Upgrade Charging Setup at Home

[TourSpecGolfer]

I am building a home now and can setup pretty much any electrical situation to charge my Taycan or any future EVs i may own. i have credit with the electrician for some changes I made and wanted to ask the forum a few questions:

What would be the ideal setup for charging? I already have a 50amp for the RV but want something future proof as now is the time. Dream setup?

Next question, I am in america, is it possible to use Tesla chargers with my taycan? I do have these options if it matters at all:

19.2kw on board charger
on board 150kw/400V DC charger

what is the best adapter to purchase exactly?

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[Flying ace]

For your car and home, the "dream" setup is to install a hardwired 100 amp/80 breaker to take advantage of the 19.2 kw AC charging speed. This is a rare option and rarely used option in the US as most homes and public AC chargers top out at 50 amps. This will allow a empty to full charge in about 5 hours instead of 10.5 hours on a 50 amps. You'll also need a home charger capable of this speed, the Porsche Mobile Connect is capable, albeit leaves a lot to be desired.

The practical approach would be to install 3 dedicated 50amps breakers for 2 EVs and your RV IMO.

For Tesla, download the app, and configure the app to select your car to find stations. Today you can only charge at select MagicDock stations (built in adapter). Tesla has not fully rolled out VW Group compatibility yet, so you only have available a few stations. Simply buying a NACS-to-CCS adapter will not work.

Here's more reading on both topics:

https://www.taycanforum.com/forum/threads/would-you-upgrade.19071/

https://www.taycanforum.com/forum/t...tesla-supercharger-access-in-june-2025.23349/

 

[Flying ace]

Personally for me, the true dream would be to get local permits to install one of these 480v bad boys and run a personal DCFC, haha. If you're zoned for mixed commercial and residential like a farm, you might have a chance to get the permit.

480v setup at minute 5:30

 

[TourSpecGolfer]

Do you think a hardwired 100 amp/80 breaker for 19.2 kw will be a format widely used in the future in case i switch from a Taycan to something else a few years out?

 

[daveo4EV]

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

 

[hifi239]

Do you think a hardwired 100 amp/80 breaker for 19.2 kw will be a format widely used in the future in case i switch from a Taycan to something else a few years out?

Nobody knows for sure, but I'd say no. I bet the overnight rate of 50A, 11 kW will remain standard because having the spare 80A capacity in most people's panels is rare. Even a spare 50A is uncommon. So why put that big inverter in the car? There are only a handfull of public Level 2 chargers that go beyond 11kW in the USA.

If you want to take advantage of your 19kW, the Porsche solution for 19 kW is called the "Porsche Wall Charger Connect," but I'd get an Enphase.

A 50A hardwired Chargepoint Flex is a fine choice for normal rate home charging. You can get adapters for J1772 to NACS and vice versa. Another popular choice is the Tesla universal that comes with NACS and J1772.

The things you want to get right in the first place are the wiring (6AWG THHN or better) and the charger placement for ease of reaching multiple cars.

 

[whitex]

Do you think a hardwired 100 amp/80 breaker for 19.2 kw will be a format widely used in the future in case i switch from a Taycan to something else a few years out?

The circuit will provide 19.2kW for any future EVSE or charger, should standards change - the
"format" for split phase 240V AC home power is not going to change, or all you appliances would have to change. I have 3 19.2kW EVSE's, all sharing a 19.2kW circuit - 100A breaker, they all talk to each other sharing 80A, so if only one car is charging, it can get the full 80A, if 2 cars are charging, each gets 40A, etc. I have 2 EV's in the garage, each is actually able to utilize the full 19.2kW (same option you have). That same setup used to charge two Teslas in the past. If switching between Tesla and non-Tesla cars, you can use inexpensive adapters, or in my case I just replaced the cable with a native J1772 for the non-Tesla cars(kept the old cables in case I ever want to switch back).

So to simplify the advice for future proofing when building a new home, have the builder run 100A circuit to the garage, ideally run it to junction boxes on both sides and maybe even front and back of the garage as well. This will simplify current and future installations of EVSE's - notice that location of a charge port varies between different brands, even models, so the most convenient location for an EVSE depends on the car you're charging.

Once you have a 100A junction box on all sides of the garage, you can choose your EVSE, but that's a separate discussion. For now you'll probably want to install 80A capable, so more limited choices, even more limited if you want a load sharing one (so if you were to get a second EV, you could just add a 2nd EVSE to the same circuit) without having the replace the original one you installed. Unfortunately the only 80A load sharing EVSE I know of has been discontinued (Tesla HPWC Gen 2), so if you want load sharing you're limited to 48A max (unless you hunt down some of the discontinued EVSEs). Or, you could just install a Tesla Universal Wall Connector, it's only 48A but fully scalable with load sharing for up to 6 units, plus is has built in adapter for Tesla and non-Tesla EVs. This would be the most economical future proof solution with options available on the market today, but you do give up the 80A charging that your Taycan could take advantage of today. So you'll have to ask yourself, do you really need 80A at home? I have it, but honestly it's convenient maybe once a year, and if it was 48A I could still make due, maybe make an extra trip to a DC charger nearby that one time a year.

