Are Solar Panels Worth It? Expert Answers & Costs 2026

Are solar panels worth it in 2025? This question tops many UK homeowners' searches, and the answer involves costs, savings, and planning rules. We asked Carl Hogg, managing director at Good Energy, to clarify everything from installation to payback periods.

How Much Do Solar Panels Cost?

Hogg advises budgeting £6,000 to £14,000 for a complete solar array, which includes panels, inverters, and optional battery storage. Costs vary based on property size, energy needs, and system design.

“We typically go out to every single property and do a full survey,” Hogg explains. A bespoke design ensures you pay only for what you need, avoiding oversizing or undersizing.

What Affects Solar Panel Pricing?

• Number of panels and total wattage
• Inverter quality and type (string vs. microinverters)
• Battery storage capacity
• Roof complexity and installation difficulty
• Labour and scaffolding costs

How Many Solar Panels Do I Need?

“It depends on the size of the house, the energy consumption, how many people live there and how they use electricity,” says Hogg. A typical 10-panel system supplies 30-50% of a household's electricity – essentially free energy from the sun.

Adding a battery can push that figure much higher, letting you store excess daytime generation for evening use. This reduces grid reliance and boosts long-term savings.

Solar Panel Sizing Table

Do You Need Planning Permission for Solar Panels?

In most UK cases, solar panels are considered permitted development, meaning no planning permission is required. However, exceptions exist for listed buildings, conservation areas, or if panels protrude more than 200mm from the roof.

Always check with your local council before installation. Hogg notes that reputable installers handle this paperwork and advise on compliance, making the process smoother.

Are Solar Panels Worth It Financially?

With energy prices rising, solar panels can pay for themselves in 10-15 years on average. Government schemes like the Smart Export Guarantee (SEG) pay you for surplus energy sold back to the grid, improving returns.

Battery storage adds upfront cost but increases self-consumption, cutting bills by up to 70%. Combined with a heat pump or EV charger, solar becomes even more valuable. The background to this story is set out in Flexible Solar Panels: 0.85mm Thin and Stick Anywhere.

• Average payback period: 10-15 years
• Lifespan: 25-30 years
• Increase home value by up to 4%
• Reduce carbon footprint significantly

Key Takeaways

• Budget £6k-£14k for a full solar array
• 10 panels typically cover 30-50% of electricity use
• Planning permission rarely needed for standard roofs
• Batteries boost savings but add cost
• SEG payments provide extra income

FAQ

Ultimately, solar panels are a smart long-term investment for most UK homes. With expert guidance and proper sizing, you can cut bills, earn from excess energy, and boost property value.

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