[McRat]

It seems like the most junior engineer at JLR was put in charge (har) of the recharging system.

At a minimum, it was designed by folk who have no practical EV driving experience. The list is long, and I won't even harass them about the charging problems with the app.

1) No lighted charging port. This is a important feature that is cheap to implement.
2) No 7kW L1/L2 EVSE included in the production car. It was included in the prototypes, and ALL Teslas, even the $45k one, and some other EVs have true L2 cables with them as well. It's not much more than an L1 cable.
3) The car needs to show charging status while charging. Because if somebody sees no light on the car, they will assume you are not charging.
4) Locking the cable to the cars for L1/L2 charging is not necessary, and just increases the cost and things that can go wrong. Ditto for locking the charging door. Nobody can siphon electrons out.
5) The car does not like EVSEs that delay charging.
6) Should have had a 3ph and 277v options to future proof it. 277v is the voltage you see in parking lot lights or commercial buildings and Tesla supports it. 3ph is the power the power commercial buildings and much of Europe is wired for. It should be an option, only those who want to pay for it should have to. Because it takes 3x the on-board circuits. Added bonus? Slow 208vac L2's are common at destinations. A 3ph charger will make it run at full 240vac speed. For the US crowd, let me give you a taste of what it would do for a work or destination charger. Using only a 30 amp circuit breaker and 10 gauge wire (cheap), and obeying the 80% rule, that is 24 amps per phase. So for 208 service - 8.6 kW with a thinner, lighter, cheaper charging cable. For the more common 480 service, 20 kW charging, charge 20% per hour after losses. 277 loses less % efficiency. Now our normal 1-ph 32a x 240v L2 charging is 15% faster when using 277 1ph. Note that it is simply a component and firmware decision to make an EVSE or on-board charger accept anywhere from 90 to 277 VAC. Not a significant cost since wires and components are rated far higher than 240 volts.

 

[McRat]

I am having a different charging problem. Car charges properly - am using an adapter to my Tesla charger. The charge indicator while driving drops dramatically with city driving and/or freeway driving. I have kept track for 3 days and basically there is a difference of about 48% between the odometer which I believe is accurate and the charge. Example, charge indicator will go from 240 to 192, and odometer will go from 1121 to 1145. Went to service, the coolant leak was discovered and repaired, thought that would fix the problem but above has now been happening since the car was picked up from service. Advice? Lemon?

The "miles left" estimator is just that, an estimator. If you always drive the same route, at the same temp, using the same technique, it's pretty accurate. It 'learns' your driving style.
I drove 155 miles yesterday and the range estimator was very pessimistic when I left.
Then I drove 155 miles back this AM and the estimator exaggerated my possible range.

First trip was based on my recent previous driving, which was driving like a fool, bursts of speed over 100 mph, floor it at many stoplights, go deep into corners before braking. So it 'learned' I drive like an animal. But then I drove calmly the next day. So it guessed too low. Now it adjusted it's guess, but on the way back I used more power per mile than the day before, so it overestimated.

PS - Teslas do not estimate range based on your driving style, like 99% of other cars sold today. If a Tesla says 310 miles, it can yield from 180 miles to 400 miles, but will always say ~310. They might as well just put a voltage gauge in there.

 

[McRat]

If you have a different EVSE, try that so you can isolate the issue.

Throttling is a normal function when heat sensors report a high value. ie - a bad heat sensor can cause it.

Some 'smart' EVSEs report their temperature and can also throttle.

I've mapped a 0-100% charge and it was very linear on the demand side.

I do know the JLR mobile app does not report charging data correctly.