How much does a 6kW solar system cost?
Priced June 2026
A 6kW solar system costs £9,000–£11,500 installed — about 14 panels, generating ~5,100 kWh a year.
Best suited to 3–4 bed home, ev or heat pump. Payback is typically 9–13 years.
| Typical installed cost | £9,000–£11,500 |
| Number of panels | ~14 panels |
| Annual generation | ~5,100 kWh |
| Typical payback | 9–13 years |
| Best suited to | 3–4 bed home, EV or heat pump |
| Roughly per kW | £1,667/kW |
A 6kW system sits in the middle of typical UK home installs. The price covers the 14 panels, the inverter, mounting and scaffolding, certified labour and MCS certification — at 0% VAT until 31 March 2027. Here's how it compares to other system sizes:
| System | Low | Typical | High |
|---|---|---|---|
| 3kW | £5,000 | £5,500 | £6,500 |
| 4kW | £6,000 | £7,000 | £8,000 |
| 5kW | £7,500 | £8,500 | £9,800 |
| 6kW | £9,000 | £10,000 | £11,500 |
| 8kW | £11,000 | £12,500 | £14,500 |
| 10kW | £13,000 | £15,000 | £17,000 |
Whether a 6kW system is right for you depends less on your property type than on how much electricity you actually use. Put your own usage into the free calculator to see your cost, saving and payback, or see the full cost-of-solar breakdown.
Frequently asked questions
How much does a 6kW solar system cost in the UK?
A 6kW solar system typically costs £9,000–£11,500 installed in 2026 (panels only, 0% VAT), using around 14 panels — roughly £1,667 per kW.
How much electricity does a 6kW system generate?
A 6kW system generates about 5,100 kWh a year in the UK (south-facing, unshaded), enough for 3–4 bed home, ev or heat pump.
How long does a 6kW system take to pay back?
Typically 9–13 years on panels alone, depending on how much generation you use yourself, your tariff and your region.