teslarati97
Well-Known Member
For those who are contemplating battery preconditioning, my DCFC results are:
At -5F: 74 minutes charging with peak 20 to 21kW (~5 min climatization and 20 min driving)
At 32F: 30 minutes charging with peak 80kW (20 min of driving) or 27 minutes from 48% to 80%.
Both did not utilize battery preconditioning, but after 8 minutes of DCFC at 32F, the charging rate jumped up from 33kW to 80kW around 58% SoC. While I don't know the exact consumption for preconditioning, I'm going to ballpark 4kWh. So that kind of brings the question on when you should battery precondition. If it's 32F or warmer, skip the preconditioning because you are trading off extra charging time for charging speed. Let's say it was 80kW, then it would take you 3 extra minutes to recoup the preconditioning (4kWh).
32F with preconditioning (estimate): 42-80% SoC would take about 26.8 minutes (6% SoC loss) plus extra $ for the 4kWh
32F without preconditioning: 48-80% SoC would take about 27 minutes
Should you battery precondition the U25 at 32F and warmer? Maybe not if $/kWh, but consider for $/min...and absolutely at -5F!
At -5F: 74 minutes charging with peak 20 to 21kW (~5 min climatization and 20 min driving)
At 32F: 30 minutes charging with peak 80kW (20 min of driving) or 27 minutes from 48% to 80%.
Both did not utilize battery preconditioning, but after 8 minutes of DCFC at 32F, the charging rate jumped up from 33kW to 80kW around 58% SoC. While I don't know the exact consumption for preconditioning, I'm going to ballpark 4kWh. So that kind of brings the question on when you should battery precondition. If it's 32F or warmer, skip the preconditioning because you are trading off extra charging time for charging speed. Let's say it was 80kW, then it would take you 3 extra minutes to recoup the preconditioning (4kWh).
32F with preconditioning (estimate): 42-80% SoC would take about 26.8 minutes (6% SoC loss) plus extra $ for the 4kWh
32F without preconditioning: 48-80% SoC would take about 27 minutes
Should you battery precondition the U25 at 32F and warmer? Maybe not if $/kWh, but consider for $/min...and absolutely at -5F!