{
  "schema_version": "1.0",
  "generated_at": "2026-08-04T18:53:39.575581Z",
  "location": {
    "city_id": "varna",
    "city": "Varna",
    "country_code": "BG",
    "country": "Bulgaria",
    "latitude": 43.2141,
    "longitude": 27.9147,
    "timezone": "Europe/Sofia"
  },
  "reference_system": {
    "installedKwp": 10,
    "orientation": "S",
    "tiltDeg": 35,
    "systemLossPct": 14
  },
  "tomorrow_forecast": {
    "cityId": "varna",
    "name": "Varna",
    "lat": 43.2141,
    "lon": 27.9147,
    "timezone": "Europe/Sofia",
    "featured": true,
    "targetDate": "2026-08-05",
    "expectedKwh": 54.1,
    "lowKwh": 46.9,
    "highKwh": 60.4,
    "bestWindowStart": "2026-08-05T12:00:00+03:00",
    "bestWindowEnd": "2026-08-05T16:00:00+03:00",
    "confidence": "high",
    "fetchedAt": "2026-08-04T18:53:39.575581Z",
    "freshness": "fresh",
    "stale": false
  },
  "typical_year": {
    "lat": 43.2141,
    "lon": 27.9147,
    "annualKwh": 13453.45,
    "averageDailyKwh": 36.86,
    "monthly": [
      {
        "month": 1,
        "averageDailyKwh": 22.84,
        "monthlyKwh": 707.95,
        "variabilityKwh": 134.94
      },
      {
        "month": 2,
        "averageDailyKwh": 28.22,
        "monthlyKwh": 790.07,
        "variabilityKwh": 133.23
      },
      {
        "month": 3,
        "averageDailyKwh": 34.55,
        "monthlyKwh": 1071.05,
        "variabilityKwh": 133.94
      },
      {
        "month": 4,
        "averageDailyKwh": 42.14,
        "monthlyKwh": 1264.27,
        "variabilityKwh": 148.9
      },
      {
        "month": 5,
        "averageDailyKwh": 45.66,
        "monthlyKwh": 1415.53,
        "variabilityKwh": 82.16
      },
      {
        "month": 6,
        "averageDailyKwh": 47.83,
        "monthlyKwh": 1434.79,
        "variabilityKwh": 116.49
      },
      {
        "month": 7,
        "averageDailyKwh": 50.7,
        "monthlyKwh": 1571.69,
        "variabilityKwh": 107.45
      },
      {
        "month": 8,
        "averageDailyKwh": 51.62,
        "monthlyKwh": 1600.08,
        "variabilityKwh": 62.88
      },
      {
        "month": 9,
        "averageDailyKwh": 43.21,
        "monthlyKwh": 1296.33,
        "variabilityKwh": 107.07
      },
      {
        "month": 10,
        "averageDailyKwh": 31.72,
        "monthlyKwh": 983.23,
        "variabilityKwh": 153.9
      },
      {
        "month": 11,
        "averageDailyKwh": 22.24,
        "monthlyKwh": 667.12,
        "variabilityKwh": 114.13
      },
      {
        "month": 12,
        "averageDailyKwh": 21.01,
        "monthlyKwh": 651.34,
        "variabilityKwh": 154.8
      }
    ]
  },
  "comparison": {
    "annual_output_rank_in_country_sample": 2,
    "country_city_count": 5,
    "annual_yield_kwh_per_kwp": 1345.345
  },
  "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/"
}