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AnswerHow much does a 4kW solar system cost?
A 4 kWp solar system costs about £6,400–£8,000 installed and generates roughly 3,600 kWh a year (about 9 panels).
| Cost | £6,400–£8,000 |
|---|---|
| Generation | ~3,600 kWh/yr |
2026 figures, based on Energy Saving Trust, Ofgem & gov.uk data · always confirm with a professional survey.