OK... Cold REALLY affects DCFC.
I’m only in San Francisco cold. So overnight cold soaks in the 40’s.
When I DCFC the charge rate follows pretty much a bell shaped curve. Slow to start, fast in the middle, slow at the end. But on a warm day with warm battery, I start with maximum charge rate.
Today, the car cold soaked all night at 48’F or 49’F.
I drove it ~30 minutes on the freeway, which warmed up the cabin, and you would think, the use, would warm up the battery.
It’s now 52’F outside. I’m thinking my HV battery pack is at least this warm, probably warmer from the 30 minute drive.
On a 50kw DCFC just now (which delivers 46 kw to the car on a warm day), the car is only taking 32 kw.
DCFC rate is reduced by 30% with temperatures in the 50’s. Which turned out to be 15 kWh hours, or 25% charge in 30 minutes on the fastest DCFC available. (16% to 41% in my case)
As the battery warmed up, the charge rate gradually ramped up.