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Normally if its seeing a max of 16amps that is what the car sees the charge point advertising, if you stop it and then start it again from the app does it then show 32? Or does it require you to unplug and plug back in before it will then see 32?
You could try a scheduled charge using the supplied UMC running in Granny charge mode @ 13A for an hour or so, to make the car “learn” it now has 10A max from a 13A supply. Then go back to your normal charging config and see if the car “re-learns” its new theoretical max of 32.
When I’ve charged mine off my 16A charge point (Commando connector), and I switch back to my 32A commando location, the car only does 16A on scheduled charging unless I manually start it once at 32A, then reset back to scheduled - then it remembers 32 automatically for scheduled charging - however it always displays 16/16 until charging actually starts, even on the 32A connected setup.
Thanks - I'll give that a go.
On your wider point, about the car 'learning' what charge rate to use, until this past few days I had never used timed charging as we were on a fixed tariff. I bought the car in January last year so its possible there is some history which could have caused it to default to 16A?
I have the car booked in for 2/2 so plenty of time to experiment, although I expect before then Tesla will cancel and tell me that a software update will cure this.
I have the wallbox as well - my supply to the garage is limited to 30 amp ( old house) and found it would charge at this rate and back off to around 23/24 amps ( approx 5 kW/hour) - this was resolved for a while with a firmware update to the wallbox itself - have you the most up to date firmware on the the charger ( not the car)?
The voltage dip would have to be about below 230v before it would lower the charge rate.
I was trying to remember. I think at 219v mine would just trip!I have seen my Model 3 charging at 32amps despite voltage being reported by the car down as low as 219v.
There is another 'post' within my link which is similar again. It really does look like its the cars onboard charger at fault.. the unplug and plug in is very odd. If you try setting the amps in the car to say 16A before you plug in can you increase the Amps. Or if possible set Wallcharger to 16A (Sorry did not realise it was a brand.) And increase it in smaller increments. Like said in the link the car has 2 16A AC chargers if one is playing up any amps above 16 would require the 2nd charger.Thanks, I thought about that but looking at the Tesla app it shows a good voltage, in fact as high as 244v, but typically around 239v so don't think that's behind the problem I have. Also, because if I just plug in without the timer being set, I get the full fat 32A straight away.
Just to test turn on Sentry Mode from the app (Controls) that will keep car awake. Really surprised if this is because thev car is asleep.Thanks for the further thoughts Cnixon.
I think it's really about the software controlling the charging and in particular about what happens when the car is asleep when the timed charging begins. If the car is awake, like when I pull the plug and reinsert it, then it will draw 32A. If the car is asleep and the charging starts automatically on a timed basis it only takes 16A and the Tesla app shows 16/16, i.e that it is drawing the maximum available. At that point the Wallbox app shows it believes it's delivering, or rather making available, 32A. If I try adjusting the amperage in the car after the timed charging has begun it won't let me go any higher than 16A, but it will let me go down lower. Going up again stops at 16A..
Adjusting the amps on the Wallbox app only has a 'visible effect' in the car/on the Tesla App to the extent the change is 16A or lower - move it above 16A and the car sticks at 16A, move it below 16A then the car/Tesla app shows the lower charge but again caps at 16 when the amps are increased, unless the plug is pulled/replaced.
I have had 'always connect' unticked in an effort to save on vampire drain, but have found my car then takes ages to wake up to connect to the app, or even to wake up when I get in it. It seems that it's getting into a deep sleep and doesn't want to play ball with the timed charges.
I have now re-enabled 'always connect' and will try again and see if that results in a lighter sleep and better charging outcome.
It's a strange one, because the AC-DC charger in the car is 3 phase, so it's default max is 16A/phase.Thanks for the further thoughts Cnixon.
I think it's really about the software controlling the charging and in particular about what happens when the car is asleep when the timed charging begins. If the car is awake, like when I pull the plug and reinsert it, then it will draw 32A. If the car is asleep and the charging starts automatically on a timed basis it only takes 16A and the Tesla app shows 16/16, i.e that it is drawing the maximum available. At that point the Wallbox app shows it believes it's delivering, or rather making available, 32A. If I try adjusting the amperage in the car after the timed charging has begun it won't let me go any higher than 16A, but it will let me go down lower. Going up again stops at 16A..
Adjusting the amps on the Wallbox app only has a 'visible effect' in the car/on the Tesla App to the extent the change is 16A or lower - move it above 16A and the car sticks at 16A, move it below 16A then the car/Tesla app shows the lower charge but again caps at 16 when the amps are increased, unless the plug is pulled/replaced.
I have had 'always connect' unticked in an effort to save on vampire drain, but have found my car then takes ages to wake up to connect to the app, or even to wake up when I get in it. It seems that it's getting into a deep sleep and doesn't want to play ball with the timed charges.
I have now re-enabled 'always connect' and will try again and see if that results in a lighter sleep and better charging outcome.
It's a strange one, because the AC-DC charger in the car is 3 phase, so it's default max is 16A/phase.
So it seems to default to the 16A 3 phase position on the car's screen.
The car does something different when on a 1 phase supply, allowing 32A draw on 1-ph.
It's almost like the car needs 2 settings in the software, a current setting for when on 1-ph and another for when on 3-ph.
Just to test turn on Sentry Mode from the app (Controls) that will keep car awake. Really surprised if this is because thev car is asleep.
with some front-end power switching that allows the connections from the chargers to the L1, L2 and L3 pins on the connector to be routed