Friday, 24 July 2026
Solar generation in Derry, Friday, 24 July 2026
Bright skies over Derry. A 4kW install is on track for about 15.1 kWh today.
4kW system
Typical 3-bed NI home (10-12 panels)
15.1 kWh
£5.05 of electricity
6kW system
Larger home, EV owner, or heat pump
22.6 kWh
£7.58 of electricity
Weather on the day
- Sunshine
- 9.3 h
- Cloud cover
- 99%
- Max temp
- 21.1°C
- Solar radiation
- 4.84 kWh/m²
Want this generating on your roof?
Compare quotes from MCS certified installers in Derry. Free, no obligation, and quotes for the same system routinely differ by more than £1,000.
Recent days in Derry
How we worked this out
We used daily shortwave radiation data for Derry 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 tracker's fixed assumption. Power NI's standard credit rate is 32.100p, so a Power NI household should read these savings as slightly high.
Figures are an estimate based on observed conditions and a representative install. Actual generation varies with roof orientation, shading and hardware.