Sunday, 6 September 2026 (forecast)
Solar generation in Belfast, Sunday, 6 September 2026
Overcast in Belfast. A 4kW install would still produce about 4 kWh of free electricity today.
4kW system
Typical 3-bed NI home (10-12 panels)
4 kWh
£1.36 of electricity
6kW system
Larger home, EV owner, or heat pump
6.1 kWh
£2.03 of electricity
Weather on the day
- Sunshine
- 0.7 h
- Cloud cover
- 95%
- Max temp
- 20.0°C
- Solar radiation
- 1.30 kWh/m²
Want this generating on your roof?
Compare quotes from MCS certified installers in Belfast. Free, no obligation, and quotes for the same system routinely differ by more than £1,000.
Recent days in Belfast
How we worked this out
We used daily shortwave radiation data for Belfast from Open-Meteo and applied the standard PV yield model:
energy = radiation × system kWp × performance ratio.
The performance ratio is 0.78 (accounts for inverter and temperature losses, orientation and soiling).
Electricity is valued at 33.5p/kWh, the Power NI standard credit tariff.
Figures are an estimate based on forecast conditions and a representative install. Actual generation varies with roof orientation, shading and hardware.