{
  "schema_version": "1.1",
  "generated_at": "2026-10-04T22:01:23.856204Z",
  "evaluated_at": "2026-10-04T22:44:42.730Z",
  "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": "swansea",
    "city": "Swansea",
    "country_code": "GB",
    "country": "United Kingdom",
    "latitude": 51.6208,
    "longitude": -3.9432,
    "timezone": "Europe/London"
  },
  "forecast_status": "current",
  "tomorrow_forecast": {
    "cityId": "swansea",
    "name": "Swansea",
    "lat": 51.6208,
    "lon": -3.9432,
    "timezone": "Europe/London",
    "featured": false,
    "targetDate": "2026-10-05",
    "expectedKwh": 14.3,
    "lowKwh": 9.3,
    "highKwh": 19.1,
    "bestWindowStart": "2026-10-05T10:00:00+01:00",
    "bestWindowEnd": "2026-10-05T14:00:00+01:00",
    "confidence": "medium",
    "fetchedAt": "2026-10-04T22:01:23.856204Z",
    "freshness": "fresh",
    "stale": false
  },
  "typical_year": {
    "lat": 51.6208,
    "lon": -3.9432,
    "annualKwh": 10140.64,
    "averageDailyKwh": 27.78,
    "monthly": [
      {
        "month": 1,
        "averageDailyKwh": 11.57,
        "monthlyKwh": 358.82,
        "variabilityKwh": 55.85
      },
      {
        "month": 2,
        "averageDailyKwh": 18.85,
        "monthlyKwh": 527.79,
        "variabilityKwh": 86.01
      },
      {
        "month": 3,
        "averageDailyKwh": 28.22,
        "monthlyKwh": 874.7,
        "variabilityKwh": 140.23
      },
      {
        "month": 4,
        "averageDailyKwh": 39.31,
        "monthlyKwh": 1179.25,
        "variabilityKwh": 148.06
      },
      {
        "month": 5,
        "averageDailyKwh": 41.51,
        "monthlyKwh": 1286.68,
        "variabilityKwh": 131.64
      },
      {
        "month": 6,
        "averageDailyKwh": 42.49,
        "monthlyKwh": 1274.74,
        "variabilityKwh": 149.22
      },
      {
        "month": 7,
        "averageDailyKwh": 39.65,
        "monthlyKwh": 1229.1,
        "variabilityKwh": 143.32
      },
      {
        "month": 8,
        "averageDailyKwh": 35.59,
        "monthlyKwh": 1103.34,
        "variabilityKwh": 127.59
      },
      {
        "month": 9,
        "averageDailyKwh": 31.09,
        "monthlyKwh": 932.69,
        "variabilityKwh": 103.29
      },
      {
        "month": 10,
        "averageDailyKwh": 20.22,
        "monthlyKwh": 626.93,
        "variabilityKwh": 77.61
      },
      {
        "month": 11,
        "averageDailyKwh": 14.11,
        "monthlyKwh": 423.35,
        "variabilityKwh": 59.95
      },
      {
        "month": 12,
        "averageDailyKwh": 10.43,
        "monthlyKwh": 323.26,
        "variabilityKwh": 73.39
      }
    ],
    "fetchedAt": "2026-10-04T18:06:23.698Z",
    "sourceUrl": "https://re.jrc.ec.europa.eu/api/v5_3/PVcalc?lat=51.6208&lon=-3.9432&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": 18,
    "country_city_count": 32,
    "annual_yield_kwh_per_kwp": 1014.064
  }
}