{
  "schema_version": "1.0",
  "generated_at": "2026-08-04T18:53:42.224992Z",
  "location": {
    "city_id": "belfast",
    "city": "Belfast",
    "country_code": "GB",
    "country": "United Kingdom",
    "latitude": 54.5968,
    "longitude": -5.9254,
    "timezone": "Europe/London"
  },
  "reference_system": {
    "installedKwp": 10,
    "orientation": "S",
    "tiltDeg": 35,
    "systemLossPct": 14
  },
  "tomorrow_forecast": {
    "cityId": "belfast",
    "name": "Belfast",
    "lat": 54.5968,
    "lon": -5.9254,
    "timezone": "Europe/London",
    "featured": false,
    "targetDate": "2026-08-05",
    "expectedKwh": 23.9,
    "lowKwh": 14.5,
    "highKwh": 32.9,
    "bestWindowStart": "2026-08-05T12:00:00+01:00",
    "bestWindowEnd": "2026-08-05T16:00:00+01:00",
    "confidence": "medium",
    "fetchedAt": "2026-08-04T18:53:42.224992Z",
    "freshness": "fresh",
    "stale": false
  },
  "typical_year": {
    "lat": 54.5968,
    "lon": -5.9254,
    "annualKwh": 9187.56,
    "averageDailyKwh": 25.17,
    "monthly": [
      {
        "month": 1,
        "averageDailyKwh": 9.54,
        "monthlyKwh": 295.71,
        "variabilityKwh": 47.6
      },
      {
        "month": 2,
        "averageDailyKwh": 16.95,
        "monthlyKwh": 474.49,
        "variabilityKwh": 75.26
      },
      {
        "month": 3,
        "averageDailyKwh": 26.01,
        "monthlyKwh": 806.33,
        "variabilityKwh": 127.75
      },
      {
        "month": 4,
        "averageDailyKwh": 36.05,
        "monthlyKwh": 1081.36,
        "variabilityKwh": 148.69
      },
      {
        "month": 5,
        "averageDailyKwh": 39.47,
        "monthlyKwh": 1223.58,
        "variabilityKwh": 105.65
      },
      {
        "month": 6,
        "averageDailyKwh": 38.72,
        "monthlyKwh": 1161.66,
        "variabilityKwh": 134.2
      },
      {
        "month": 7,
        "averageDailyKwh": 35.5,
        "monthlyKwh": 1100.44,
        "variabilityKwh": 104.97
      },
      {
        "month": 8,
        "averageDailyKwh": 32.46,
        "monthlyKwh": 1006.34,
        "variabilityKwh": 89.04
      },
      {
        "month": 9,
        "averageDailyKwh": 27.09,
        "monthlyKwh": 812.84,
        "variabilityKwh": 68.63
      },
      {
        "month": 10,
        "averageDailyKwh": 18.74,
        "monthlyKwh": 580.84,
        "variabilityKwh": 66.65
      },
      {
        "month": 11,
        "averageDailyKwh": 12.69,
        "monthlyKwh": 380.83,
        "variabilityKwh": 62.62
      },
      {
        "month": 12,
        "averageDailyKwh": 8.49,
        "monthlyKwh": 263.15,
        "variabilityKwh": 48.73
      }
    ]
  },
  "comparison": {
    "annual_output_rank_in_country_sample": 9,
    "country_city_count": 12,
    "annual_yield_kwh_per_kwp": 918.756
  },
  "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/"
}