A lot has been written, assumed, wrongly (and rightly) measured and interpreted about the efficiency of the charger. The biggest problem has always been that the big capacitors in the the charger filter section create a fairly large phase shift (phi) so real power is not the same as RMS voltage times current. This is not inefficiency. It’s, at most, ineffectiveness.
I have been in contact with an Italian professor in Power Electronics and he has put an R110 on some serious lab equipment. The results are as follows
|Set point current (A)||Power battery (W) *)||Power AC (W)||Current AC (A)||Power efficiency (%)|
*) Battery power (DC) was derived from CanZE, voltage times current
Conclusion: If charging at a 16A setpoint (single phase), the efficiency is only a few percents lower than the highest measured. 85.5% is nothing to write home about but not bad. 80.7% at 16A is surely not as bad as some people would like you to believe.
I hope to get my hands on some 3 phase measurement. There is reason to believe the efficiency could be better, as there is a lot less curve following to do.