Solar Panel Cost UK — 2026 Price Guide
Honest, fully-installed solar PV prices for Devon homes from CHAS-approved electrical contractors. No salespeople, no inflated quotes — just real engineer pricing.
Quick answer
A typical UK 4kW solar PV system costs £5,500–£7,500 plus VAT fully installed. Domestic solar is currently zero-rated for VAT until March 2027, so the headline figure is what you pay.
2026 UK solar panel prices
| System size | Typical home | Panels | Installed price (plus VAT) |
|---|---|---|---|
| 3 kW | 1–2 bed | 7–8 | £4,500 – £6,000 |
| 4 kW | 3 bed | 10 | £5,500 – £7,500 |
| 5 kW | 3–4 bed | 12–13 | £6,500 – £8,500 |
| 6 kW | 4 bed | 14–15 | £7,000 – £9,500 |
| 8 kW | 5 bed / large | 18–20 | £9,500 – £12,500 |
| + 5 kWh battery | Any | — | + £4,000 – £5,500 |
| + 10 kWh battery | Any | — | + £5,500 – £7,000 |
All prices include MCS certification, scaffolding, DNO G99 notification, isolators, inverter, monitoring app and Smart Export Guarantee registration. Domestic VAT is currently 0%.
What affects the cost?
- Roof type and pitch — slate and rosemary tiles take longer than concrete
- Scaffolding access — terraced or 3-storey jobs need more scaffold
- Inverter brand — SolarEdge / Tesla / Sunsynk / GivEnergy all differ
- Battery capacity and chemistry (LFP lasts longer than NMC)
- EV charger integration and load-shifting controls
- Whether you need a consumer unit upgrade for export
Solar + battery savings in Devon
A well-sized 4kW system in South Devon typically generates 3,600–4,200 kWh/year. With a battery and an octopus-style import/export tariff, most homes save £900–£1,400/year off their electricity bill.
Free solar survey across Devon
No high-pressure sales call — just an electrician on your roof with a clipboard.
Frequently Asked Questions
How much do solar panels cost in the UK in 2026?
A typical 4kW domestic solar PV system costs £5,500–£7,500 plus VAT installed in Devon. A 6kW system runs £7,000–£9,500 plus VAT. Add £4,000–£7,000 plus VAT for a battery. All prices include MCS certification, scaffolding, DNO notification and a 25-year panel warranty.
How much are solar panels for a 3-bed house?
Most 3-bed homes fit a 4kW–5kW array (10–13 panels). Expect £5,500–£8,000 plus VAT fully installed including inverter, isolators, MCS sign-off and Smart Export Guarantee registration.
Is there VAT on solar panels in the UK?
Domestic solar PV and battery installations are zero-rated for VAT in the UK until 31 March 2027. Commercial installations are still subject to standard VAT.
How long do solar panels take to pay back?
With current electricity prices and a Smart Export Guarantee tariff, most Devon homes break even in 7–10 years. Adding a battery typically pays back in 9–12 years but doubles your self-consumption.
Do you install solar panels in Devon and Cornwall?
Yes — Grants Electrical Solutions Ltd installs solar PV, hybrid inverters and battery storage across Devon, Cornwall and Somerset. We are MCS-approved electrical contractors and CHAS accredited. Call 01626 374 059 for a free survey.