Does D.C. Quick Charging Matter.

For me and many others the answer is no. For some absolutely. But very few. If you need DC Quick Charging you should think twice about buying electric.

There are several different rates of charge out there for EV cars and Plug-in Hybrids.

This is the rate at which when plugged in the battery will replenish it’s charge or refuel so to speak.

If you own a gas burning car you probably never thought about this. You pull up to a pump and in 5-10 minutes you are on your way with a full tank of gas. If you have a 10 gallon gas tank like my Prius it might take longer to swipe your credit card and get approval before the pump turns on.

If you drive an SUV with a 30 gallon tank It may take 3-5 minutes. The maximum rate at which fuel may be dispensed in the USA is 10 gallons per minute. Costco claims that they change their fuel filters when the flow rate falls below 8 gallons per minute.

So now let’s transfer some of this knowledge to EV’s. A pure BEV (battery electric vehicle) has a 24 kWh (kilowatt hour) battery or that’s how big it’s “fuel” tank is. The fuel being electricity.

Most BEV’s today with the exception of the Tesla and Toyota RAV4 EV have batteries that size or smaller.

The capacity of the chargers in BEV’s and Plug In Hybrid EV’s  start at 3.3 kilowatts, which is the norm for 2011 and 2012 Nissan Leafs, later base-model Leafs, and all 2011 thru 2015 Chevy Volts.

Later model year Leafs above the base model increased that rate to 6.6 kilowatts, and the 2016 Chevy Volt is up to 3.6 kilowatts, which, GM says, is enough to recharge its 18.4 kWh battery overnight using a standard 120V home outlet.

Now it’s still a bit more complicated. The speed at which your car can accept the electricity is not the same at which the outlet and charger can deliver it. Many of you already know this if you have tried to charge an iPad with an iPhone charger. If you use an iPhone charger on an iPad it could take more than twice as long to charge it. The charger actually converts the AC current from the wall socket to DC current that the battery needs. The iPad charger does it at a greater rate. And so the same thing with the onboard charger that comes with most EV’s.

Then there are the charging cords and “The Brick” that come with the EV. The Ford, Leaf and Chevrolet come with 110v chargers that plug in to your standard 15 AMP wall socket. Using this charger can can take almost 18 hours to recharge a car that has about a 10% charge left.

If you are like many Nissan owners you probably sent your charger in to a company to have it upgraded to handle a 220v connection on a 30 AMP outlet like your dryer runs on. I did.

But it still doesn’t charge as fast as if you are plugged into a 40AMP dedicated outlet with a EVSE Charger made to handle the higher electrical load. What can take the 110 charger 18 hours can be done by the 30AMP charger is 9 hours and the 40AMP charger is 5 or less hours. As long as you have a 6.6kW converter on your car.

The 110 charger works for me 80% of the time. I actually didn’t use anything but that charger for the first 5 months I owned my car.

Now I use my 220v charger more often because I am using more miles per day. When I drive 70 or so miles a day it goes on the 220v. It also goes on that to get the lowest price electricity in the shortest amount of time.

I also have a house with my own garage. If you have to fill up at work or at public chargers you probably want the highest capacity charge connection available. There are DC chargers out there where if your car is capable you can charge your battery up to 80% in less than 30 minutes. The problem is these chargers are few and far between and many aren’t well maintained. I don’t think a person with a 24kWh battery is going to need one.

If you have a Tesla or large battery like most car makers are saying they will have in the future then you at least need the highest capacity charger and EVSE you can get your hands on.

Like airlines you need to choose a car that has the right range and battery capacity to do the route that you are going to use it on. Batteries are not just costly but heavy. Carrying around extra costs in range and dollars.

Most people will not charge on the road. They will charge at home, work or both. If you drive over 80 miles a day and can’t afford a Tesla the DC Quick Charge probably won’t be your answer. A car like a Volt will be.

A BEV with a 80 mile average range like most out there today are really urban commuter vehicles. They are not road trip cars and never will be Quick Charge or not. At highway speeds they get about 1 hour at full charge, not 80% charge. At 80% you’d be stopping every 40-45 minutes if there were chargers that close together. Then another 30 minutes filling up. Who has that kind of patience. On the other hand like a Tesla with about a 200 mile range at 80% and a 30 minute break every 3-4 hours on a road trip that makes sense.

If you live or work where you can’t charge at all don’t buy a BEV. If you can charge at home, work or both get the highest capacity converter on the car you want. Then if you need or occasionally need a relatively quick 5-9 hour charge  get a 220v EVSE charging cord for when you need it.

If you want to drive BEV as often as possible but can only charge at 110v get a Plugin Hybrid like a Volt.

In the next year or two when the carmakers introduce 200 mile 40plus kWh batteries your going to not only want but need the largest capacity electrical connections you can get to take advantage of the large battery capacity they will have. What good is a 100 gallon tank if the pump only delivers 1 gallon per hour.

And speaking of only pumping one gallon per hour. That’s actually pretty good for electricity.

My Ford has a 96 eMPG. If it takes about 5 hours to fill my battery at the fastest charge rate that means at it’s fastest charge rate I’m only pumping 1 gallons worth of electricity in 5 hours. The gas version of my car would need about 3 gallons of gas to go the same distance.

That’s why I fill up every day instead of every 3 or 4 days. But since I’m using electricity and filling up at home my electricity is equal to $1 a gallon gas.

If you own a Tesla most of this advice goes out the door. You have a big battery with the onboard capacity to charge quickly. The only limitation is your home electrical system.