{
  "schema_version": "1.0",
  "generated_at": "2026-08-04T18:53:45.530406Z",
  "location": {
    "city_id": "lodz",
    "city": "Łódź",
    "country_code": "PL",
    "country": "Poland",
    "latitude": 52.2545,
    "longitude": 16.7423,
    "timezone": "Europe/Warsaw"
  },
  "reference_system": {
    "installedKwp": 10,
    "orientation": "S",
    "tiltDeg": 35,
    "systemLossPct": 14
  },
  "tomorrow_forecast": {
    "cityId": "lodz",
    "name": "Łódź",
    "lat": 52.2545,
    "lon": 16.7423,
    "timezone": "Europe/Warsaw",
    "featured": false,
    "targetDate": "2026-08-05",
    "expectedKwh": 36.7,
    "lowKwh": 24.2,
    "highKwh": 47.4,
    "bestWindowStart": "2026-08-05T12:00:00+02:00",
    "bestWindowEnd": "2026-08-05T16:00:00+02:00",
    "confidence": "medium",
    "fetchedAt": "2026-08-04T18:53:45.530406Z",
    "freshness": "fresh",
    "stale": false
  },
  "typical_year": {
    "lat": 51.7706,
    "lon": 19.4739,
    "annualKwh": 10591.06,
    "averageDailyKwh": 29.02,
    "monthly": [
      {
        "month": 1,
        "averageDailyKwh": 10.99,
        "monthlyKwh": 340.68,
        "variabilityKwh": 102.61
      },
      {
        "month": 2,
        "averageDailyKwh": 17.92,
        "monthlyKwh": 501.84,
        "variabilityKwh": 111.4
      },
      {
        "month": 3,
        "averageDailyKwh": 29.42,
        "monthlyKwh": 911.95,
        "variabilityKwh": 188.35
      },
      {
        "month": 4,
        "averageDailyKwh": 39.98,
        "monthlyKwh": 1199.52,
        "variabilityKwh": 194.07
      },
      {
        "month": 5,
        "averageDailyKwh": 42.37,
        "monthlyKwh": 1313.43,
        "variabilityKwh": 172.12
      },
      {
        "month": 6,
        "averageDailyKwh": 44.66,
        "monthlyKwh": 1339.84,
        "variabilityKwh": 141.29
      },
      {
        "month": 7,
        "averageDailyKwh": 42.15,
        "monthlyKwh": 1306.53,
        "variabilityKwh": 149.59
      },
      {
        "month": 8,
        "averageDailyKwh": 40.32,
        "monthlyKwh": 1249.85,
        "variabilityKwh": 131.24
      },
      {
        "month": 9,
        "averageDailyKwh": 35,
        "monthlyKwh": 1050.07,
        "variabilityKwh": 167.43
      },
      {
        "month": 10,
        "averageDailyKwh": 23.89,
        "monthlyKwh": 740.73,
        "variabilityKwh": 175.01
      },
      {
        "month": 11,
        "averageDailyKwh": 12.04,
        "monthlyKwh": 361.07,
        "variabilityKwh": 83.01
      },
      {
        "month": 12,
        "averageDailyKwh": 8.89,
        "monthlyKwh": 275.55,
        "variabilityKwh": 79.1
      }
    ]
  },
  "comparison": {
    "annual_output_rank_in_country_sample": 5,
    "country_city_count": 10,
    "annual_yield_kwh_per_kwp": 1059.106
  },
  "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/"
}