During a typical charging period - 02:00-05:00 - I see on the Cloud portal that 'grid import' is -3.072 kW, 'battery charge' is -2.841 kW and 'load power' is 103W. This implies that 4% of imported energy is lost in conversion from AC to stored energy.
Is this level of efficiency expected? What efficiency is expected during discharge to the grid?
Thanks in advance
SirDoug
SirDoug This implies that 4% of imported energy is lost in conversion from AC to stored energy.
Is this level of efficiency expected? What efficiency is expected during discharge to the grid?
4% is quite good charging efficiency if the figures are correct.
Other people have measured round trip efficiency and its between 10-20% losses on conversion in and out of the battery and to power the inverter.
I personally assume about 15% overall
geoffreycoan 4% is quite good charging efficiency if the figures are correct.
If its the portal then it excludes charge/discharge losses. The 4% is the chemical losses in the battery.
Low voltage batteries incur greater conversion losses than the high voltage batteries (AIO basically).
Edit - low voltage battery max charge/discharge then 7.5% each way but more if its exported.