| LAGIE | Electricity Market Operator |
| LCOE | Levelized Cost of Energy |
| LHV | Lower Heating Value |
| NEEDS―New Energy Externalities Development for Sustainability | Research Project funded by the European Commission under the Sixth Framework Programme (FP6)n |
| NOx | Nitrogen Oxide |
| NPV | Net Present Value |
| PM2.5 | Particulate Matter that has a diameter of less than 2.5 micrometers |
| PPA | Power Purchase Agreement |
| PV | Photovoltaic |
| PURPA | Public Utility Regulatory Policies Act |
| REN21 | Renewable Energy Policy Network for the 21st Century |
| RES | Renewable Energy Sources |
| RES S.B. | Social Benefits of Renewable Energy |
| SIMP | System Imbalance Marginal Price |
| SMP | System Marginal Price |
| SO2 | Sulfur Dioxide |
| T.Env.Ben. | Total Environmental Benefit per RES technology |
| TGC | Tradable Green Certificates |
| TS | Tender Schemes |
| WAVCTU | Weighted Average Variable Cost of Thermal Units |