| A, Amp or Ampere | The measure of Electrical Current |
| AC | Alternating Current |
| AEMC | Australian Energy Market Commission (responsible for development of the NER) |
| AEMO – Australian Energy Market Operator | Operator responsible for the operation of the National Electricity Market on the east coast of Australia |
| AER | Australian Energy Regulator (responsible for the regulation of the NEM) |
| AS4777 | Australian Standard for the grid connection of energy systems via inverters |
| ASP3 | Accredited Service Provider Level 3 designer (specific to NSW) |
| CISA | Connection Investigation Services Agreement (specific to Essential Energy) |
| DC | Direct Current |
| DLF Distribution Loss Factor | A factor around 1 that indicates the losses associated with the operation of a generator or load at a particular connection point on the distribution network |
| DNSP | Distribution Network Service Provider (Aka Supply Authority) |
| DUoS | Distribution Use of System – fees paid to a DNSP for the use of their network |
| Embedded Generator: | An embedded generator is an electricity generator that is connected to the local electricity distribution network rather than the (higher voltage) transmission network. This definition includes all types of connected generation, including co-generators and renewables. |
| IMOWA | Independent Market Operator of Western Australia (responsible for the WEM Rules and operation of the WEM) |
| kVA or kiloVoltAmp | The measure of Total Power |
| kVAr or kiloVoltAmpReactive | The measure of Reactive Power |
| kW or kiloWatt | The measure of Real Power |
| kWh or kiloWattHour | A measure of the energy generated by the system |
| MLF Marginal Loss Factor | A factor around 1 that indicates the losses associated with the operation of a generator or load at a particular connection point on the transmission network. |
| NECF | National Energy Customer Framework |
| NEM National Electricity Market | The electricity market that includes QLD, NSW, VIC, SA, ACT and TAS |
| NER | National Electricity Rules (applying in the NEM) |
| NSP | Network Service Provider |
| Power Factor | The ratio of Reactive and Real power in a system |
| SCADA | Supervisory Control and Data Acquisition |
| SWIS South-West Interconnected System | The network located in southern Western Australia |
| TNSP | Transmission Network Service Provider |
| TUoS Transmission Use of System | Fees paid to a TNSP for the use of their network |
| V or kV Volt or kiloVolt | The measure of Electrical Potential |
| WEM | Wholesale Electricity Market (in Western Australia) |