Section 2(1)(b) in Bihar Electricity Regulatory Commission (Terms and Conditions for Solar Energy Sources) Regulations, 2010
(b)'Auxiliary energy consumption' or 'AUX' in relation to a period in case of a generating station means the quantum of energy consumed by auxiliary equipments of the generating station, and transformer losses generating station, expressed as a percentage of the sum of gross energy generated at the generator terminals of all the units of the generating station;