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I'm new: what battery for the kit i want? (Thinking 48v1000w)

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    I'm new: what battery for the kit i want? (Thinking 48v1000w)

    So ive been doing research on getting a conversion kit and buying a li-ion battery to power it,
    I have ultimately decided on a 48v1000w Rear Hub Motor , most likely, but I am unsure what battery to get for it.
    obviously I know it should be a 48v or higher battery, but I get confused when it comes to aH. the description for some 48v1000w kits say to have a battery with at least 48v 11.4aH (or 11.6, cant remember right now). and when I look at the page for say a 48v12aH Li-ion battery it says to not use on 1000w motors.
    anyways, I wanted to get 48v for the speed, but if I have to get a 48v15aH, I was also thinking of going with 36v500w instead (for price).

    Basically just wanting to know if it would be ok to run a 48v1000w hub motor with a 48v12aH Li-ion battery and whether or not its just this(link below) one specific battery that cant be used on 1000w motors?

    Thanks !

    EDIT:
    motor im considering
    https://www.ebay.com/itm/26-Electric...d/142162779717
    Originally considered battery
    https://www.ebay.com/itm/48V-12Ah-Li...38.m2548.l4275

    EDIT2:
    looked deeper on the web for 15aH batteries.. found one on AliExpress for $305
    might just get this to avoid the trouble of worrying about making a 12aH work
    http://bit.ly/2mwIMit
    Last edited by balents; 11-16-2017, 11:05 AM.

    #2
    Look at the max continuous discharge current on both batteries- it's the same. At least the one guy tells you upfront that it won't work with 1kw systems.

    Comment


      #3
      Originally posted by max_volt View Post
      Look at the max continuous discharge current on both batteries- it's the same. At least the one guy tells you upfront that it won't work with 1kw systems.
      I'm still not sure though whether thats a way for them to get you to spend more money on a 15aH or if it actually won't work. Cause i know I've seen and heard of setups with that config of batt+motor (48v1000w with 48v12aH).

      I'll probably end up getting Battery #2 ( http://bit.ly/2mwIMit ) honestly. Unless you're implying that one won't work either?

      Comment


        #4
        A relevant factor in getting a suitable battery is the Maximum Continuous Discharge Current. The battery you pointed to says:
        Maximum Continuous Discharge Current (A) 15
        A 1000 watt motor running at the full 1000 watts and 48V will want approximately (1000/50) = 20 amps. So that battery at 15 amp continuous will be under stress unless the BMS restricts current to 15 amps (unlikely). It will likely work, but your battery won't last that long and you also probably won't get maximum power from the 1000 watt motor.

        Comment


          #5
          Originally posted by Fred View Post
          A relevant factor in getting a suitable battery is the Maximum Continuous Discharge Current. The battery you pointed to says:
          Maximum Continuous Discharge Current (A) 15
          A 1000 watt motor running at the full 1000 watts and 48V will want approximately (1000/50) = 20 amps. So that battery at 15 amp continuous will be under stress unless the BMS restricts current to 15 amps (unlikely). It will likely work, but your battery won't last that long and you also probably won't get maximum power from the 1000 watt motor.
          Okay, ill probably get that one for now until I can afford something that has a cont. discharge of 20 amps. I'll probably end up using the road-legal wire to make it 750w cause I think that's a thing.

          Comment


            #6
            Bump

            Just got paid today, going to purchase the Hub Motor and Battery today.

            These will be my final choices:

            (Motor) https://www.ebay.com/itm/48V-Electri...AAAOSwOA1Z6pk4

            (Batt.) https://www.ebay.com/itm/Electric-Bi...QAAOSwke9Z~orv
            Last edited by balents; 11-22-2017, 08:29 AM.

            Comment


              #7
              Originally posted by balents View Post
              Bump

              Just got paid today, going to purchase the Hub Motor and Battery today.

              These will be my final choices:

              (Motor) https://www.ebay.com/itm/48V-Electri...AAAOSwOA1Z6pk4

              (Batt.) https://www.ebay.com/itm/Electric-Bi...QAAOSwke9Z~orv
              http://electricbike-blog.com/2016/03...ot-get-punked/

              Comment


                #8
                I have to say the v-power batteries don't list the config or cell spec but I have 2 of their products at a good price and they perform as expected.

                Comment


                • balents
                  balents commented
                  Editing a comment
                  thank you, that makes me feel a lot better about having purchased one!

                #9
                I have that rear wheel hub motor with about 100 miles on it. So far so good. I would spend your money on a a good battery. I got mine from Electric Rider.com. They are the Lithium Manganese chemistry and very light. Not cheap, but so far reliable. They come with really nice chargers.
                Robert

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