It crossed my mind, but It has to be 24volts so its two of them. would cost More than a gasoline engine. You would still have a range problem even these friction drives drain 20 to 30 amps . Best i can figure you divide the amps of the battery by 8 (they say six but it has not been my experience) to get amp hours. My lawn tractor battery (
[email protected]) 180 amps are about 25 amp hours... range at 30amps would be about 3/4 hour at 10mph. About a 7 mile range. Last time I ran 2 of the motors to get me up the hills. One 20amp and one 30amp motor. It drained in five miles. I was trying to run just elect not much pedal power.
I think running it as one thirty amp or two 20 amp as I have it set up now will help a little. If I do a lot more pedaling, I think it might do a little better still. Actually today I am going to test it one more time with the new large but light weight framed (former) mountain bike. Thought I would see what it would do with just a 30amp motor and a lot of pedal power. It has a larger front drive sprocket and seems to zing along pretty good.
I have one run laid out that pretty much tells me if it has enough juice to run my short errands. One day I might go with a little better battery if I have to replace these. I'm thinking really cheap heavy amp auto battery since I use the trailer anyway. Just hate to chuck the perfectly good 180 amps that I have three off. (Thought for a while I could run 36volter)
M
ore than you ever wanted to know about cheap batteries. If anyone knows more about these things please correct me. What I have learned is mostly trial and error stuff and might be completely wrong.