{
  "schema_version": "1.0",
  "generated_at": "2026-08-04T18:53:45.646572Z",
  "location": {
    "city_id": "bialystok",
    "city": "Białystok",
    "country_code": "PL",
    "country": "Poland",
    "latitude": 53.1333,
    "longitude": 23.1643,
    "timezone": "Europe/Warsaw"
  },
  "reference_system": {
    "installedKwp": 10,
    "orientation": "S",
    "tiltDeg": 35,
    "systemLossPct": 14
  },
  "tomorrow_forecast": {
    "cityId": "bialystok",
    "name": "Białystok",
    "lat": 53.1333,
    "lon": 23.1643,
    "timezone": "Europe/Warsaw",
    "featured": false,
    "targetDate": "2026-08-05",
    "expectedKwh": 37.8,
    "lowKwh": 28.8,
    "highKwh": 45.8,
    "bestWindowStart": "2026-08-05T12:00:00+02:00",
    "bestWindowEnd": "2026-08-05T16:00:00+02:00",
    "confidence": "medium",
    "fetchedAt": "2026-08-04T18:53:45.646572Z",
    "freshness": "fresh",
    "stale": false
  },
  "typical_year": {
    "lat": 53.1333,
    "lon": 23.1643,
    "annualKwh": 10152.84,
    "averageDailyKwh": 27.82,
    "monthly": [
      {
        "month": 1,
        "averageDailyKwh": 9.34,
        "monthlyKwh": 289.41,
        "variabilityKwh": 76.48
      },
      {
        "month": 2,
        "averageDailyKwh": 17.39,
        "monthlyKwh": 486.9,
        "variabilityKwh": 114.96
      },
      {
        "month": 3,
        "averageDailyKwh": 28.32,
        "monthlyKwh": 878.07,
        "variabilityKwh": 171.18
      },
      {
        "month": 4,
        "averageDailyKwh": 38.35,
        "monthlyKwh": 1150.45,
        "variabilityKwh": 179.52
      },
      {
        "month": 5,
        "averageDailyKwh": 42.31,
        "monthlyKwh": 1311.65,
        "variabilityKwh": 156.27
      },
      {
        "month": 6,
        "averageDailyKwh": 44.9,
        "monthlyKwh": 1346.86,
        "variabilityKwh": 144.99
      },
      {
        "month": 7,
        "averageDailyKwh": 42.8,
        "monthlyKwh": 1326.86,
        "variabilityKwh": 142.77
      },
      {
        "month": 8,
        "averageDailyKwh": 39.91,
        "monthlyKwh": 1237.18,
        "variabilityKwh": 139.62
      },
      {
        "month": 9,
        "averageDailyKwh": 33.43,
        "monthlyKwh": 1003.01,
        "variabilityKwh": 171.7
      },
      {
        "month": 10,
        "averageDailyKwh": 21.02,
        "monthlyKwh": 651.59,
        "variabilityKwh": 184.61
      },
      {
        "month": 11,
        "averageDailyKwh": 8.72,
        "monthlyKwh": 261.6,
        "variabilityKwh": 60.6
      },
      {
        "month": 12,
        "averageDailyKwh": 6.75,
        "monthlyKwh": 209.28,
        "variabilityKwh": 58.68
      }
    ]
  },
  "comparison": {
    "annual_output_rank_in_country_sample": 9,
    "country_city_count": 10,
    "annual_yield_kwh_per_kwp": 1015.284
  },
  "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/"
}