JK BMS CPU AUX anomaly

[pardeep]

I have JK BMS 8s with 2 amps active balance, it shows no errors when charging with epever solar charge controller even at 30 amp but start to show error CPU AUX anomaly when charge with PowMr all in one inverter solar grid charge controller even at 10 amps (same solar panels cause the problem when battery is charged with this stupid cheap inverter). HankzorBMS and PowMr aliexpress stores were not helpful at all. Has anyone came across this and how did they fix it? thanks

 

[sunshine_eggo]

Have you gone back to the EPEVER to confirm the lack of error after using the PowMr?

https://diysolarforum.com/threads/jk-4s-bms-brand-new-with-errors.40868/ ??

 

[pardeep]

Have you gone back to the EPEVER to confirm the lack of error after using the PowMr?

https://diysolarforum.com/threads/jk-4s-bms-brand-new-with-errors.40868/ ??

Thanks, Yes, I have gone back to EPEVER to confirm, it charges the battery without any error on BMS up to 30 amps @24V. The HankzorBMS has informed me that this BMS model does not support any link to inverter charger so causing the problem, they will release new products in August that will support the link between BMS and inverter chargers. Still can not understand hoe BMS detect that charge voltage and current is coming from EPEVER or Inverter charger. I tried even disconnecting AC side of PowMr inverter to see if some AC current or noise is making any difference, but still get CPU AUX anomaly error message.

 

[sunshine_eggo]

It seems they're implying the BMS can't communicate with the inverter. Have you attempted to connect the two for communication?

 

[DIYrich]

Do You have a temp sensor you can attach?

 

[pardeep]

It seems they're implying the BMS can't communicate with the inverter. Have you attempted to connect the two for communication?

It looks like it also gives AC current output not pure DC current, this may be the reason BMS is disconnecting, anyway, I have disconnected this inverter and apply for refund.

 

[sunshine_eggo]

It looks like it also gives AC current output not pure DC current, this may be the reason BMS is disconnecting, anyway, I have disconnected this inverter and apply for refund.

Clamp ammeters must be set to the appropriate mode before use. You have your clamp set for AC amps on a DC circuit. The indicated result is garbage.

Measuring a value for AC current on a DC circuit does not indicate a faulty system. It indicates a faulty operator.