{
  "schema_version": "1.0",
  "generated_at": "2026-08-04T18:53:43.564440Z",
  "location": {
    "city_id": "palermo",
    "city": "Palermo",
    "country_code": "IT",
    "country": "Italy",
    "latitude": 38.1166,
    "longitude": 13.3636,
    "timezone": "Europe/Rome"
  },
  "reference_system": {
    "installedKwp": 10,
    "orientation": "S",
    "tiltDeg": 35,
    "systemLossPct": 14
  },
  "tomorrow_forecast": {
    "cityId": "palermo",
    "name": "Palermo",
    "lat": 38.1166,
    "lon": 13.3636,
    "timezone": "Europe/Rome",
    "featured": false,
    "targetDate": "2026-08-05",
    "expectedKwh": 47.5,
    "lowKwh": 33.1,
    "highKwh": 54.7,
    "bestWindowStart": "2026-08-05T10:00:00+02:00",
    "bestWindowEnd": "2026-08-05T14:00:00+02:00",
    "confidence": "medium",
    "fetchedAt": "2026-08-04T18:53:43.564440Z",
    "freshness": "fresh",
    "stale": false
  },
  "typical_year": {
    "lat": 38.1166,
    "lon": 13.3636,
    "annualKwh": 15314.06,
    "averageDailyKwh": 41.96,
    "monthly": [
      {
        "month": 1,
        "averageDailyKwh": 29.45,
        "monthlyKwh": 913.03,
        "variabilityKwh": 134.44
      },
      {
        "month": 2,
        "averageDailyKwh": 35.42,
        "monthlyKwh": 991.7,
        "variabilityKwh": 190.63
      },
      {
        "month": 3,
        "averageDailyKwh": 42.2,
        "monthlyKwh": 1308.24,
        "variabilityKwh": 137.41
      },
      {
        "month": 4,
        "averageDailyKwh": 46.5,
        "monthlyKwh": 1395.1,
        "variabilityKwh": 98.5
      },
      {
        "month": 5,
        "averageDailyKwh": 49.24,
        "monthlyKwh": 1526.56,
        "variabilityKwh": 124.39
      },
      {
        "month": 6,
        "averageDailyKwh": 51.03,
        "monthlyKwh": 1530.77,
        "variabilityKwh": 52.86
      },
      {
        "month": 7,
        "averageDailyKwh": 53.44,
        "monthlyKwh": 1656.5,
        "variabilityKwh": 32.69
      },
      {
        "month": 8,
        "averageDailyKwh": 52.22,
        "monthlyKwh": 1618.94,
        "variabilityKwh": 74.97
      },
      {
        "month": 9,
        "averageDailyKwh": 45.07,
        "monthlyKwh": 1352.06,
        "variabilityKwh": 75.64
      },
      {
        "month": 10,
        "averageDailyKwh": 38.31,
        "monthlyKwh": 1187.63,
        "variabilityKwh": 132.91
      },
      {
        "month": 11,
        "averageDailyKwh": 32.3,
        "monthlyKwh": 969.04,
        "variabilityKwh": 109.38
      },
      {
        "month": 12,
        "averageDailyKwh": 27.89,
        "monthlyKwh": 864.49,
        "variabilityKwh": 83.04
      }
    ]
  },
  "comparison": {
    "annual_output_rank_in_country_sample": 3,
    "country_city_count": 10,
    "annual_yield_kwh_per_kwp": 1531.406
  },
  "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/"
}