as much as these CHADemo stations that powers as much as 62.5 kW maximum power (at 125 A and 500 V). Right?

In the US a residential power service is almost always 240 volt and 200 amps. This means the max you can possibly do is 48000 watts (240*200). And you can't actually draw that much for several reasons, one of which is because you need some of it to operate the residence. Lets assume you can use half of it and you have a vehicle with a 300 volt battery. This means we have 24000 watts and at 300 volts we could see a charge current of 80 amps at the car battery. In reality the most that could be done would be about 90% of that or 72 amps. A little more when the pack is empty. For most people this would be perfectly fine. Charge time for a Leaf with a flat battery would be about 90 minutes and less than an hour to get to 80%. But all this is meaningless because the onboard chargers cannot do 24kw. But you could build a stationary charger that would plug into the Chademo port on the car and go at nearly 24kw.

To exceed that in a home is going to require using a battery storage system and moving the power from the stationary storage battery into the car. And it is going to be somewhat expensive. My batteries can accept charge at 300 amps. At the moment I have 52 cells so the nominal voltage is 166 volts. This means I would need a charger connected to a bank of batteries that can handle 49800 watts. This would be a full charge in less than 30 minutes.

Having said all that I don't see any need for it at all at home. I just plug it in to an outlet before I go to bed at night and it is charged when I get up in the morning. It is easier on the batteries too. The only place where you need the Level 3 quick chargers is along the highways so you can take road trips.