| Similarity | Rank | |
|---|---|---|
| solar | 0.750 | 2460 |
| battery-powered | 0.737 | 58574 |
| off-grid | 0.732 | 64101 |
| energy-efficient | 0.709 | 24948 |
| high-efficiency | 0.704 | 53165 |
| photovoltaic | 0.703 | 22415 |
| all-electric | 0.683 | 60293 |
| remote-controlled | 0.683 | 84944 |
| battery-operated | 0.681 | 82676 |
| electric | 0.673 | 2570 |
| photovoltaics | 0.671 | 66103 |
| powered | 0.669 | 5661 |
| energy-saving | 0.650 | 35516 |
| environmentally-friendly | 0.647 | 47015 |
| Solar | 0.646 | 7195 |
| retrofitted | 0.644 | 55304 |
| retrofit | 0.638 | 30084 |
| gas-powered | 0.638 | 73143 |
| electricity | 0.634 | 3160 |
| submersible | 0.631 | 54364 |
| low-energy | 0.629 | 72889 |
| portable | 0.629 | 5656 |
| rooftop | 0.629 | 18074 |
| heaters | 0.629 | 15430 |
| voltaic | 0.628 | 57929 |