How much do solar panels cost?
Solar Panel Cost

How much do solar panels cost?

Table of Contents

1. Introduction: Why Solar Matters Now

With energy costs still high and sustainability at the forefront, solar panels present a compelling investment. In 2025, they’re not just an eco-friendly choice—they’re becoming a smart financial move. Whether you’re a homeowner or just curious, here’s what you need to know today.

2. UK Solar Landscape: A Growing Power Source

  • Capacity & Reach: As of 2025, solar contributes about 5% of the UK’s electricity, with ~18.9 GW installed capacity (source).
  • Home Adoption: Around 1.8 million homes now have solar panels (source).

3. Cost Snapshot: What You’ll Pay in 2025

  • 4 kW system: £5,500–£7,000 installed (source)
  • 4.5 kW with battery: ~£9,800 (source)
  • 3 kW system: ~£6,022
  • 8-panel without battery: ~£4,990
  • + 5kWh battery: total ~£6,740 (source)

Costs have fallen ~4.5% per kW between 2024–2025 (source).

4. Value: Savings, Payback, and Added Benefits

  • Bill savings: Up to 70% with battery (source)
  • Payback: 6–15 years depending on usage and system size
  • Property value: Can increase by 6–16% (source)
  • CO₂ savings: 1 tonne/year (source)

solar panels cost. Men on roof installing solar panels 5. Support & Incentives

  • ECO4 scheme: Up to £10,000 in grants
  • Octopus + ECO scheme: Free solar/heat pumps for 1,000 households (source)
  • Solar Together: Council-run solar group savings (up to 50%)
  • VAT Relief: 0% on solar panels and battery installs
  • SEG: Sell excess power to the grid

6. Things to Consider Before Installing

  • Roof suitability: South-facing with a 30–40° pitch is ideal
  • Planning permission: Usually not required unless listed/conservation area
  • System size: Match to energy usage—most UK homes use 3–6kW systems
  • Maintenance: Minimal; panels last 25+ years
  • Plug-in systems: Balcony solar being reviewed (source)

7. Final Thoughts: Is Solar Right for You?

Solar panels in 2025 offer strong returns—financially and environmentally. If your roof is suitable and you can access a grant or install with VAT relief, the payback period is often just 6–11 years. Add in rising energy costs and it’s easy to see why millions of UK homeowners are making the switch.

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Expert, local installers

All installations are carried out by careful, caring, qualified MCS-accredited engineers.

Frequently Asked Questions

Do I need MCS certification for SEG?

Yes. You’ll need an MCS‑certified installation and an export‑capable meter. Keep your MCS certificate for SEG sign‑up.

Can I combine ECO4 with 0% VAT and SEG?

Yes — many households combine ECO4/LA Flex with 0% VAT and then earn through SEG.

How long is the payback period?

Typically 10–12 years, faster with a battery and high self‑consumption.

Do I need planning permission?

Most domestic rooftop solar is permitted development. Exceptions: listed buildings, flats, conservation areas — check locally.

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What our customers say

”I was thinking about getting solar for my home and stumbled upon www.solarplanet.uk. The site's super easy to get, breaking down all the solar jargon. After reading up for a bit, I filled out their quote form. The next day, I got calls and emails from three solar companies in South Wales. Chatted with all of them, got quotes, and went ahead with one. The whole experience was smooth, and all the companies seemed top-notch. Big thumbs up!

Caroline McleanCardiff Resident

”Running a business, those rising energy bills were starting to pinch. So, we thought, 'Why not try solar?' A quick online search led us to Solar Planet. Filling out their quote form was a breeze, and guess what! The very next day, three solar experts from Bristol gave us a shout. They were all super helpful and knew their stuff. Picking one was tough since they all had great offers. And a big relief! They all had this MCS accreditation – a real peace of mind with all those dodgy stories you hear these days.

Daniel JonesOn The Blink - Commercial Business in Bristol

”It couldn't have been easier! Initially, we were scratching our heads trying to find a trustworthy company. Then, thanks to a quick Google search by my husband, we landed on Solar Planet. He filled out their quote form, and the next day, three different solar installers rang us up. We've been over the moon with both the installation and the ongoing support. They guided us through the whole process from installation to helping us find the best energy provider for solar power.

Ceri BurkeSwansea Resident