| Similarity | Rank | |
|---|---|---|
| photovoltaic | 0.893 | 22415 |
| PV | 0.860 | 14682 |
| Solar | 0.856 | 7195 |
| photovoltaics | 0.852 | 66103 |
| solar | 0.806 | 2460 |
| Renewable | 0.803 | 19768 |
| SunPower | 0.785 | 93594 |
| thin-film | 0.775 | 77599 |
| Biomass | 0.762 | 50798 |
| voltaic | 0.753 | 57929 |
| Renewables | 0.751 | 55257 |
| Inverter | 0.745 | 90729 |
| Geothermal | 0.743 | 51004 |
| CSP | 0.733 | 35309 |
| Electricity | 0.721 | 20930 |
| Energy | 0.720 | 2769 |
| Turbines | 0.717 | 90319 |
| cogeneration | 0.716 | 76666 |
| CPV | 0.701 | 96143 |
| Photonics | 0.698 | 94687 |
| NREL | 0.697 | 96585 |
| inverters | 0.697 | 49071 |
| renewable | 0.692 | 6153 |
| energy-saving | 0.690 | 35516 |
| Lighting | 0.688 | 14660 |