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  1. #1
    Junior Member rick kimura's Avatar
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    Question 200w motor + 36v vs 48v lithium battery

    My first thread here and have a question in regards the differences using 2 li ion batteries . With all riding conditions being equal , would a 48v 12ah li ion battery on a 200w motor travel the same distance as a 36v 9ah before running out of steam ?
    The 48v with the 200w obviously , would make it go faster , but my thoughts are with the distance . So 2 identical 200w bikes side by side on a flat surface going full throttle ,,which would stop first ? The 12ah (bigger fuel tank) would have the advantage over the 9ah , but would the faster 48v get you the same distance , or just use more fuel than its smaller competitor ?
    Ive had a 36v and just bought a 48v as I need that bit more distance , the extra speed wouldn't hurt either . My controller is compatible with a 48v . Im not too fussed about going too fast as its a beach cruiser and not a stealth bike , though the extra distance would be a bonus . I found out ,,,its a bit late now , but if I had gone with a 36v (15ah more distance) , I probably would have been better off . However I did get a good deal on the lithium li ion battery .
    thanks ,,,rick kimura

  2. #2
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    Look at the simulator on ebikesca and you'll receive a quantitative evaluation of your situation; otherwise it's just a guess. However, since you have about 78% more w/h with the bigger battery, you will be able to go faster and further. On a clear, warm, windless day, throttle only and flat road, a 150 pound rider on a 50 pound bike (THIS IS JUST AN ESTIMATE, SO PLEASE PUT IN THE EXACT FIGURE IF YOU LOOK IT UP) will use 22 - 28 w/h per mile; this about doubles at 30 mph.
    Last edited by 2old; 03-22-15 at 02:55 PM.

  3. #3
    Junior Member rick kimura's Avatar
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    Quote Originally Posted by 2old View Post
    Look at the simulator on ebikesca and you'll receive a quantitative evaluation of your situation; otherwise it's just a guess. However, since you have about 78% more w/h with the bigger battery, you will be able to go faster and further. On a clear, warm, windless day, throttle only and flat road, a 150 pound rider on a 50 pound bike (THIS IS JUST AN ESTIMATE, SO PLEASE PUT IN THE EXACT FIGURE IF YOU LOOK IT UP) will use 22 - 28 w/h per mile; this about doubles at 30 mph.
    2old , that is a great improvement , and just what I wanted to hear . Where I live is all flat for approx a 35 mile radius with a beach stretch of 30 mile . The cost of fuel here is criminal so with this distance coverage I can just polish the car and look at it . By the way , this is what I bought ,,Newest 48V 12AH Li ion Battery 10AH Battery with Aluminum Case Use 500W Motor | eBay

    thks rick

  4. #4
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    Rick, good luck, you got a great deal. Look at the simulator since it will tell you where your system is operating at maximum efficiency.

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