Have had my FFE for just over 2 years now. Yesterday was pretty cold here in the Midwest -- was barely above zero F in the morning, around 15 in the afternoon and then actually warmed up a bit to 20 in the late evening. Car was in the garage, fully charged and preconditioned to either 65 or 72 (I forget which one it's set on). While driving, climate control was set to auto and 68F.
- Drive in to work was 11.9 miles. MFM online shows 5.3kWh consumed, so 445Wh/mi. All roads were clear of snow.
- There was a short (1.0 mile there and 1.0 mile back, according to Google Maps) trip to grab something for lunch, that wasn't captured in the MFM online vehicle trip log report for yesterday. So not sure how many Wh/kWh consumed there. Probably high Wh/mi since the car had cooled off and I don't think the cabin heater ever came off the 5kW mark. Assuming 500Wh/mi, let's say 1kWh consumed in those 2 miles.
- Drive to gym at late afternoon, 6.8 miles, MFM online shows 3.0kWh consumed, so 441Wh/mi.
- Drive home in evening, 9.2 miles, MFM online shows .38kWh consumed, so 413Wh/mi.
- Pulled into garage with either 5 or 6 miles remaining. Assuming it was 6 miles left and 400Wh/mi, that would be 2.4kWh usable left in the pack.
That's a grand total of ~30 miles driven in the day, and a total of ~36 miles 'available'. Woof.
Also shows ~15.5kWh available for use in the winter. I know that number is closer to 20kWh in the summer.
Is my math wrong? Should I not rely on the MFM numbers or is it leaving something out? And are other people seeing 35-40 miles usable in wintertime?
I know I can save energy by turning the cabin heat down/off, cranking seat heater up, bundle up with gloves/hat, using just enough defrost to keep the windshield clear, etc. -- I spent the first winter with the car playing that game. But most people aren't willing to voluntarily do that, and I'm less and less willing to do it now. (I knew I'd make it home so I didn't bother yesterday.)