Solar Panel Installation in the UK: What to Expect
Installing solar panels in the UK is a straightforward process when you use an MCS-certified installer. Most residential installations are completed in 1–2 days, and the grant process is handled largely by your installer. Here's everything you need to know, from getting quotes to cleaning your panels.
Last updated March 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
Quick Answer
Solar panel installation in the UK takes 1–2 days for a typical home. An MCS-certified installer handles everything: scaffolding, mounting, wiring, inverter setup, and DNO notification. The full process from quote to generating electricity takes 4–8 weeks including grant approval.
How are solar panels installed in the UK?
In the UK, solar panels must be installed by an MCS-certified company if you want to claim grants and export tariff payments. Here's the step-by-step process from start to finish:
“A well-installed solar PV system should last 25 years or more with minimal maintenance. The quality of the installation is as important as the quality of the panels themselves.”
Get quotes from MCS-certified installers
Contact at least 2–3 installers from the MCS certified installer database. They will assess your roof, recommend a system size, and provide a written quote. You should have a signed contract before proceeding.
Check available grants and incentives
Check what grants are available in your area and apply for the Smart Export Guarantee (SEG). You'll need your MPAN (from your electricity bill), postcode, and installer details.
Confirm your grant approval
If applying for a grant, wait for confirmation of your approval before proceeding with the installation. Make sure all paperwork is in order before your installer begins work.
Installation day (1–2 days)
Your installer mounts the panels on your roof using brackets, installs the inverter (usually in your attic or utility room), and connects everything to your consumer unit. A registered electrician handles all electrical works.
DNO grid connection
Your installer submits the G98/G99 application to your local DNO (Distribution Network Operator) to register your system for grid connection and export payments. Your DNO may install a smart meter if you don't have one.
EPC assessment
An accredited EPC Assessor visits your home after installation. The EPC certificate is published on the EPC Register. Cost: approximately £100–£300 (paid by you).
Grant payment
Your installer submits all documentation. The grant is paid directly to your bank account, typically within a few weeks.
What about planning permission?
Most residential solar panel installations in the UK are exempt from planning permission under permitted development rights. The panels must not protrude more than 200mm beyond the plane of the roof, not be higher than the highest part of the roof (excluding the chimney), and must not be installed on a listed building or in a conservation area without approval. Always check with your local planning authority if in doubt.
How long does solar panel installation take?
| Stage | Typical Duration |
|---|---|
| Getting quotes and choosing an installer | 1–3 weeks |
| Grant application and approval | Minutes to 2 weeks |
| Waiting for installation date | 2–8 weeks (depends on installer availability) |
| Physical installation | 1–2 days |
| DNO grid connection | 2–6 weeks |
| EPC assessment | 1–2 weeks to schedule |
| Total: quote to generating electricity | 6–16 weeks |
Timelines vary depending on installer availability, time of year, and DNO processing times. Summer is the busiest period for installers.
Can I install solar panels myself in the UK?
Technically you can install solar panels yourself, but it is strongly not recommended in the UK for several reasons. You will not qualify for the Smart Export Guarantee (SEG) payments. Only MCS-certified companies can complete eligible installations. You won't receive an MCS certificate, which is required for the G98/G99 grid connection application. Your home insurance may not cover damage from a non-professional installation, and manufacturer warranties may be voided.
What maintenance do solar panels need?
Solar panels require very little maintenance because they have no moving parts. In the UK, rainfall keeps panels mostly clean naturally. The main maintenance tasks are checking your monitoring app periodically to confirm normal output, cleaning panels once or twice a year if bird droppings or lichen accumulate, and having your inverter checked if output drops unexpectedly. Your inverter may need replacing once over the 25-year life of the system (typically after 10–15 years), at a cost of £800–£1,500.
Annual maintenance checklist
- ✓ Check monitoring app for any output drops or error codes
- ✓ Visual inspection of panels from ground level for debris or damage
- ✓ Clean panels if bird droppings or lichen are visible (soft brush + warm water)
- ✓ Check inverter display for any warning lights or error messages
- ✓ Confirm export meter readings match your supplier's records
How do you clean solar panels?
