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 because labour and access are different.
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 future flexibility (e.g., adding a battery later).
3) System design and generation
Better designs can generate more usable electricity (panel placement, shading, orientation). In cost terms, this means: cheaper isn’t always better if it under-delivers on generation.
4) Your usage pattern
Solar value depends heavily on how much power you use during daylight hours. If you’re home during the day or can shift usage (washing machine, dishwasher, immersion heater), solar usually performs better financially.
Battery storage costs in the UK (and when it makes sense)
Home batteries can increase self-use of solar generation. They can also help if you’re on a smart tariff and can charge off-peak. Battery value depends on your tariff, usage pattern and whether you’re exporting significant solar.
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 / higher evening use |
| 12–15 kWh+ | £8,500–£14,000+ | High usage / EV / deeper autonomy goals |
If you’re thinking of adding a battery later, ensure your quote uses a compatible inverter approach (often a hybrid inverter). You’ll find a practical checklist in What to check in quotes.
Is solar worth it in the UK?
For most homeowners, solar becomes “worth it” when you can use a meaningful share of what you generate, and when the installed cost is reasonable for the output you’ll get.
Payback: what typically drives better results
- Higher daytime usage (or shifting usage into the day)
- Lower installed cost for the same performance
- Good roof conditions (minimal shading, suitable orientation)
- Smart tariff alignment (especially when combined with a battery)
When you’re ready, a dedicated payback tool can help you model scenarios. For now, compare your quote totals against the ranges above and ensure you understand the assumptions (generation, export, self-use).
VAT, SEG and grants
VAT on domestic solar and batteries
Domestic installations can have different VAT treatment depending on the current UK rules. Always confirm whether the quote includes VAT and what VAT rate has been applied to each component.
SEG (Smart Export Guarantee)
If you export unused solar electricity, SEG payments may apply via participating suppliers. SEG rates vary by supplier and tariff, so export income can be a bonus — but it should not be the only reason to buy solar.
For the “how and why” behind these assumptions, see our methodology page: How we calculate UK solar costs.
What to check in a solar quote (UK checklist)
Core specification
- System size (kW) and number of panels
- Panel model, efficiency, product warranty
- Inverter type (string/hybrid/micro-inverters) and warranty
- Expected annual generation (kWh) and assumptions
Installation and protections
- Scaffolding included?
- Bird protection / mesh included?
- Monitoring app / export meter details
- Workmanship warranty and clear aftercare process
Battery (if included)
- Battery usable capacity (kWh) and cycle/warranty information
- Backup capability (if required) and what it covers
- Future expandability (additional battery modules)
If you want more background on why these checks matter, read: How we calculate UK solar costs and learn more about the site on the About SolarCostsUK page.
Solar panel costs UK: FAQs
How much do solar panels cost for an average UK house?
Many average households consider a 4–5 kW system; costs vary, but quotes often fall within the mid-range band shown above, depending on roof access, equipment choice and install complexity.
Is a battery worth it with solar?
A battery can improve self-use, but value depends on usage patterns and tariff. If you export a lot of solar or use more power in the evening, a battery can make more sense — especially when paired with a smart tariff.
Do solar panels add value to a house?
They can improve running costs and appeal for some buyers, but value depends on system quality, documentation and how well the installation was done.
How do I compare solar quotes properly?
Compare system size, expected generation, equipment models, warranty terms and what’s included (scaffolding, monitoring, bird protection). Use the checklist above and read our methodology.
Need to ask something specific? Use the contact page.