{
  "schema_version": "1.0",
  "generated_at": "2026-08-04T18:53:45.587482Z",
  "location": {
    "city_id": "lublin",
    "city": "Lublin",
    "country_code": "PL",
    "country": "Poland",
    "latitude": 51.2506,
    "longitude": 22.5701,
    "timezone": "Europe/Warsaw"
  },
  "reference_system": {
    "installedKwp": 10,
    "orientation": "S",
    "tiltDeg": 35,
    "systemLossPct": 14
  },
  "tomorrow_forecast": {
    "cityId": "lublin",
    "name": "Lublin",
    "lat": 51.2506,
    "lon": 22.5701,
    "timezone": "Europe/Warsaw",
    "featured": false,
    "targetDate": "2026-08-05",
    "expectedKwh": 45.1,
    "lowKwh": 36.7,
    "highKwh": 48.9,
    "bestWindowStart": "2026-08-05T11:00:00+02:00",
    "bestWindowEnd": "2026-08-05T15:00:00+02:00",
    "confidence": "high",
    "fetchedAt": "2026-08-04T18:53:45.587482Z",
    "freshness": "fresh",
    "stale": false
  },
  "typical_year": {
    "lat": 51.2506,
    "lon": 22.5701,
    "annualKwh": 10795.23,
    "averageDailyKwh": 29.58,
    "monthly": [
      {
        "month": 1,
        "averageDailyKwh": 10.42,
        "monthlyKwh": 322.97,
        "variabilityKwh": 71.32
      },
      {
        "month": 2,
        "averageDailyKwh": 18.3,
        "monthlyKwh": 512.41,
        "variabilityKwh": 110.07
      },
      {
        "month": 3,
        "averageDailyKwh": 29.22,
        "monthlyKwh": 905.79,
        "variabilityKwh": 172.67
      },
      {
        "month": 4,
        "averageDailyKwh": 39.82,
        "monthlyKwh": 1194.74,
        "variabilityKwh": 185.72
      },
      {
        "month": 5,
        "averageDailyKwh": 42.59,
        "monthlyKwh": 1320.31,
        "variabilityKwh": 179.45
      },
      {
        "month": 6,
        "averageDailyKwh": 45.77,
        "monthlyKwh": 1373.02,
        "variabilityKwh": 124.85
      },
      {
        "month": 7,
        "averageDailyKwh": 43.89,
        "monthlyKwh": 1360.74,
        "variabilityKwh": 129.52
      },
      {
        "month": 8,
        "averageDailyKwh": 42,
        "monthlyKwh": 1301.87,
        "variabilityKwh": 125.71
      },
      {
        "month": 9,
        "averageDailyKwh": 35.33,
        "monthlyKwh": 1059.95,
        "variabilityKwh": 165.47
      },
      {
        "month": 10,
        "averageDailyKwh": 25.49,
        "monthlyKwh": 790.11,
        "variabilityKwh": 177.16
      },
      {
        "month": 11,
        "averageDailyKwh": 12.75,
        "monthlyKwh": 382.61,
        "variabilityKwh": 61.64
      },
      {
        "month": 12,
        "averageDailyKwh": 8.73,
        "monthlyKwh": 270.71,
        "variabilityKwh": 89.4
      }
    ]
  },
  "comparison": {
    "annual_output_rank_in_country_sample": 3,
    "country_city_count": 10,
    "annual_yield_kwh_per_kwp": 1079.523
  },
  "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/"
}