striider
100 W
Ok, I am into this full force now, and am considering another battery already for various reasons (ebike trip with the wife coming up and her battery is in the ocean somewhere still, spare, occasional longer range for my bike, etc) and would like some advice. I am trying to determine if I should buy another of the exact same battery so I can use it in pannier packs occasionally.
My current pack was $388 to my door from China and here are the specs:
According to Dogman's formula I found in another post and my recent logs, I don't think I am getting 20AH of juice out of this thing.
I am averaging 27Wh/mile real world around here with winds and hills and such.
48v x 20Ah = 960 Wh
960/27 = 35.55 miles theoretical range
I rode my bike the other day on this route to test range: https://goo.gl/TsBemP 26.2 miles at 15.72 avg mph (100 minutes)
I don't have my Wh figure for the ride because my watt meter faded away and lost my stats
I was taking it semi-easy on the battery by pedaling and keeping it under 20mph for most of the time. There were LOTS of people on Cherry Creek trail the whole way so lots of slowing and accelerating involved. Toward the end I was close to empty, so I upped my speed for the last couple of miles as I wanted to hit LVC. My LCD showed battery empty for a mile or two and it turned out to be correct and I hit LVC as I turned into the neighborhood and had to peddle 100% the last 3/4 of a mile or so.
So either my consumption was much higher on this particular ride, which I doubt since I usually am hauling along much faster at 27 Wh/mile, or this battery is not a true 20AH, right?
My current pack was $388 to my door from China and here are the specs:
According to Dogman's formula I found in another post and my recent logs, I don't think I am getting 20AH of juice out of this thing.
I am averaging 27Wh/mile real world around here with winds and hills and such.
48v x 20Ah = 960 Wh
960/27 = 35.55 miles theoretical range
I rode my bike the other day on this route to test range: https://goo.gl/TsBemP 26.2 miles at 15.72 avg mph (100 minutes)
I don't have my Wh figure for the ride because my watt meter faded away and lost my stats
I was taking it semi-easy on the battery by pedaling and keeping it under 20mph for most of the time. There were LOTS of people on Cherry Creek trail the whole way so lots of slowing and accelerating involved. Toward the end I was close to empty, so I upped my speed for the last couple of miles as I wanted to hit LVC. My LCD showed battery empty for a mile or two and it turned out to be correct and I hit LVC as I turned into the neighborhood and had to peddle 100% the last 3/4 of a mile or so.
So either my consumption was much higher on this particular ride, which I doubt since I usually am hauling along much faster at 27 Wh/mile, or this battery is not a true 20AH, right?