I charge at home using the UMC connected to a 32A/240V supply. I've had my MS since March 2016 (pre-facelift S70 built ~December 2015) and the car has consistently charged overnight at an average of ~7.4 kW (32A x ~230V). On 14th Jan the average overnight rate was only 5.4 kW and I noticed the app (and car console) only indicated 24A available. This is the first time I've noted a reduced average overnight charging rate at home.
It was below freezing (about -1 Celcius / 30F) on the 14th, for the first time in a few weeks. However I noted the charge rate behaviour on 21st November when it was slightly colder (about -3C), and in that case although it took 10 minutes to reach full power (while I presume the battery was heated up) the available current was always the full 32A (see pictures below).
I noticed a couple of other UK owners commenting that their home charge rates had dropped in the last week or two and speculated that current supply limiting is a new feature triggered by a software update? Has anyone else seen any change in behaviour in recent weeks?
Screenshots
Behaviour in November, temperature ~ -3 Celcius. Charge rate ramped up from 0 to 7.4 kW over 10 minutes. Available current shown as 32A throughout. First pic 5 minutes after charging started (12A) , second pic after 10 minutes (32A).
Behaviour in January, temperature ~ -1 Celcius. Available current only 24A (overnight power averaged 5.4 kW).
It was below freezing (about -1 Celcius / 30F) on the 14th, for the first time in a few weeks. However I noted the charge rate behaviour on 21st November when it was slightly colder (about -3C), and in that case although it took 10 minutes to reach full power (while I presume the battery was heated up) the available current was always the full 32A (see pictures below).
I noticed a couple of other UK owners commenting that their home charge rates had dropped in the last week or two and speculated that current supply limiting is a new feature triggered by a software update? Has anyone else seen any change in behaviour in recent weeks?
Screenshots
Behaviour in November, temperature ~ -3 Celcius. Charge rate ramped up from 0 to 7.4 kW over 10 minutes. Available current shown as 32A throughout. First pic 5 minutes after charging started (12A) , second pic after 10 minutes (32A).
Behaviour in January, temperature ~ -1 Celcius. Available current only 24A (overnight power averaged 5.4 kW).