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    Originally posted by BK Xray View Post
    Go to Knowledge base and look under batteries. One post starts with "52 volt..." and it has a chart.
    Click image for larger version

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    • paxtana
      paxtana commented
      Editing a comment
      That chart is for 48, not 52

    Here is a chart I like a little better...but just because it has a higher voltage at 100%, that doesn't mean you should go there very often. Charging to 4.1 volts per cell or about 90% and not discharging below 25% will help your battery last longer. Charge to 40%-50% for storage or when you don't plan to ride for a while.

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      Battery question for you experts. I have 2 lunas with 52v wolf batteries. Old one works great after 2 years of hard riding. Still gets to 58.7 charge when full though we typically limit it to 80%. The new one won’t charge anywhere near full even after careful new battery conditioning- draw down, charge to 100%. It’s 1 month old with 250-300 miles on it. Never drawn down below cutoff, of course. It hasn’t registered above 55v. Thoughts? I really need the range.
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      Pic of charger for previous post.
      Attached Files

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        I've got the bbhd mid drive on my cargo bike. The bike weighs about 80 pounds. And ive got two kids, 50 pounds and myself, about 200. So a total weight of approximately 350 pounds. I live in PGH, so ideally, I can ride on flat roads/trails without any assist.
        id like to get a battery to power the vehicle up the hills. I DO NOT want speed. I just need "a little" assist for the road to my house.
        I had a battery from a lesser company, out of last Vegas, I believe. I can't recall the company name, but I believe it was a 52v /14aH "shark", of some sort.
        Well, the battery bit the dust. But I do remember on the level 1 assist, I was comfortably riding the bike up hill, at around 7 miles an hour. I am totally comfortable with that.
        Do I really need to spend $800 on a battery to get me where I need to be?
        And when will the $600-ish batteries at Luna be back in stock?

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        I guess my follow up question is:
        You wouldn't necessarily recommend a "larger" battery, one with more aH, due to the size/weight of my vehicle?

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        • HIGHVOLTAGE
          HIGHVOLTAGE commented
          Editing a comment
          Well it depends how far you want to go. You won't need to go larger if you can get by on 13.5ah. The Wolf has about a rough 30mile range rating. So if you're doing a lot of hills, it may be more like 15-20miles. Not sure how far you're going but if it's within that, you'll be fine.

        Thanks for the heads up! I dont think I'll need bigger since that sounds like a long ride with so much weight. Does it make sense to keep the motor in "idle", or something, when not using it? Would that hurt anything to only turn on when needed, during a ride?

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        • paxtana
          paxtana commented
          Editing a comment
          The system draws very little power if you are not using the motor

        Hey new here!
        I noticed that my pedal or bottom bracket started to creak and there is also a noticeable "bump" or "notch" in the rotation. The bump is always in the 8o clock position on the left crank arm. Where do i begin to trouble shoot this?

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        • paxtana
          paxtana commented
          Editing a comment
          What kit is it

        I hear creaky cranks on left when pedaling
        at the top of the stroke,guessing no clips or straps

        Were your cranks properly installed and re-tightened after first ride?

        You can start a bar fight with the 'lube or don't lube the spindle' topic I lube but they do have to be tuned/tightened properly
        Article by Jobst Brandt about installing square-taper bicycle cranks

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          I always put a very light coat of grease on both the spindles and pedal threads before tightening. I would make sure that the crank arm and pedal are both well tightened. One thing to try if that doesn’t fix the problem is swap in a different left pedal to see if the noise could be pedal related.

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            Just got and installed a BBS02 with a 52 volt battery. I've noticed that the PAS gives me acceleration for about 2 seconds and then the motor cuts out. But when I use the throttle I attain a higher speed. For example, if I am at speed setting 3 (out of 5) and am in cassete gear 5 (out of 9 - in the middle ring), the throttle will accelerate the bike for about 2 seconds and I will attain a speed of 15 mph, and no higher, but (at the same settings) when I use the throttle, I will get to around 20 mph. So my question is, is that how it's supposed to work? Also, the bike is harder to pedal when there's no assist - there's resistance to my pedaling once the PAS has cut out. Should there be restance in the bottom bracket if the power is not on? - Thanks - Gary

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            So I purchased the HD mid drive a couple years ago. No complaints. But I believe I got the hot rod edition (?) How does that affect the system overall, versus a "normal" hd motor? I was curious since my first battery didn't work very long and I'm looking to buy a new battery for my cargo bike (350-400lbs total for rider, bike and cargo).

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            • HIGHVOLTAGE
              HIGHVOLTAGE commented
              Editing a comment
              Should be fine with the Hot Rod. The motor can definitely handle it and more :) Your battery longevity is a whole other subject though and usually doesn't have much to do with the motor. There's a really good guide written up on how to store and use lithium batteries properly on our knowledge base. I recommend taking a look at it for sure

              When batteries are made at the factory the cells are spot welded into parallel groups and series. A battery management System is then soldered to each parallel group. For example a 52 volt 11.5ah or 13.5ah Shark pack will have 56 cells and the packs is called a 14s 4p. When charging the Battery Management System (BMS)

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              I am having one issue I'm running a 2 kilowatt system my speed controller does not have a heads-up display or a programming chip but it does however have a factory soft start is there any way to reset the controller or bypass the soft start so I can have all the power in the throttle response at once and if so how

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                Hi,
                I just greased the main steel gear on one of my BBSHDs and there was no gasket. Is there supposed to be one of these? https://lunacycle.com/parts/bafang-p...el-gear-bbshd/
                Or are the machined surfaces flat enough to keep a good seal?

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                • paxtana
                  paxtana commented
                  Editing a comment
                  Bbshd usually has a paper gasket there. if you have had the motor for a while I suppose it might be possible that the gasket degraded over time, or it just ripped apart when you removed the cover. They tend to do that.

                  You could probably use gasket compound around the edges if you had to
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