Saturday, 21 March 2026
Solar generation in Belfast, Saturday, 21 March 2026
Bright skies over Belfast. A 4kW install is on track for about 11.3 kWh today.
4kW system
Typical 3-bed NI home (10-12 panels)
11.3 kWh
£3.79 of electricity
6kW system
Larger home, EV owner, or heat pump
17 kWh
£5.69 of electricity
Weather on the day
- Sunshine
- 10.6 h
- Cloud cover
- 69%
- Max temp
- 15.5°C
- Solar radiation
- 3.63 kWh/m²
Want this generating on your roof?
Compare quotes from MCS certified installers in Belfast. Free, no obligation, and homeowners save an average of £800 by comparing.
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 observed conditions and a representative install. Actual generation varies with roof orientation, shading and hardware.