charging timer not turns off charging

yes, that is not how the timer was designed.

you can only use start or stop, not both. using start, it begins charging at the start time, and continues to completion, unless you remove the evse first.

using end, it calculates the start time based on the existing charge remaing, so the it will finish by the end time.
there is no way to get an automatic partial charge like tesla and maybe some other vehicles/

not even the 2020 prime has that capability

 

I don't understand it either. But Bisco is right. It one or the other. Toyota filled this car with great tech and then crippled it in all sorts of ways.

By the way, on of my co-workers lived in Georgia for 16 years.

 

it won't work that way. the only way to get a partial charge is to start it, and then remove the plug before it finishes. it takes some experimentation to figure out when it is the right time to remove the plug, but some have done it successfully.
no one understands toyotas reasoning, but they don't take questions.

 

I suppose you could plug the 120v evse into timer disconnect, if that's important to the owner.

 

You didn't make the timer work. The car has to be OFF to charge.

I think that if it can't finish charging before the departure time it will try to do the best it can which is keep charging as long as it's plugged in. Departure time isn't a hard time; it's just an approximation temperature can also affect its ability to finish before the set time, so it just wants to get as much energy into the battery for you as it can. I can't find your exact situation in the manual, but it's something like this:

 

I don't think you're using the timer as intended. The "Off" timer is to set a time for when you want the car to be fully charged. As you're not giving it enough time for a full charge, it's overshooting the desired time. The onboard timer is not going to do what you want it to do, it's only designed for full charges.

 

Echoing what others said, the timer is a simple mechanism, you can set the time to start or the time to finish, it has no ability for a partial charge, unless you want to take the external step of using a mechanical timer at the wall, but that has no guarantee of charge level.

Personally, I think the OP is stressing too much about battery preservation. Toyota has been making hybrid tech for >20 years and they do a good job with battery health management. Just charge it up and drive it. Look at this way: if you end up losing 3-5% more capacity over a few years relating to charging it frequently, the real world impact is slightly less range on EV (such as maybe 1-2 miles/KM), which would be powered by gas instead, which will literally be a difference of pennies. Not worth stressing over...

The same reason I say it is insanity to consider replacing a hybrid battery due to reduce capacity, unless of course it is an outright failure, since In doing so would only save pennies on the dollar, you will never make the (multiple thousands of $$) money back ahead of just using slightly more gas...

 

o/p is a funny guy