Cost of Solar Panels in the UK (2025)
A typical 4kWp home solar system costs £6,000–£9,000. Adding battery storage costs a further £2,500–£5,000. Payback periods have shortened to 7–12 years.
How do solar panels work?
Solar PV (photovoltaic) panels convert sunlight into electricity. Surplus electricity can be exported to the grid via the Smart Export Guarantee (SEG), earning you a payment per kWh. Adding battery storage lets you store surplus energy for use in the evening, increasing self-consumption significantly.
MCS certification
MCS (Microgeneration Certification Scheme) certification is required to access the SEG and many finance products. Always use an MCS-certified installer. The scheme also provides a consumer protection guarantee of at least 2 years on the installation.
Cost Breakdown
All prices are indicative UK averages for 2025. Actual costs vary by location, specification, and contractor. London and South East rates are typically 20–35% higher.
| Item | Low | High |
|---|---|---|
| 3kWp system (6 panels) | £5,000 | £7,500 |
| 4kWp system (8–10 panels) | £6,000 | £9,000 |
| 6kWp system (12–14 panels) | £8,000 | £12,000 |
| Battery storage (5–10kWh) | £2,500 | £5,000 |
| EV charger add-on | £800 | £1,500 |
What Affects the Cost?
- ✓System size in kWp — more panels, more output and cost
- ✓Roof angle and orientation — south-facing is optimal
- ✓Whether battery storage is included
- ✓Roof accessibility and scaffold requirements
- ✓Brand and quality of panels and inverter
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Post a Job — It's FreeFrequently Asked Questions
How much can I save with solar panels?
The typical UK homeowner saves £400–£800 per year on electricity bills with a 4kWp system. With battery storage, savings increase to £600–£1,200 per year. Payback periods are currently 7–12 years.
Do I need planning permission for solar panels?
In most cases no — solar panels on a standard pitched roof fall under permitted development. Listed buildings and conservation areas may need consent. Your installer will advise.