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"bestWindowEnd": "2026-08-05T12:00:00+01:00", "confidence": "medium", "fetchedAt": "2026-08-04T18:53:42.255636Z", "freshness": "fresh", "stale": false }, "typical_annual_kwh": 9443.1, "typical_monthly": [ { "month": 1, "averageDailyKwh": 11.06, "monthlyKwh": 342.83, "variabilityKwh": 66.61 }, { "month": 2, "averageDailyKwh": 17.57, "monthlyKwh": 491.98, "variabilityKwh": 96.23 }, { "month": 3, "averageDailyKwh": 26.8, "monthlyKwh": 830.82, "variabilityKwh": 150.58 }, { "month": 4, "averageDailyKwh": 35.74, "monthlyKwh": 1072.34, "variabilityKwh": 153.24 }, { "month": 5, "averageDailyKwh": 38.09, "monthlyKwh": 1180.93, "variabilityKwh": 128.61 }, { "month": 6, "averageDailyKwh": 37.58, "monthlyKwh": 1127.39, "variabilityKwh": 129.97 }, { "month": 7, "averageDailyKwh": 37.32, "monthlyKwh": 1156.88, "variabilityKwh": 136 }, { "month": 8, "averageDailyKwh": 34.63, "monthlyKwh": 1073.39, "variabilityKwh": 86.8 }, { "month": 9, "averageDailyKwh": 29.13, "monthlyKwh": 873.88, "variabilityKwh": 55.08 }, { "month": 10, "averageDailyKwh": 19.37, "monthlyKwh": 600.54, "variabilityKwh": 89.17 }, { "month": 11, "averageDailyKwh": 13.19, "monthlyKwh": 395.77, "variabilityKwh": 75.15 }, { "month": 12, "averageDailyKwh": 9.56, "monthlyKwh": 296.34, "variabilityKwh": 45.91 } ] } ], "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/" }