Since I got the car, I have followed one of YoutTube video's advice and set up a Home Profile with a timer to schedule for 7:30am departure. But after 8 months, I am question if it is even needed.

I do 99.99% of my charging at home and my goal is to charge to 85% in the off-peak hours after 12am. I am fine with charging to start at 12am and finish whenever. So it seems like I do not need a Home Profile + Timer setup and I can just use the built-in General Profile with a start time at 12AM.

Any advice?

 

The advantage to scheduling a departure time re: charging, is that the battery will be warmed up right when you get in to leave, so you should find that your range may be slightly greater than just starting to charge at say MN when the rates are low. It doesn’t matter really at all if all you’re doing is just running around town and always end up with plenty of SOC remaining when you get home, but it certainly helps in the cold weather months.

 

If you use a profile with preferred times by itself, the car will charge to a target of 100%. You need a timer to set the charge limit.

But, once you a set a timer, it takes priority. Your car will start charging as early as needed to reach the target charge by the departure time. Even if that’s outside of a preferred time.

So, in your case, you actually want a timer and no profile because the profile won’t really do anything. The car will start charging whenever is needed to reach your target by 7:30. This will usually be after midnight, but depends on your EVSE power.

Note that there is no way to set the car to start charging at midnight to some target less than 100%.

There is a charging calculator below you can use to see the results of different profiles and timer settings.

www.TaycanChargingCalculator.com

See example below. At 9.6kW and 85% target charge for 7:30am, the car won’t start charging until around 2am. Note that the car still does the 25% min, even without a profile.





The only benefit to a profile and preferred times would be if you had a short window of time and wanted to force the car to use that window as part of its charge. Then it will use as much of the window as it can.

See below where I added a profile with a preferred time from 12am-4am. Now the timer utilizes that time. But outside of this use case, profile preferred times rarely make sense and timers by themselves are the best solution.

 

Jhenson29,

thank you for this calculator - you put a lot of work in it! I am waiting for my Taycan ST GTS to arrive in October. I have a photovoltaic system ( 29 kWp) und will use a Porsche home energy manager (PHEM) in order to charge when there is energy left over. I am wondering about this:
I will have to use a profile with "optimised charging" to make use of the PHEM. If I want to stop charging at 85% i might have to use a timer with charging stop in the evening? If so I wonder if the timer will override the optimized charging, meaning it will continue to charge to 85 % no matter whether there is sun or not? Is there a way i can set up the profile and timer and use nothing but excess energy?
Kind regards!

 

We don’t have the home energy manager in the US so I don’t have any experience with it.

I’m vaguely familiar with its use with optimized charging and do think you still need a timer to limit target charge.

If it works the same as preferred times, then the timer will still be greedy, change as needed, and just use the optimized times the best it can to optimize charging, but not at the expense of not reaching the target charge.

I think that makes sense based on my other observations and the available settings. But I could very well be wrong.

Someone with a HEM would be able to answer better.