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  1. J

    Replacement BMS not playing nice

    I just went and did some voltage measurements, this pack says it is charging at 84v 1. Power off disconnected from charger 0 Volts (Good!) 2. Power on disconnected from charger 5 Volts 3. Power off connected to charger approx 35 Volts 4. Power on connected to charger approx 44 Volts I'm...
  2. J

    Replacement BMS not playing nice

    Hi All, Thanks for your replies, I'll check Comrade and docw009 suggestions, amberwolf my son was riding it home (we live on top of a steep hill) and when he got home the battery was smoking, pulled the BMS apart and it looked like the mosfets had melted/caught fire, here's an image
  3. J

    Replacement BMS not playing nice

    Hi All, I burnt out the BMS of my 72v20AH battery, bought an identical replacement from the manufacturer, and carefully replaced it, the 20S wires were easy as they were just two plugs of 10 each, and all other wires were like for like. Now the battery will charge but not turn on when...
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