It is known that the output voltage of the charger is 41.9 V and the charging current is 1.8 A. Calculate the power consumption in two steps:
1. Calculate DC power consumption. 41.9x1.8=75.42 (Watts)
2. Calculate AC power consumption. The charger converts AC to DC and the conversion efficiency is 60-70%. Here 60% is taken into account. The power consumption in one hour is: 75.42 (watts) x 1 (hours) divided by 60% = 125.7 (watt). hours), which is equivalent to 0.1257. One kilowatt hour is equivalent to what used to be called 0.1257 kilowatt hours of electricity.
Conclusion. Power consumption is approximately 0.1257 kWh per hour.