Got some charging questions here in the US...

[Mile2424]

Got some questions for those that have their cars and some experience with charging on a regular basis. For those charging at home using a normal 220V outlet, how long does it take to obtain a full charge? I was under the impression it was around 8-9 hours or overnight?

I was also trying to understand how useable or the advantage of the 19.2kW on board charger which most cars don’t see to have optioned. After searching on the forum it sounds like this isn’t super trivial for US homes and that added circuitry and electronics have to be put in place for this to even work.

Appreciate the help and guidance.

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[Td78]

Got some questions for those that have their cars and some experience with charging on a regular basis. For those charging at home using a normal 220V outlet, how long does it take to obtain a full charge? I was under the impression it was around 8-9 hours or overnight?

I was also trying to understand how useable or the advantage of the 19.2kW on board charger which most cars don’t see to have optioned. After searching on the forum it sounds like this isn’t super trivial for US homes and that added circuitry and electronics have to be put in place for this to even work.

Appreciate the help and guidance.

If you have a 50 amp circuit, your charger should be set to charge at 40 amps (continuous load at 80% of a circuit's max is typically accepted in the US). 240 volts x 40 amps = 9,600 watts (call it low 9.x kilowatts since a 240 volt circuit isn't usually 240 volts and the charging loss). With 87 kwh of usable battery capacity, you take 87 kwh / 9 kw and you get 9.7 hours.

Keep in mind that you will rarely charge from 0 to 100%. Some people on the forum have pretty neat setups that could use the 19.2 kw charger. Most of us are stuck with garages that can charge at 9.6 kw at best. You will likely find that is plenty. Only time that likely wont be more than enough is if you are at the track or on a road trip. And then you just need to plan ahead

 

[daveo4EV]

https://www.taycanforum.com/forum/threads/charger-math-how-does-it-all-work.200/

 

[daveo4EV]

to know how long it takes to charge you need to know how much power you need

you can use 3.2 miles per kWh as a rough guide

if you know how far you drive on a daily basis you can divide the miles by 3.2 to get a rough idea of of how many kWh’s you need - then you can take the kWh and divide by your charging rate to get to a rough idea of hours to charge for that many miles.

 

[daveo4EV]

https://www.taycanforum.com/forum/t...age…for-those-that-wish-to-over-do-it-….2343/

 

[LonePalmBJ]

to know how long it takes to charge you need to know how much power you need

you can use 3.2 miles per kWh as a rough guide

if you know how far you drive on a daily basis you can divide the miles by 3.2 to get a rough idea of of how many kWh’s you need - then you can take the kWh and divide by your charging rate to get to a rough idea of hours to charge for that many miles.

Taking the math a little further, if you are using the PMCC that comes with the Taycan plugged into the recommended NEMA 14-50 circuit (where you'll get ~9kW charge rate) the math simplifies to this:

Miles Driven divided by 28.8 equals hours needed to recharge.

So, for example, if you drive 100 miles in a given day it will take just under 3.5 hours to recharge.
If you drive 29.2 miles in a day (the average driven daily in the US according something published by AAA in 2015) it will take almost exactly an hour to recharge.

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