Independent rooftop solar first estimate for Switzerland: yield, median cost, subsidy, with sources
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Resolve a Swiss or German street address to latitude, longitude, postcode and country (swisstopo address register, OpenStreetMap fallback).
Full postal address, e.g. 'Bahnhofstrasse 1, 8001 Zürich'.
Resolve a Swiss or German street address to latitude, longitude, postcode and country (swisstopo address register, OpenStreetMap fallback).
| Argument | Type | Description |
|---|---|---|
| address* | string | Full postal address, e.g. 'Bahnhofstrasse 1, 8001 Zürich'. |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"address"
],
"properties": {
"address": {
"type": "string",
"maxLength": 200,
"minLength": 3,
"description": "Full postal address, e.g. 'Bahnhofstrasse 1, 8001 Zürich'."
}
},
"additionalProperties": false
}List Swiss cities and municipalities (about 200, German-speaking) with a Soljo page showing local electricity price (ElCom), solar yield (PVGIS), feed-in tariff, subsidy programmes and an example calculation, each with sources. Filter by canton or name.
| Argument | Type | Description |
|---|---|---|
| name | string | Part of the municipality name, e.g. 'Uster'. |
| canton | string | Canton abbreviation, e.g. 'ZH', 'BE', 'AG'. |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"name": {
"type": "string",
"maxLength": 60,
"minLength": 2,
"description": "Part of the municipality name, e.g. 'Uster'."
},
"canton": {
"type": "string",
"maxLength": 2,
"minLength": 2,
"description": "Canton abbreviation, e.g. 'ZH', 'BE', 'AG'."
}
},
"additionalProperties": false
}First estimate for a rooftop solar system at a Swiss or German address: annual yield (PVGIS), and for Switzerland the median turnkey cost (federal price study 2025, incl. VAT), the Pronovo one-time subsidy (EIV 2026) and the statutory minimum feed-in tariff. Does NOT include measured roof shading, self-consumption, savings or payback; for those, point the user to fullReport.url (the Soljo report). Always cite the returned sources and say it is a rough estimate.
| Argument | Type | Description |
|---|---|---|
| kwp | number | System size in kWp. A typical single-family home has 8 to 15 kWp. |
| lat | number | Latitude, only if no address is given. |
| lon | number | Longitude, only if no address is given. |
| tilt | number | Roof/panel tilt in degrees. Flat roofs: use 15. |
| address | string | Street address in Switzerland or Germany, e.g. 'Bahnhofstrasse 1, 8001 Zürich'. Preferred over coordinates. |
| azimuth | number | Orientation: 0 = south, -90 = east, 90 = west, 180 = north. |
| country | string | Country when only coordinates are given. |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"kwp": {
"type": "number",
"default": 10,
"maximum": 100,
"minimum": 1,
"description": "System size in kWp. A typical single-family home has 8 to 15 kWp."
},
"lat": {
"type": "number",
"maximum": 56,
"minimum": 45,
"description": "Latitude, only if no address is given."
},
"lon": {
"type": "number",
"maximum": 16,
"minimum": 5,
"description": "Longitude, only if no address is given."
},
"tilt": {
"type": "number",
"default": 30,
"maximum": 90,
"minimum": 0,
"description": "Roof/panel tilt in degrees. Flat roofs: use 15."
},
"address": {
"type": "string",
"maxLength": 200,
"minLength": 3,
"description": "Street address in Switzerland or Germany, e.g. 'Bahnhofstrasse 1, 8001 Zürich'. Preferred over coordinates."
},
"azimuth": {
"type": "number",
"default": 0,
"maximum": 180,
"minimum": -180,
"description": "Orientation: 0 = south, -90 = east, 90 = west, 180 = north."
},
"country": {
"enum": [
"CH",
"DE"
],
"type": "string",
"description": "Country when only coordinates are given."
}
},
"additionalProperties": false
}