AC Charging Speed / Efficiency

[Negue]

i-Miev charge at 230V 16A EVSE.

Start at 20% SoC (~2.2kwh) at 2°C , charging at 2.5kwh
+~3h
~80% SoC (~9kwh) at 10°C charging at 1kwh

OBDzero says that I charged ~7kwh , and official counter electric supply equipment says ~9kwh.
And with each hour in 1kwh charge time efficiency will drop lower.

Can we improve somehow AC charging speed ?

When I will upgrade to ~40kwh , 80% will be ~32kwh and for rest of 6-8kwh I will need to 8h :/

 

[Negue]

 

[MickeyS70]

Can we improve somehow AC charging speed ?

The stock OBC is limited to around 3.7kWh (AC). Best efficiency is achieved when your EVSE is supplying the full 16A.

Once a cell gets close to 4.1V, the charge rate drops to avoid ‘overshooting’, therefore having a well balanced pack is important.

If you want to achieve even higher AC rates, you would need to replace the OBC altogether.