Install solar panels.

Most UK installations now benefit from 0% VAT on energy-saving materials, making this an ideal time to invest. Beyond the immediate bill savings, a well-installed system adds tangible value to your home and allows you to sell excess energy back to the grid via the Smart Export Guarantee (SEG).

What Does the Work Involve?

• Site Survey: An assessment of your roof orientation, pitch, and structural integrity, alongside a shading analysis using specialist software.
• Scaffolding: Installation of safe access platforms, which is a legal requirement for most roof-level work in the UK.
• Roof Preparation: Fixing mounting brackets to the rafters; this may involve temporarily lifting tiles or slates to ensure a watertight seal.
• Mounting & Railing: Attaching the aluminium rail system that provides the framework for the solar modules.
• Panel Installation: Securely fixing the photovoltaic (PV) panels to the rails and connecting them in "strings."
• Electrical Integration: Routing DC cables into the loft or utility space to the inverter, which converts the power to AC for home use.
• Battery Storage (Optional): Installing a battery system to store surplus energy for evening use.
• Commissioning: Testing the system, notifying the Distribution Network Operator (DNO), and setting up monitoring apps.

Typical Costs

The total cost is primarily influenced by the quality of the inverter (string vs. micro-inverters) and the complexity of the roof. Scaffolding costs can also rise significantly if your home is more than two storeys high or has difficult access.

How Long Does It Take?

• Scaffolding Setup: 2–4 hours, usually done a day or two before the main installation.
• Standard 4kW Installation: 1 full day for a team of two installers and an electrician.
• Complex or Large Systems: 2–3 days if adding significant battery storage or complex mounting.
• DNO Paperwork: 1–8 weeks (mostly administrative background work after the physical install).

DIY or Professional?

Solar installation is not a DIY project. While a competent DIYer might physically mount a panel, the electrical work must be certified to comply with UK Building Regulations (Part P) and IET Wiring Regulations.

To access the Smart Export Guarantee (SEG) payments and ensure your home insurance remains valid, the system must be installed by an MCS-certified professional.

Choosing the Right Tradesperson

• Certifications: Ensure they are MCS Certified (Microgeneration Certification Scheme). This is non-negotiable for grid-connected systems.
• Consumer Codes: Check if they belong to RECC (Renewable Energy Consumer Code) or HIES (Home Insulation & Energy Systems Quality Assured Council).
• Red Flags: Be wary of "doorstep" salesmen, companies that won't provide a site survey, or quotes that seem significantly lower than the market average.

Questions to ask:

• Are you MCS certified and can I see your registration number?
• Does the quote include scaffolding and bird proofing?
• What is the expected "payback period" based on my specific roof orientation?
• Which inverter brand do you use, and what is its warranty?

UK Regulations

• Planning Permission: Usually falls under "Permitted Development," but you must check if you live in a Conservation Area or a Listed Building.
• Building Regulations: The roof must be checked for structural integrity to handle the "dead load" of the panels and wind uplift.
• DNO Notification: Your installer must notify the local grid operator (DNO). Systems over a certain size (G99) require permission before installation.
• MCS Certificate: You will receive this after the job is finished; it is your "proof" of a quality installation for future house sales.

Common Problems

• Pigeon Infestation: Birds love the warmth under panels. Always insist on bird mesh during the initial install to avoid expensive retrofitting.
• Shading Issues: Even a small amount of shade from a chimney or tree can "choke" a whole string of panels. Use optimisers or micro-inverters to mitigate this.
• Poor Roof Condition: Installing panels on a roof that needs replacing in 5 years is a costly mistake. Always repair the roof first.
• Inverter Placement: Inverters can get hot and hum slightly. Avoid placing them in bedrooms; a cool garage or loft is usually better.

Frequently Asked Questions