Guru
Joined: 13/10/2014
Location: AustraliaPosts: 2232
| Posted: 06:13am 18 Jan 2024 |
DALY 200A BMS trap: Found during testing:
Mentioned previously:
DALY have various BMS Microprocessor platforms, which one you get depends on the options available when ordering, OR make sure it has the ST103 chip set.
There is a full Alarm list screen on the PC software, which IMHO is really important when setting up a BMS and finding out what unexpected event triggered the Charge MOS or Discharge MOS to switch off, this list is only available on a BMS with CAN/RS485 option, which is the ST103 Chip Set.
New Problem I found:
My three 200A BMS units give no indication or alarm if Charge "Over Current" trips the charge MOS.
Now the Current sensor in the DALY occasionally dances around because of HF Inverter noise and/or Solar charger noise, even thought the current may be showing somewhat correctly, its ADC output can spike because of noise and cause a false over current trip.
There is no intelligence in the Firmware, the Charge MOS is instantly disabled - no Alarm info and no indication of the cause of the MOS switch off. Just one to watch out for, I've had to do a restart of the BMS to get the MOS to switch back on sometimes after this event.
If this type of thing happened once in a blue moon you would be pulling your hair out wondering why. Don't know if it's the newer firmware or it other models do this.