Balance charge graphs

crispyjay · Mar 24, 2025

Managed a 7% to 100% balance charge at the office today.

Some data from Home Assistant for those that like graphs.

HA took some time to connect so missed the first few minutes. Battery seems to get to 90% and then jumps to 100%

MickeySw · Mar 24, 2025

crispyjay said:
HA took some time to connect so missed the first few minutes.

Charging from 7% to 20% takes more than an hour, does it take that long for HA to connect?

crispyjay said:
Managed a 7% to 100% balance charge at the office today.

The MG5 starts balancing the cells every time they reach 100% SoC, what you actually performed was a ‘battery calibration’ charge (followed by balancing).

Did you compare SoH before/after?

crispyjay · Mar 25, 2025

MickeySw said:
Charging from 7% to 20% takes more than an hour, does it take that long for HA to connect?

The MG5 starts balancing the cells every time they reach 100% SoC, what you actually performed was a ‘battery calibration’ charge (followed by balancing).

Did you compare SoH before/after?

No, HA can’t get SoH unfortunately.

MickeySw · Mar 25, 2025

crispyjay said:
No, HA can’t get SoH unfortunately.

You could integrate the charge current over time (coulomb counting) and compare the results from one session to the next?

Balance charge graphs

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