| 136 / | HD | BATTERIES: THERMOELECTRIC AND PHOTOELECTRIC |
| 243 | DF | PHOTOELECTRIC {2} |
| 244 | DF | .~ Panel or array {5} |
| 246 | ![]() | .~.~ With concentrator, orientator, reflector, or cooling means {2} |
| 247 | DF | .~.~.~> Fluorescent concentrator |
| 248 | DF | .~.~.~> Hybrid conversion system |