pictsidhe
Well-Known Member
Yesterday actually.
I had a good opportunity to test regenerative braking efficiency. Pilot mountain.
Driving to the foot of the mountain, I managed 3.8 mi/kWh. Just before it gets steep, I reset the trip meter. The next 2 miles were pretty bad, 1.2mi/kWh!
Speed was 20-25. I didn't touch the stop pedal.
Back at the bottom, a pic of the trip meter, average is a lot better, but not as good as if I'd driven 20-25 on a flat road. I never drive that slowly normally, but maybe it would have been around 6mi/kWh? I calculate I regenerated 0.75kWh into the battery. At 6kWh on a flat road, I'd have used about 0.25kWh less for those 4 miles. So regen efficiency of 75%. Not too bad.
Last tripmeter pic at the supermarket near where I live. My phone died before I got home, but the average had not changed.
Temps were in the 50s. Brakes not used. Driving up was 27 miles. I used 39% of my battery for the ~56mile drive. Not bad for a cool day on all weather tyres.
I calculate that at an efficiency of 90%, 20,000' climb is 100% battery usage. That is on top of normal driving usage. So if your route is 70miles and 5,000 climb. You'll use about 50% of the battery for 70 flat miles, and 25% for the climb.
I had a good opportunity to test regenerative braking efficiency. Pilot mountain.
Driving to the foot of the mountain, I managed 3.8 mi/kWh. Just before it gets steep, I reset the trip meter. The next 2 miles were pretty bad, 1.2mi/kWh!
Speed was 20-25. I didn't touch the stop pedal.
Back at the bottom, a pic of the trip meter, average is a lot better, but not as good as if I'd driven 20-25 on a flat road. I never drive that slowly normally, but maybe it would have been around 6mi/kWh? I calculate I regenerated 0.75kWh into the battery. At 6kWh on a flat road, I'd have used about 0.25kWh less for those 4 miles. So regen efficiency of 75%. Not too bad.
Last tripmeter pic at the supermarket near where I live. My phone died before I got home, but the average had not changed.
Temps were in the 50s. Brakes not used. Driving up was 27 miles. I used 39% of my battery for the ~56mile drive. Not bad for a cool day on all weather tyres.
I calculate that at an efficiency of 90%, 20,000' climb is 100% battery usage. That is on top of normal driving usage. So if your route is 70miles and 5,000 climb. You'll use about 50% of the battery for 70 flat miles, and 25% for the climb.
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