Quote:
Originally Posted by oldtamiyaphile
The EM calculator tells me that equates to 710Wh/km.
|
Jack Rickard is getting 750 - 1100 w-h per mile in a 7777 lb cadillac escallade running DC motors and an automatic transmission. In my opinion, your van should do quite a bit better than 710.
Based on 3800 lbs a decent conversion should get you 380 w-h per mile. A bad conversion maybe 450 w-h per mile. A Great conversion 350 w-h per mile. Do you run cargo or towing a lot? If not, I would not put the extra weight into your nominal calculations.
With low-speed driving and hyper-miling, running an AC system and using regen to stop at lights (when coasting in traffic just won't cut it) I'll bet you could beat 350 w-h per mile.
Quote:
|
I want to travel 100km on a charge so I need a 71kWh pack. This is at odds with the EV source calculator which predicts a nearly 60 mile range on a 28.8kWh pack. They don't factor in that I drive all low speed streets and would be hypermiling, I expect I would see a healthy 80miles on such a pack.
|
100 miles with a margin for error, and using some heat, and maybe power steering and brakes ... 400 w-h per mile ... 10% margin for error or if you want to charge to 95% and discharge to 10% (in an emergency case) .. 45 kw-h would be my guess.
Quote:
|
My van has a good amount of space under the floor so all the batteries would be mounted below my CG, improving ride and handling (maybe!).
|
If you have the room, centering the mass of the batteries at the centerline of the wheels is supposed to affect the handling of the vehicle the least. This is what I read of Teslas and such. I have no experience with having lots of room for batteries
Quote:
|
How would I more accurately predict my required capacity based on my current diesel usage?
|
That's an excellent question that I've never read before. There are a few things you use fuel for when stopped that electrics don't, like idling .. but there are things you get for free, like heat, that electric uses energy for. I would think there are too many variables to get a decent converted number.