Thinking about going solar? Here's what it actually costs.
For most homeowners, the solar journey starts with one question: What's this going to cost me? It's a fair place to start. And while there's no single answer that fits every home, there's a lot more clarity available than most people expect.
Here's what shapes the price — and what the numbers actually look like in 2026.
What Determines the Cost of Solar Panels?
The price of solar panels isn’t one-size-fits-all. Several factors influence the total price:
Your home's energy needs
The starting point is usually system size. A typical three-bedroom home tends to need a 4–5 kW system, though this varies depending on how much electricity your household uses. Larger systems cost more upfront, but the cost per kilowatt often works out lower — so it's worth thinking about your actual usage rather than just defaulting to the smallest option.
The type of panels you choose
Higher-efficiency panels — monocrystalline being the most common example — generate more power from a smaller roof area. They cost more per panel, but can reduce how many you need and simplify the installation. Budget-friendly options exist, too; the right choice depends on your roof space and long-term goals.
Installation and labour
Labour typically makes up around 10% of the total cost. That figure rises if your roof is steep, multi-angled, or requires scaffolding. Listed buildings and conservation areas may also involve additional planning checks, which add time and cost.
Your roof itself
Orientation, pitch, shading, and roof type affect how many panels you need. Flat roofs, tiles, slate, or unusual shapes may increase costs slightly.
Batteries and add-ons
Adding battery storage means you can use more of the electricity your panels generate rather than sending it back to the grid. It increases the upfront spend, but improves long-term savings. Other extras — hybrid inverters, EV chargers, monitoring systems — each add to the total in ways worth discussing with your installer before you commit.
Where you live
Regional labour costs and the level of installer competition in your area both affect pricing. The good news: competition among installers has brought median prices down by around 19–21% for small to medium systems in 2024–2025.
Current government incentives
VAT on solar panel installations is currently 0%, and this is in place until 2027. That's a meaningful saving on what would otherwise be a 20% addition to your bill. Group buying schemes, like Switch Together, can also help households access better pricing through economies of scale. And depending on your circumstances, national or local grant programmes may reduce the cost further.
Global market factors
Panel prices have fallen significantly over recent years as supply chains stabilised and manufacturing capacity expanded. Short-term fluctuations in materials or shipping can still cause minor price movements, but the overall trend has been downward.
Average Costs in the UK (2026 Estimates)
Based on MCS Dashboard data for standard domestic installations:
| Region |
Avg Installation Cost |
Avg Cost per kW |
| England |
£8,373 |
£1,659 |
| Scotland |
£7,628 |
£1,766 |
| Wales |
£7,187 |
£1,559 |
| Northern Ireland |
£7,475 |
£1,256 |
These figures reflect average domestic installations. If your roof is more complex, your quote may sit above these numbers — and if you're working with a straightforward setup, it could come in below.
If you'd like to explore how quickly solar could pay for itself in your home, our guide on calculating your ROI and payback period walks through the numbers step by step.
A few things worth keeping in mind
These averages are a useful reference, but they're not your quote. The best way to understand what solar will cost for your home is to get a survey and installation quote based on your actual roof, energy usage, and location.
At Switch Together, we help you understand what to expect at each stage — from what goes into a quote to how to compare proposals from different installers. Register your interest in our group buying scheme today — we'll keep you informed as things develop and help you understand exactly what solar could cost for your home.
