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  • paxtana
    commented on 's reply
    I would recommend to email support@lunacycle.com attn:seb so we can do further testing

  • MarkS0000
    replied
    Luna - I'm hoping you can help me troubleshoot the capacity on my Wolf battery.

    I've had this battery 18 months and put about 500 miles on it with a BBSHD on a fat bike running a mighty-mini ring. Most of my rides are only 3-4 miles round trip but 3-500 feet of climbing so I keep the battery in the 20-80% range. I've always felt I had to charge too frequently so I but a watt meter on it.

    I have the following battery.
    52-WOLF-GA-13.5-BLK LUNA FUSION: WOLF 52v 13.5AH GA - STEALTH BLACK

    Battery charges to 58.7V
    I had the Watt Meter on it for a longer ride where I used pedal assist and kept the load below 1000w.
    I have a 47.89V reading on the Watt Meter which I calculate to be 35% capacity remaining or 65% used.
    The Watt Meter shows me at .15KWH which I translate to 150 Watt Hours
    I calculate the battery pack capacity at 52V X 13.5A = 702 Watt Hours
    The 150/702 = 21.3%
    The meter shows 3.42 AH consumed which I have as 25% of capacity consumed so not too far off the Watt Hours.

    Based on the Watt Hours, these calculations would tell me that I should have used roughly 2x the watt hours to get to this level of discharge.

    I know these numbers are not exactly precise but this seems like the capacity is too low. I know from experience that from what the display is showing if I run this much more it will hit the LVC and kick off. At this point I'd normally charge the battery back up to 80%.

    If I'm mis-reading the gauge or wrong with some calculations I hope you can point that out or help me determine how to resolve if there is a capacity issue.

    Thank you for the assistance!

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  • MIKEinNC
    replied
    Thanks again, paxtana.
    The other two wires were red and black, and they tested out as + and - as expected.

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  • paxtana
    commented on 's reply
    I doubt it goes to anything but I suppose I could be wrong. Just make sure you use a multimeter to get the polarity right for positive and negative and it should operate the same as when it had the other plug on it. You can't really get a three-pin mini XLR plug with only two wires in the cable so it probably just came like that.
    Last edited by paxtana; 3 days ago.

  • MIKEinNC
    replied
    Thanks, Paxtana .
    Just out of curiosity, what is the function of the yellow wire in the basic charger cord ?
    Is it feeding back some sort of state of charge info from the battery, that my Luna smart chargers calculate without a third wire ?
    When I use it, do I need to be more careful to unplug the charger immediately, once the battery is charged ?

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  • paxtana
    commented on 's reply
    Yes if you cut off the end you can put XT60 on it

  • MIKEinNC
    replied
    I recently purchased a 52v basic charger, as part of a BBSHD kit.
    Unfortunately, it has a 3 prong barrel connector, rather than the XT60 connector I need to charge my Mighty Mini, or Wolf battery.
    Do you have an adapter or, if I cut the barrel connector off, will I be able to splice two of the wires to an XT60 pigtail ?

    Leave a comment:


  • 73Eldo
    commented on 's reply
    A restive load (something that is basically a heater) is different than most other loads. Most loads as the voltage goes up the amps or watts needed goes down. Resistors work the other way, more voltage means more amps or watts. That is why your soldering iron that was rated 30watts and 230 didn't do much if you were running it at only around 1/4 of its voltage. I don't know if the heater would be a good idea without the fan. You won't be running it at full power but it may still need the fan to be happy. Can you still buy halogen lamps there? Maybe on the used market? I'm sure just like here they used to be very common as portable work lights and for outdoor use. Made lots of heat and used lots of power so most people are now using LED's but that is what we want in this case.

  • Cezar
    commented on 's reply
    Thanks for the answer.
    I live in Europe - we have 230V voltage here.
    I tried to connect a soldering iron about 30W - normally working on 230V AC. After an hour, it was barely warm, but low power and the voltage drop was very slow. I need discharging in order to properly store the battery in winter - I wanted to charge it and discharge it once a month. And what would happen if I connected a small electric heater to heat the air about 1kW - without a fan?
    Last edited by Cezar; 5 days ago.

  • Cezar
    commented on 's reply
    Thanks for the answer.
    I have an ordinary old electric heater (not digital) and a toaster - I will try to discharge the battery with them.
    Last edited by Cezar; 5 days ago.

  • 73Eldo
    replied
    Just happened to be online looking at Home Depot and this is still a stock item at my local store. $10 and you are almost done. Cut the regular plug off the end and splice on the pigtails for your battery and you should be set. Quick math in my head (which could be wrong) is you would be getting around 60 watt load at 48v so not gonna suck the juice as fast as a nice pedal assist on flat ground but will still get the job done. I'm sure they have a $10 volt meter you could buy too and splice in with your pigtail so you can see whats going on.

    https://www.homedepot.com/p/HDX-250-...5669/300453898

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  • 73Eldo
    replied
    A light bulb if you can still find one would be the easiest way I can think of for most people. Everything else can be a lot harder to understand what sort of load it will be and how to safely mount it and such. At least a light bulb you know is rated for 120v and isn't hard to come up with a mount and connect. A 60w won't get that hot but will take some time to really make a dent in the charge. If you want to discharge it fairly quickly try and find one of those old school 500w halogen work lights. You know the kind that use the long narrow bulb and were good at creating a lot of heat and starting anything they touched on fire. Wait did you want safe?

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  • paxtana
    replied
    Cezar Here is a graphic I made for a testing video which goes over some options. This was on a video using a brake resistor as the discharger.

    Last edited by paxtana; 5 days ago.

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  • Cezar
    replied
    Hello all,
    I am looking for a way - how to discharge the battery safely at home, not by bike - at least a few volts ..

    Leave a comment:


  • paxtana
    commented on 's reply
    If you are attempting to use it without the spacers for the front wheel then I would say that is probably the cause of the issue. See the pic on this page and check if you added those. Last I checked they would usually be ziptied to the bike

    https://electricbike.com/forum/forum...bike#post93790
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