{
  "schema_version": "1.0",
  "generated_at": "2026-08-04T18:53:43.686507Z",
  "location": {
    "city_id": "catania",
    "city": "Catania",
    "country_code": "IT",
    "country": "Italy",
    "latitude": 37.4922,
    "longitude": 15.0704,
    "timezone": "Europe/Rome"
  },
  "reference_system": {
    "installedKwp": 10,
    "orientation": "S",
    "tiltDeg": 35,
    "systemLossPct": 14
  },
  "tomorrow_forecast": {
    "cityId": "catania",
    "name": "Catania",
    "lat": 37.4922,
    "lon": 15.0704,
    "timezone": "Europe/Rome",
    "featured": false,
    "targetDate": "2026-08-05",
    "expectedKwh": 51.5,
    "lowKwh": 42.3,
    "highKwh": 54.9,
    "bestWindowStart": "2026-08-05T12:00:00+02:00",
    "bestWindowEnd": "2026-08-05T16:00:00+02:00",
    "confidence": "high",
    "fetchedAt": "2026-08-04T18:53:43.686507Z",
    "freshness": "fresh",
    "stale": false
  },
  "typical_year": {
    "lat": 37.4922,
    "lon": 15.0704,
    "annualKwh": 15637.79,
    "averageDailyKwh": 42.84,
    "monthly": [
      {
        "month": 1,
        "averageDailyKwh": 33.84,
        "monthlyKwh": 1049.07,
        "variabilityKwh": 126.31
      },
      {
        "month": 2,
        "averageDailyKwh": 39.21,
        "monthlyKwh": 1097.98,
        "variabilityKwh": 144.97
      },
      {
        "month": 3,
        "averageDailyKwh": 43.24,
        "monthlyKwh": 1340.44,
        "variabilityKwh": 130
      },
      {
        "month": 4,
        "averageDailyKwh": 46.59,
        "monthlyKwh": 1397.67,
        "variabilityKwh": 108.47
      },
      {
        "month": 5,
        "averageDailyKwh": 48.5,
        "monthlyKwh": 1503.4,
        "variabilityKwh": 106.35
      },
      {
        "month": 6,
        "averageDailyKwh": 49.85,
        "monthlyKwh": 1495.5,
        "variabilityKwh": 62.34
      },
      {
        "month": 7,
        "averageDailyKwh": 52.17,
        "monthlyKwh": 1617.34,
        "variabilityKwh": 34.31
      },
      {
        "month": 8,
        "averageDailyKwh": 51.22,
        "monthlyKwh": 1587.71,
        "variabilityKwh": 75.42
      },
      {
        "month": 9,
        "averageDailyKwh": 44.87,
        "monthlyKwh": 1346,
        "variabilityKwh": 76.85
      },
      {
        "month": 10,
        "averageDailyKwh": 38.56,
        "monthlyKwh": 1195.41,
        "variabilityKwh": 125.54
      },
      {
        "month": 11,
        "averageDailyKwh": 34.13,
        "monthlyKwh": 1024.04,
        "variabilityKwh": 103.52
      },
      {
        "month": 12,
        "averageDailyKwh": 31.72,
        "monthlyKwh": 983.23,
        "variabilityKwh": 94.09
      }
    ]
  },
  "comparison": {
    "annual_output_rank_in_country_sample": 1,
    "country_city_count": 10,
    "annual_yield_kwh_per_kwp": 1563.779
  },
  "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/"
}