{
  "schema_version": "1.0",
  "generated_at": "2026-08-04T18:53:43.380205Z",
  "location": {
    "city_id": "selfoss",
    "city": "Selfoss",
    "country_code": "IS",
    "country": "Iceland",
    "latitude": 63.9331,
    "longitude": -20.9971,
    "timezone": "Atlantic/Reykjavik"
  },
  "reference_system": {
    "installedKwp": 10,
    "orientation": "S",
    "tiltDeg": 35,
    "systemLossPct": 14
  },
  "tomorrow_forecast": {
    "cityId": "selfoss",
    "name": "Selfoss",
    "lat": 63.9331,
    "lon": -20.9971,
    "timezone": "Atlantic/Reykjavik",
    "featured": false,
    "targetDate": "2026-08-05",
    "expectedKwh": 10.6,
    "lowKwh": 6.7,
    "highKwh": 14.3,
    "bestWindowStart": "2026-08-05T16:00:00+00:00",
    "bestWindowEnd": "2026-08-05T20:00:00+00:00",
    "confidence": "medium",
    "fetchedAt": "2026-08-04T18:53:43.380205Z",
    "freshness": "fresh",
    "stale": false
  },
  "typical_year": {
    "lat": 63.9331,
    "lon": -20.9971,
    "annualKwh": 8070.59,
    "averageDailyKwh": 22.11,
    "monthly": [
      {
        "month": 1,
        "averageDailyKwh": 1.29,
        "monthlyKwh": 39.98,
        "variabilityKwh": 34.8
      },
      {
        "month": 2,
        "averageDailyKwh": 7.31,
        "monthlyKwh": 204.63,
        "variabilityKwh": 70.31
      },
      {
        "month": 3,
        "averageDailyKwh": 19.78,
        "monthlyKwh": 613.17,
        "variabilityKwh": 171.5
      },
      {
        "month": 4,
        "averageDailyKwh": 33.5,
        "monthlyKwh": 1004.92,
        "variabilityKwh": 146.99
      },
      {
        "month": 5,
        "averageDailyKwh": 43.96,
        "monthlyKwh": 1362.8,
        "variabilityKwh": 196.14
      },
      {
        "month": 6,
        "averageDailyKwh": 42.21,
        "monthlyKwh": 1266.18,
        "variabilityKwh": 175.71
      },
      {
        "month": 7,
        "averageDailyKwh": 41.35,
        "monthlyKwh": 1282,
        "variabilityKwh": 151.51
      },
      {
        "month": 8,
        "averageDailyKwh": 35.5,
        "monthlyKwh": 1100.57,
        "variabilityKwh": 100.03
      },
      {
        "month": 9,
        "averageDailyKwh": 23.35,
        "monthlyKwh": 700.38,
        "variabilityKwh": 110.78
      },
      {
        "month": 10,
        "averageDailyKwh": 12.47,
        "monthlyKwh": 386.64,
        "variabilityKwh": 71.84
      },
      {
        "month": 11,
        "averageDailyKwh": 3.2,
        "monthlyKwh": 96.09,
        "variabilityKwh": 31.44
      },
      {
        "month": 12,
        "averageDailyKwh": 0.43,
        "monthlyKwh": 13.22,
        "variabilityKwh": 7.96
      }
    ]
  },
  "comparison": {
    "annual_output_rank_in_country_sample": 2,
    "country_city_count": 4,
    "annual_yield_kwh_per_kwp": 807.059
  },
  "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/"
}