Solar panels in the UK require very little cleaning. UK rainfall does a good job of keeping panels clean naturally. However, if you notice a build-up of dirt, bird droppings, or lichen (common on north-facing edges), a periodic clean can improve output by 3–5%.
Do
- ✓ Use a soft brush or sponge with warm water
- ✓ Clean in the early morning or evening (cool panels)
- ✓ Use a garden hose at low pressure from ground level if accessible
- ✓ Clean once or twice a year if needed
- ✓ Consider a professional solar panel cleaning service
Don't
- ✗ Use a pressure washer (it can damage seals and cells)
- ✗ Use abrasive cleaners, scouring pads, or chemical solvents
- ✗ Walk on the panels
- ✗ Clean in the middle of a sunny day. Thermal shock can crack glass
- ✗ Climb on the roof unless you are trained and insured
Ongoing maintenance
Solar panels have no moving parts and require minimal maintenance. Check your monitoring app periodically to make sure output looks normal. Your inverter may need replacing once over the 25-year life of the system (after 10–15 years). Warranties cover panel defects for 25 years and performance degradation for 25–30 years.
Where can I buy solar panels?
In the UK, solar panels are almost always purchased as part of a supply-and-install package from an MCS-certified installer, not bought separately from a shop. This is important because:
- ✓ The Smart Export Guarantee (SEG) requires installation by an MCS-certified company
- ✓ 0% VAT applies to residential solar panel installations in the UK
- ✓ Your installer handles DNO registration, electrical certification, and grant paperwork
- ✓ Warranties are managed through the installer, who is accountable for the full system
How to find an installer
- ✓ Check the MCS certified installer database at mcscertified.com
- ✓ Get at least 2–3 quotes to compare pricing and equipment
- ✓ Ask about the specific panel brand, inverter, and warranty terms
- ✓ Use our free quote form to get connected with local registered installers
Buying panels separately online (e.g. from Amazon or trade suppliers) means you lose eligibility for the SEG, won't receive MCS certification, and take on the risk of installation yourself. It is not recommended for residential systems.
Frequently Asked Questions About Solar Panel Installation
How to install solar panels?
In the UK, solar panels are installed by MCS-certified companies. The process involves getting quotes, checking available grants, having the panels installed (1–2 days), completing an EPC assessment, and setting up your Smart Export Guarantee payments. Your installer handles the DNO grid connection and most paperwork.
How to clean solar panels?
Use a soft brush or sponge with warm water. Clean in the early morning or evening when panels are cool. Avoid pressure washers, abrasive cleaners, and chemical solvents. In the UK, rainfall keeps panels mostly clean, so you may only need to clean once or twice a year if bird droppings or lichen accumulate.
Do I need planning permission for solar panels?
Most residential solar panel installations in the UK are exempt from planning permission under permitted development rights. The panels must not protrude more than 200mm beyond the plane of the roof and must not be higher than the highest part of the roof (excluding the chimney). Listed buildings and properties in conservation areas may need separate permission from your local planning authority.
Where can I buy solar panels?
In the UK, solar panels are purchased as part of a supply-and-install package from an MCS-certified installer. This is required for the Smart Export Guarantee (SEG) and ensures 0% VAT. Check the MCS certified installer database at mcscertified.com and get at least 2–3 quotes to compare.
Related Guides
Sources
- MCS — Find a Certified Installer — mcscertified.com
- Ofgem — Smart Export Guarantee (SEG) — ofgem.gov.uk
- Planning Portal — Solar Panels Permitted Development — planningportal.co.uk
- Energy Networks Association — G98/G99 — energynetworks.org
John Rooney is the founder of Solar Info and has been covering the UK solar energy market since 2023. He fact-checks all content against official MCS and Ofgem data and maintains relationships with MCS-certified installers across the UK.
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