Sunday, 22 March 2026
Solar generation in Lisburn, Sunday, 22 March 2026
Overcast in Lisburn. A 4kW install would still produce about 6.2 kWh of free electricity today.
4kW system
Typical 3-bed NI home (10-12 panels)
6.2 kWh
£2.06 of electricity
6kW system
Larger home, EV owner, or heat pump
9.2 kWh
£3.10 of electricity
Weather on the day
- Sunshine
- 3.3 h
- Cloud cover
- 91%
- Max temp
- 12.5°C
- Solar radiation
- 1.98 kWh/m²
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How we worked this out
We used daily shortwave radiation data for Lisburn 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.