{
  "schema_version": "1.1",
  "generated_at": "2026-10-04T22:01:36.295951Z",
  "evaluated_at": "2026-10-04T22:42:50.208Z",
  "reference_system": {
    "installedKwp": 10,
    "orientation": "S",
    "tiltDeg": 35,
    "systemLossPct": 14
  },
  "sources": {
    "tomorrow": {
      "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."
      },
      "model": {
        "description": "Weather-based physical PV estimate with public-safe inputs.",
        "name": "GridPassport public PV forecast model",
        "source_id": "GRIDPASSPORT_PV_PUBLIC_V1"
      },
      "weather": {
        "name": "Open-Meteo weather forecast",
        "pricing_url": "https://open-meteo.com/en/pricing",
        "public_display_allowed": true,
        "requires_commercial_license": true,
        "source_id": "OPEN_METEO",
        "terms_url": "https://open-meteo.com/en/terms"
      }
    },
    "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."
    }
  },
  "license": {
    "identifier": "CC-BY-4.0",
    "name": "Creative Commons Attribution 4.0 International",
    "url": "https://creativecommons.org/licenses/by/4.0/",
    "attribution": "GridPassport Solar Dataset (CC BY 4.0), using Open-Meteo weather data (CC BY 4.0) transformed by GridPassport and typical PV profiles from European Commission JRC PVGIS.",
    "scope": "GridPassport published solar forecast CSV and JSON datasets."
  },
  "methodology_url": "https://gridpassport.com/solar-forecast/methodology/",
  "reuse_terms_url": "https://gridpassport.com/solar-forecast/methodology/#data-license",
  "location": {
    "city_id": "olsztyn",
    "city": "Olsztyn",
    "country_code": "PL",
    "country": "Poland",
    "latitude": 53.7838,
    "longitude": 20.4927,
    "timezone": "Europe/Warsaw"
  },
  "forecast_status": "current",
  "tomorrow_forecast": {
    "cityId": "olsztyn",
    "name": "Olsztyn",
    "lat": 53.7838,
    "lon": 20.4927,
    "timezone": "Europe/Warsaw",
    "featured": false,
    "targetDate": "2026-10-06",
    "expectedKwh": 9.2,
    "lowKwh": 5.9,
    "highKwh": 12.5,
    "bestWindowStart": "2026-10-06T12:00:00+02:00",
    "bestWindowEnd": "2026-10-06T16:00:00+02:00",
    "confidence": "medium",
    "fetchedAt": "2026-10-04T22:01:36.295951Z",
    "freshness": "fresh",
    "stale": false
  },
  "typical_year": {
    "lat": 53.7838,
    "lon": 20.4927,
    "annualKwh": 10094.76,
    "averageDailyKwh": 27.66,
    "monthly": [
      {
        "month": 1,
        "averageDailyKwh": 9.03,
        "monthlyKwh": 280,
        "variabilityKwh": 68.17
      },
      {
        "month": 2,
        "averageDailyKwh": 17.41,
        "monthlyKwh": 487.53,
        "variabilityKwh": 114.02
      },
      {
        "month": 3,
        "averageDailyKwh": 28.43,
        "monthlyKwh": 881.42,
        "variabilityKwh": 202.02
      },
      {
        "month": 4,
        "averageDailyKwh": 39.44,
        "monthlyKwh": 1183.07,
        "variabilityKwh": 175.62
      },
      {
        "month": 5,
        "averageDailyKwh": 42.5,
        "monthlyKwh": 1317.52,
        "variabilityKwh": 169.18
      },
      {
        "month": 6,
        "averageDailyKwh": 44.11,
        "monthlyKwh": 1323.34,
        "variabilityKwh": 146.52
      },
      {
        "month": 7,
        "averageDailyKwh": 41.62,
        "monthlyKwh": 1290.13,
        "variabilityKwh": 132.5
      },
      {
        "month": 8,
        "averageDailyKwh": 38.87,
        "monthlyKwh": 1205.03,
        "variabilityKwh": 143
      },
      {
        "month": 9,
        "averageDailyKwh": 33.41,
        "monthlyKwh": 1002.32,
        "variabilityKwh": 159.12
      },
      {
        "month": 10,
        "averageDailyKwh": 21.31,
        "monthlyKwh": 660.76,
        "variabilityKwh": 164.58
      },
      {
        "month": 11,
        "averageDailyKwh": 8.75,
        "monthlyKwh": 262.48,
        "variabilityKwh": 56.57
      },
      {
        "month": 12,
        "averageDailyKwh": 6.49,
        "monthlyKwh": 201.17,
        "variabilityKwh": 43.68
      }
    ],
    "fetchedAt": "2026-10-04T18:06:28.644Z",
    "sourceUrl": "https://re.jrc.ec.europa.eu/api/v5_3/PVcalc?lat=53.7838&lon=20.4927&peakpower=10&loss=14&angle=35&aspect=0&outputformat=json",
    "radiationDatabase": "PVGIS-SARAH3",
    "sourcePeriod": {
      "fromYear": 2005,
      "throughYear": 2023
    }
  },
  "comparison": {
    "annual_output_rank_in_country_sample": 38,
    "country_city_count": 40,
    "annual_yield_kwh_per_kwp": 1009.476
  }
}