{
  "schema_version": "1.0",
  "generated_at": "2026-08-04T18:53:40.450007Z",
  "location": {
    "city_id": "cologne",
    "city": "Cologne",
    "country_code": "DE",
    "country": "Germany",
    "latitude": 50.9333,
    "longitude": 6.95,
    "timezone": "Europe/Berlin"
  },
  "reference_system": {
    "installedKwp": 10,
    "orientation": "S",
    "tiltDeg": 35,
    "systemLossPct": 14
  },
  "tomorrow_forecast": {
    "cityId": "cologne",
    "name": "Cologne",
    "lat": 50.9333,
    "lon": 6.95,
    "timezone": "Europe/Berlin",
    "featured": false,
    "targetDate": "2026-08-05",
    "expectedKwh": 38,
    "lowKwh": 27.2,
    "highKwh": 46.7,
    "bestWindowStart": "2026-08-05T10:00:00+02:00",
    "bestWindowEnd": "2026-08-05T14:00:00+02:00",
    "confidence": "medium",
    "fetchedAt": "2026-08-04T18:53:40.450007Z",
    "freshness": "fresh",
    "stale": false
  },
  "typical_year": {
    "lat": 50.9333,
    "lon": 6.95,
    "annualKwh": 10420.92,
    "averageDailyKwh": 28.55,
    "monthly": [
      {
        "month": 1,
        "averageDailyKwh": 12.02,
        "monthlyKwh": 372.63,
        "variabilityKwh": 86.54
      },
      {
        "month": 2,
        "averageDailyKwh": 20.19,
        "monthlyKwh": 565.25,
        "variabilityKwh": 143.97
      },
      {
        "month": 3,
        "averageDailyKwh": 29.95,
        "monthlyKwh": 928.43,
        "variabilityKwh": 185.21
      },
      {
        "month": 4,
        "averageDailyKwh": 39.03,
        "monthlyKwh": 1170.98,
        "variabilityKwh": 175.73
      },
      {
        "month": 5,
        "averageDailyKwh": 40.82,
        "monthlyKwh": 1265.28,
        "variabilityKwh": 167.44
      },
      {
        "month": 6,
        "averageDailyKwh": 42.17,
        "monthlyKwh": 1265.02,
        "variabilityKwh": 156.98
      },
      {
        "month": 7,
        "averageDailyKwh": 40.11,
        "monthlyKwh": 1243.28,
        "variabilityKwh": 146.85
      },
      {
        "month": 8,
        "averageDailyKwh": 37.11,
        "monthlyKwh": 1150.47,
        "variabilityKwh": 116.24
      },
      {
        "month": 9,
        "averageDailyKwh": 33.3,
        "monthlyKwh": 998.92,
        "variabilityKwh": 110.95
      },
      {
        "month": 10,
        "averageDailyKwh": 22.94,
        "monthlyKwh": 711.06,
        "variabilityKwh": 118.45
      },
      {
        "month": 11,
        "averageDailyKwh": 14.46,
        "monthlyKwh": 433.86,
        "variabilityKwh": 95.24
      },
      {
        "month": 12,
        "averageDailyKwh": 10.18,
        "monthlyKwh": 315.73,
        "variabilityKwh": 76.36
      }
    ]
  },
  "comparison": {
    "annual_output_rank_in_country_sample": 6,
    "country_city_count": 12,
    "annual_yield_kwh_per_kwp": 1042.092
  },
  "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/"
}