SolarSolar Panel Costs in 2026 — UK Price Guide
Updated March 2026. What you will actually pay for a residential solar panel system in the UK, broken down by size, region, and roof type.
How Much Do Solar Panels Cost in 2026?
The cost of solar panels in the UK has fallen by over 60% in the last decade. In 2026, a fully installed residential system typically costs between £4,500 and £11,000, depending on the system size and your location. All prices below include panels, inverter, mounting hardware, scaffolding, and installation by an MCS-certified installer.
Since April 2022, residential solar panels have benefited from 0% VAT, which is currently set to continue until at least March 2027. This saves roughly £1,000–£2,000 compared to the old 5% rate.
Cost by System Size
| System Size | Number of Panels | Typical Cost (Installed) | Best For |
|---|---|---|---|
| 3kW | 7–8 panels | £4,500 – £6,000 | 1–2 bedroom home, low–medium usage |
| 4kW | 10–12 panels | £5,500 – £8,000 | 3 bedroom home, average usage |
| 5kW | 12–14 panels | £6,500 – £9,500 | 3–4 bedroom home, above-average usage |
| 6kW+ | 15–18 panels | £7,500 – £11,000 | 4+ bedroom home, EV, heat pump, or high usage |
Prices include VAT at 0% (current rate). Based on standard roof-mount installations in 2026.
What Affects the Price of Solar Panels?
Two households getting the same size system can pay very different amounts. The main factors that push price up or down are:
Roof Type and Access
A simple south-facing pitched roof is the cheapest to install on. Flat roofs need angled mounting frames (add £300–£800). Slate or tile removal for integrated panels costs more than on-top mounting. If your roof needs reinforcing or has multiple levels, expect scaffolding costs to increase by £200–£500.
Scaffolding
Scaffolding is included in most quotes but can vary significantly. A standard two-storey semi costs around £300–£500 for scaffolding. Three-storey properties, dormer roofs, or restricted access can push this to £800–£1,200.
Inverter Type
A string inverter (one central unit) is the cheapest option and works well when panels face the same direction. Microinverters (one per panel) cost 20–30% more but are better for roofs with partial shading or multiple orientations. They also allow per-panel monitoring and tend to have longer warranties (25 years vs 10–15 years for string inverters).
Panel Brand and Efficiency
Budget panels from lesser-known manufacturers start around £100–£150 each. Premium brands like SunPower, LG, or REC cost £200–£350 per panel but offer higher efficiency (21–22% vs 18–19%), better degradation warranties, and often last longer. For smaller roofs, higher-efficiency panels can generate more power from less space.
Regional Price Variation
Installation costs vary across the UK. London and the South East are the most expensive due to higher labour and scaffolding costs.
| Region | 4kW System Cost | Relative to Average |
|---|---|---|
| London | £7,000 – £9,000 | +10–15% above average |
| South East | £6,500 – £8,500 | +5–10% above average |
| South West | £6,000 – £7,800 | Around average |
| Midlands | £5,500 – £7,500 | Around average |
| North West | £5,200 – £7,000 | -5–10% below average |
| North East | £5,000 – £6,800 | -5–10% below average |
| Scotland | £5,200 – £7,200 | Around or below average |
| Wales | £5,300 – £7,300 | Around average |
Price Trends: How Costs Have Fallen
In 2010, a 4kW residential solar system cost around £16,000–£20,000. By 2020, prices had dropped to £6,000–£8,000. In 2026, the same system costs £5,500–£8,000 — a reduction of over 60% in real terms.
The main drivers of this price drop are cheaper silicon cells, improved manufacturing, increased competition among installers, and the removal of VAT. Prices are expected to continue falling slowly, but the current 0% VAT rate is the biggest single saving and may not last beyond 2027.
Meanwhile, electricity prices have risen sharply. The average UK electricity rate is now around 24.5p/kWh (Ofgem cap, Q1 2026), making solar self-consumption more valuable than ever. This combination of lower system costs and higher electricity prices means the payback period is shorter than at any point in UK solar history.
Is It Worth Adding a Battery?
A solar battery adds £2,500–£10,000 to the total cost but can increase self-consumption from around 50% to 80%. Whether it is worth the extra cost depends on your usage pattern — batteries benefit households that use most of their electricity in the evening. Read our full battery storage guide.
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How to Get the Best Price
The single most important step is to get at least 3 quotes from different MCS-certified installers. Prices can vary by 20–30% for the same system. Other tips:
- Ask whether the quote includes scaffolding, building control notification, and DNO application
- Check if the inverter has a 10+ year warranty (some only offer 5 years)
- Do not necessarily choose the cheapest — check the installer’s MCS certification and reviews
- Consider whether microinverters are worthwhile for your specific roof layout — see our guide to how solar panels work for more on inverter types
- Ask about finance options — many installers offer 0% finance over 3–5 years
Use our solar savings calculator to estimate your returns based on your specific system size and location, or enter your postcode for local pricing data.
Related Guides
All solar guides • Are solar panels worth it? • Battery storage guide • Grants & incentives • Smart Export Guarantee • Choosing an installer • How solar panels work
Check your postcode for local solar costs → • Best areas for solar
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