Over the past few weeks there have been mixed reports from owners of older 85kWh Model S cars – some of whom are reporting significantly reduced supercharging rates, while others have experienced no noticeable reduction. The Tesla Owners club of Western Australia has been able to definitively resolve this issue thanks to the fantastic efforts of Rob Dean, owner of a 2015 SP85D.
(Sourced from TOCWA's forum here: 85kWh Model S reduced Supercharging rate reduction confirmed by TOCWA)
Before the charging test commenced, Rob’s car was indicating there were two software updates ready to be installed. The first test was undertaken with software version 2019.16.1.1. After this test was completed, Rob updated his car’s software to 2019.24.1 and then drove several hundred kilometres to run his battery back down to 20% and immediately repeated the test at the same Supercharger stall. The air temperature remained even from 15°C to about 18°C over the duration of the two tests.
Both tests checked Supercharging rates from 20% to 70% with screen captures taken at 10% intervals. The following images show the before and after results:
While there is a substantial reduction in Supercharging rate with the latest software version, an important metric to note is that 20%-70% charging took 29 minutes with the older software and 36 minutes with the latest software – a mere 7 minute difference.
(Sourced from TOCWA's forum here: 85kWh Model S reduced Supercharging rate reduction confirmed by TOCWA)
Before the charging test commenced, Rob’s car was indicating there were two software updates ready to be installed. The first test was undertaken with software version 2019.16.1.1. After this test was completed, Rob updated his car’s software to 2019.24.1 and then drove several hundred kilometres to run his battery back down to 20% and immediately repeated the test at the same Supercharger stall. The air temperature remained even from 15°C to about 18°C over the duration of the two tests.
Both tests checked Supercharging rates from 20% to 70% with screen captures taken at 10% intervals. The following images show the before and after results:
While there is a substantial reduction in Supercharging rate with the latest software version, an important metric to note is that 20%-70% charging took 29 minutes with the older software and 36 minutes with the latest software – a mere 7 minute difference.