| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 73 |
61.9%
|
| 2 | Mains | 1 |
0.8%
|
| 3 | Generator | 39 |
33.1%
|
| 4 | Battery (car) | 2 |
1.7%
|
| 5 | Solar | 2 |
1.7%
|
| 9 | Other | 1 |
0.8%
|
| Sysmiss | 138 |