{
  "schema_version": "1.0",
  "generated_at": "2026-08-04T18:53:39.799255Z",
  "location": {
    "city_id": "bern",
    "city": "Bern",
    "country_code": "CH",
    "country": "Switzerland",
    "latitude": 46.9481,
    "longitude": 7.4474,
    "timezone": "Europe/Zurich"
  },
  "reference_system": {
    "installedKwp": 10,
    "orientation": "S",
    "tiltDeg": 35,
    "systemLossPct": 14
  },
  "tomorrow_forecast": {
    "cityId": "bern",
    "name": "Bern",
    "lat": 46.9481,
    "lon": 7.4474,
    "timezone": "Europe/Zurich",
    "featured": false,
    "targetDate": "2026-08-05",
    "expectedKwh": 49.6,
    "lowKwh": 36.8,
    "highKwh": 57.3,
    "bestWindowStart": "2026-08-05T11:00:00+02:00",
    "bestWindowEnd": "2026-08-05T15:00:00+02:00",
    "confidence": "medium",
    "fetchedAt": "2026-08-04T18:53:39.799255Z",
    "freshness": "fresh",
    "stale": false
  },
  "typical_year": {
    "lat": 46.9481,
    "lon": 7.4474,
    "annualKwh": 12416.25,
    "averageDailyKwh": 34.02,
    "monthly": [
      {
        "month": 1,
        "averageDailyKwh": 20,
        "monthlyKwh": 620,
        "variabilityKwh": 137.71
      },
      {
        "month": 2,
        "averageDailyKwh": 29.19,
        "monthlyKwh": 817.4,
        "variabilityKwh": 158.54
      },
      {
        "month": 3,
        "averageDailyKwh": 37.16,
        "monthlyKwh": 1151.94,
        "variabilityKwh": 190.33
      },
      {
        "month": 4,
        "averageDailyKwh": 42,
        "monthlyKwh": 1260.1,
        "variabilityKwh": 217.27
      },
      {
        "month": 5,
        "averageDailyKwh": 40.61,
        "monthlyKwh": 1259.06,
        "variabilityKwh": 153.47
      },
      {
        "month": 6,
        "averageDailyKwh": 44.87,
        "monthlyKwh": 1346.1,
        "variabilityKwh": 153.23
      },
      {
        "month": 7,
        "averageDailyKwh": 45.78,
        "monthlyKwh": 1419.19,
        "variabilityKwh": 131.45
      },
      {
        "month": 8,
        "averageDailyKwh": 42.17,
        "monthlyKwh": 1307.34,
        "variabilityKwh": 114.32
      },
      {
        "month": 9,
        "averageDailyKwh": 39.01,
        "monthlyKwh": 1170.35,
        "variabilityKwh": 97.11
      },
      {
        "month": 10,
        "averageDailyKwh": 30.53,
        "monthlyKwh": 946.37,
        "variabilityKwh": 125.17
      },
      {
        "month": 11,
        "averageDailyKwh": 20.59,
        "monthlyKwh": 617.82,
        "variabilityKwh": 110.55
      },
      {
        "month": 12,
        "averageDailyKwh": 16.15,
        "monthlyKwh": 500.6,
        "variabilityKwh": 158.17
      }
    ]
  },
  "comparison": {
    "annual_output_rank_in_country_sample": 4,
    "country_city_count": 8,
    "annual_yield_kwh_per_kwp": 1241.625
  },
  "sources": {
    "tomorrow": {
      "weather": {
        "source_id": "OPEN_METEO",
        "name": "Open-Meteo weather forecast",
        "public_display_allowed": true,
        "requires_commercial_license": true,
        "terms_url": "https://open-meteo.com/en/terms",
        "pricing_url": "https://open-meteo.com/en/pricing"
      },
      "model": {
        "source_id": "GRIDPASSPORT_PV_PUBLIC_V1",
        "name": "GridPassport public PV forecast model",
        "description": "Weather-based physical PV estimate with public-safe inputs."
      },
      "attribution": {
        "text": "Weather forecast by Open-Meteo, PV estimate by GridPassport.",
        "transformation_notes": "GridPassport projects irradiance onto the configured PV array and applies public lead-magnet loss assumptions."
      }
    },
    "typical_year": {
      "name": "European Commission Joint Research Centre PVGIS 5.3",
      "url": "https://joint-research-centre.ec.europa.eu/photovoltaic-geographical-information-system-pvgis_en",
      "api": "https://re.jrc.ec.europa.eu/api/v5_3/PVcalc",
      "method": "Monthly average fixed-system output calculated from a multi-year solar radiation and climate series."
    }
  },
  "methodology_url": "https://gridpassport.com/solar-forecast/methodology/"
}