@openstreetmap/id-tagging-schema/data/fields/plant/method/solar.json

The OpenStreetMap tagging model used by the iD editor

{
    "key": "plant:method",
    "type": "combo",
    "label": "{plant/method}",
    "stringsCrossReference": "{generator/method}",
    "options": [
        "thermal",
        "photovoltaic"
    ],
    "autoSuggestions": false,
    "prerequisiteTag": {
        "key": "plant:source",
        "value": "solar"
    }
}