Now, if you really want to future proof the house and willing to spend the money, you could look into 2-way chargers (like the Ford Charge Station Pro) - they allow your car to power you home in case of a power outage. Taycan does not support pulling energy out of is battery, but a growing number of EVs are supposed to (today I only know of Ford supporting this, but it is a standard, so the Ford 2 way charger should work with other EVs that support 2 way). The Ford Charge Station Pro is actually an 80A EVSE too, so would max out your Taycan's capabilities. The reason I said this would be more money is it will require additional wiring and hardware for it to be able to power your home.

 

[Jhenson29]

Do you think a hardwired 100 amp/80 breaker for 19.2 kw will be a format widely used in the future in case i switch from a Taycan to something else a few years out?

Regardless, get the biggest panel you can (within reason….) in the area you park cars and it’ll be easy to split for modify from there as the future will be hard to predict. I have a 125A panel in my garage. That’s the biggest I could do without upgrading my incoming service.

 

[Flying ace]

Do you think a hardwired 100 amp/80 breaker for 19.2 kw will be a format widely used in the future in case i switch from a Taycan to something else a few years out?

no this is basically your use case here: https://www.taycanforum.com/forum/threads/would-you-upgrade.19071/post-293537

You would have to come home with no charge, be home for maybe 1-2 hours, but need at least 120-ish miles by the time you leave home such that you will deplete that range, AND you don't have time to stop by a DC fast charger.

Here's a example why you don't need it: https://www.taycanforum.com/forum/threads/would-you-upgrade.19071/post-293643

In Europe 19.2kw (22kw there) is more common at office parks, and parking garages whereby people are there for 2-8 hours and they get a full charge. But most home scenarios, you're charging while you're sleeping, and with a 50 amp 9.7 kws, you'll charge in 8 hours anyways.

 

[whitex]

You would have to come home with no charge, be home for maybe 1-2 hours, but need at least 120-ish miles by the time you leave home such that you will deplete that range, AND you don't have time to stop by a DC fast charger.

Not the only scenario. Few years back my wife used to have a scenario where she drove a bunch in the morning, then came home for a couple of hours, then did a bunch more driving in the afternoon. No convenient DC charger along the way, so a DC detour would cost at least half an hour every day. She could actually do this in the summer with 40A, but during the winter faster charging at home gave her sufficient buffer to do this comfortably.

Everyone's usecase is different. I know of multiple folks who have 3.8kW (240V/16A) charging at home and that satisfies all their EV driving needs. Average daily commute in USA is 42 miles. People come home for 10+ hours. So for an average daily commute, a 2kW charging would suffice.

When building a new home, I would wire in 100A circuit, as it will accommodate multiple EV's (more and more people have more than one EV), as well as larger EV's (trucks, SUVs). The difference in cost at home building time is not that much.

 

[RAHRCR]

Do you think a hardwired 100 amp/80 breaker for 19.2 kw will be a format widely used in the future in case i switch from a Taycan to something else a few years out?

Pretty unlikely. As EVs continue to develop in terms of efficiency, we’ll eventually see smaller batteries that don’t need anywhere near 19kw.

 

[ze_shark]

If we see a counter trend toward smaller batteries, i doubt it will be because of efficiency. EVs are already ~90% efficient so there are not that many gains left.
The paradigm change would come from batteries capable of charging multiples faster, which will still have to confront the physics of Ohm's law - and require high power.

I struggle to see a future where one would not want/need to charge at 20kW at home.

 

[whitex]

As a reference, for my Taycan, charging ar 19.2kW means the car charges about the same amount of time as it was driving. If I drive for a couple of hours, it takes a couple of hours to recharge. With half that, it would take two hours of charging for each hour of driving, which for most people is sufficient.

Does one NEED 19.2kW at home? For most people, the answer is no - you can get by just fine at lower charging at home. Then again, do people NEED a fast accelerating Porsche Taycan? Again, no, you can get from point A to point B in much, much less expensive cars. Do I enjoy driving my Taycan, heck yea. Do I like having 19.2kW in my garage, again, heck yea. With 2 EVs I would have installed 2 EVSEs anyways, wanting at least 40A for each, instead I have 3 EVSE's which share 80A (and a couple of NEMA 14-50's as backups, 40A each).

 

[Jhenson29]

If we see a counter trend toward smaller batteries, i doubt it will be because of efficiency. EVs are already ~90% efficient so there are not that many gains left.

I almost commented something similar, however, there are other ways to improve efficiency such as reducing rolling resistance and drag. I don’t think either are likely to be significant enough in any near future to have a meaningful impact as it relates to desired charging power, but the possibility exists. At the end of the day, the efficiency that’s relevant to charge power is miles per kWh, which is more than just the electrical efficiency.

 

[Higgilicious]

I have the 19.2 option on my car 2021. When I built my house in 2019/2020 I put 2 50A outlets (separate circuits).

If I did it today, I’d probably do two 60A. Or a 125A subpanel to the garage. Although the Ford Charge Station Pro mentioned above seems like a nice solution.

I use the Tesla universal connector (built-in adaptor.)

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