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  1. J

    how to make an automatic balancer for 2 25.6v pack in serie

    Hello I friend of mine have a autonome home system with inverter, solar and stuff, the system works on 2x 8S 25.2v 200Ah battery in serie for 51.2v nominal It is 2 battery with integrated 8S BMS on each with display. The system ran fine since fall 2023 but last week-end, he came back to me...
  2. J

    Solution for unbalanced small tires 10x3.5x4

    Hello I'm looking for ideas or options that i could have missed. I'm playing around modifying kick scooter with more power and my actual limitation is the tires. Most of them (all of mine) use the small 10inch tire on a 3x4 inch rim. (Black rat or Razor etc) The 10'' size is limiting for...
  3. J

    BionX repurposing matching hall sensors with phases

    Hello All I bought for cheap (50$) a bike with an old bionx (Probably PL250 since it is 24v but i didn't find any tags saying the model.... The guy said it would work with a new battery....It turned out the charger was dead and battery drained itself, I revived the battery for testing purpose...
  4. J

    Can we use extra functions on low cost ebike controllers?

    I opened up few bldc controllers and there is often empty slot on boards for extra wires not connected. Can it be free functions that can be used if i add wires to it? I got 2 replacement controller for my ride, one with a display to add some fun but the other doesn't have wires for a display...
  5. J

    Installed kw vs usable kw from a factory EV

    I was wondering why there was 2 ratings.... What is the use of the extra portion removed ? Is it because the BMS keep some room above and below charging level to extend battery life Is it a safety portion that you can use as a spare tank in case of emergency? The other option with a bit of...
  6. J

    Adding rear hub motors to a fwd gas powered vehicule ?

    I was looking at possible use of hub motors to put in the rear of a front drive thermal car to make some kind of hybrid. Using both energy to take off at a red light, use electric around town and run on gas for the highway. Qs motors seem to have 12kw nominal hub held by a single shaft that...
  7. J

    Configuring Votol em200 controler to work with a small bldc motor

    Hello Story: Last year i moded a brushed 500w PB batteries kick scooter into a lithium bldc ride. I bought a cheap 48v 2000w kit from Vevor. (I think it is same as Kunway.) I made a 14s6p pack of 18650 3Ah 2.5c cells and connected everything to work fine with it including hall sensors...
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