Powerprofile
Power Requirements and Physical Characteristics for IBM Machines
To get a summary of several machines on a list, use option Multiple machines.
To look up unknown machine types use Product List.
Additional tool for Power systems: IBM Systems Energy Estimator
Power Requirements and Heat Disipation (KVA and Watts)
The only difference between kW and kVA (Watt and VA) is the power factor.
The power factor, unless known, is an approximation. If not known I use
a power factor of 1. The kVA value is higher or equal the kW value.