| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 138 |
53.9%
|
| 2 | Mains | 71 |
27.7%
|
| 3 | Generator | 2 |
0.8%
|
| 4 | Battery (car) | 1 |
0.4%
|
| 5 | Solar | 36 |
14.1%
|
| 9 | Other | 8 |
3.1%
|