Sunday, 3 May 2026
Solar generation in Ballymena, Sunday, 3 May 2026
Mixed cloud over Ballymena. Even so, a 4kW install would generate around 6.8 kWh today.
4kW system
Typical 3-bed NI home (10-12 panels)
6.8 kWh
£2.29 of electricity
6kW system
Larger home, EV owner, or heat pump
10.2 kWh
£3.43 of electricity
Weather on the day
- Sunshine
- 0.0 h
- Cloud cover
- 99%
- Max temp
- 11.7°C
- Solar radiation
- 2.19 kWh/m²
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How we worked this out
We used daily shortwave radiation data for Ballymena 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.