Post BMS Update - data anomolies

4 comments started 2023-05-07 last 2023-05-08
GivEnergy ProductsHybridBattery
4
#1 4monks

Hyb 5 Gen 2, 2 x 9.5. I applied the update and let it run overnight. Everything appeared ok. The drain from about 30% SOC went fine and the charge back to 100% seemed to go well also. I received all the Start/end firmware notifications and start/end calibrations notifications - everything looked to be running ok.

However when I dig a little deeper, there are a few mismatches in the data:

1) The Mobile App reports 100% SOC (overall), but when I drill into the batteries in the app, the primary reports 1% SOC and the secondary reports 100%. This is also the same via GivTCP - 100% inverter SOC, batteries at 1% and 100%. The portal report overall SOC as 100%

2) The inverter remaining charge is reported as 9.5kWh at the inverter (should be twice that), but in GivTCP the battery individual voltages are both reported >53v and battery remaining capacity > 195Ah in each battery.

I restarted the inverter just to be sure and GivTCP but the discrepancies remain.

Any ideas? Is BMS doing some sort of cell balancing? The calibration finished about an hour ago.

Invertor ED2248G186

4
#2 4monks

And now it is reporting correctly.... 100% overall, primary 99% and other 100%. I guess it was BMS doing it's thing.

#3 TheDragon (GivEnergy)

BMS has had one heck of a shake up. If it errors, it takes itself off for a chat in the corner of the room. It comes back after a while all fresh and ready.

The new BMS can take the pack offline if it needs to, such as a fault, leaving you one pack down. But better than previous it drops the lot.
Now they can go offline to have a think about how naughty they have been. Or more serious if one is charging faster and they are way out of balance, they can detach and cool off, let the other catch up

This behaviour is designed into the BMS.