Calculating RBS 6000 Power Consumption

[thewatcher]

Dear Experts,

Using E******* RBS 6000, I measured it's current consumption with Ampere-meter and found out it consumes 18A.


The voltage in this country is 220V AC

So I used the following formula: Watt hours = 18A*220V = 3960 Watt hour

some one told me I need to use 54V instead of 220V

How should I calculate the power consumption?

Thanks