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  1. AaronColby

    Heyo (Daly) 4S 12v Smart BMS - Intermittently turning off 'Discharge MOS'

    To elaborate further, the situation got much worse over the next few days and the system was turning off every 30 minutes or so and everytime on heavy load. I loaded up the BT app and watched as the voltage reading from cell 1 would drop REALLY low, sometimes it would slowly drop until the low...
  2. AaronColby

    Heyo (Daly) 4S 12v Smart BMS - Intermittently turning off 'Discharge MOS'

    Pulled everything apart and found a very slightly loose negative voltage lead wire to terminal one. Tightening that up has solved all the problems. Talked to my friend who does solar installations and he had a similar issue with loosening nuts causing bad voltage readings. May want to use...
  3. AaronColby

    Heyo (Daly) 4S 12v Smart BMS - Intermittently turning off 'Discharge MOS'

    I have a Heyo F4S12V150A BT (did not realize it was a Daly knock-off at time of purchase) connected to my 278ah LFP battery pack (4x 3.2v cells in series). Despite some set backs at the beginning (read below, might help with your problem) I've got it working. It has been running for a week in...
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