Solar Panel Costs UK
This guide explains typical UK solar panel prices, what changes the cost, and how to judge value. It’s designed for homeowners comparing quotes or deciding whether solar is worth it in 2025–2026.
Quick navigation: Typical solar costs · What affects price · Battery storage costs · Is solar worth it? · VAT & SEG · Quote checklist · FAQs
Typical solar panel costs in the UK (realistic ranges)
UK solar costs depend on system size (kW), roof complexity, inverter choice and installation access. As a working rule, larger systems cost more overall, but can reduce the cost per kW.
Example UK price ranges by common system sizes
| System size (approx.) | Who it typically suits | Typical installed price range |
|---|---|---|
| 2–3 kW | Lower usage / smaller roofs | £4,000–£6,500 |
| 4–5 kW | Average households | £6,000–£9,500 |
| 6 kW+ | Higher usage / EV / bigger roofs | £9,000–£14,000+ |
These ranges are intended to help you sanity-check quotes. For transparency on how we form these ranges, see How we calculate UK solar costs.
What affects the cost of solar panels?
1) Roof complexity and access
Steeper pitches, multiple roof faces, scaffolding requirements and limited access can increase installation costs. Two houses with the same number of panels can have different quote totals.
2) Panel and inverter quality
Panels vary by efficiency, warranty, brand reputation and temperature performance. Inverters (string vs hybrid vs micro-inverters) also change total cost and flexibility.
3) System design and generation
Better designs can generate more usable electricity. Cheaper systems can under-deliver even if upfront cost is lower.
4) Your usage pattern
Solar value depends heavily on how much power you use during daylight hours. Homes that can shift usage usually perform better financially.
Battery storage costs in the UK (and when it makes sense)
Home batteries can increase self-use of solar generation and help with smart tariffs. Value depends on your tariff, usage pattern and export levels.
Typical UK battery price ranges (installed)
| Battery size (usable kWh) | Typical installed price range | Common fit |
|---|---|---|
| 5 kWh | £3,500–£6,000 | Smaller homes / light evening use |
| 8–10 kWh | £5,500–£9,500 | Average homes |
| 12–15 kWh+ | £8,500–£14,000+ | High usage / EV |
If you’re thinking of adding a battery later, ensure your quote uses a compatible inverter. See What to check in quotes.
What to check in a solar quote (UK checklist)
Core specification
- System size (kW) and number of panels
- Panel model, efficiency and warranty
- Inverter type and warranty
- Expected annual generation (kWh)
Installation and protections
- Scaffolding included
- Bird protection / mesh
- Monitoring and export metering
- Workmanship warranty and aftercare
Battery (if included)
- Usable capacity and cycle warranty
- Backup capability
- Future expandability