How to Install Solar Panels
Author: Steve Fairless
Date Published: 24th December 2023
A Complete Guide to Installing Solar Panels in the UK
Installing solar panels is one of the most effective ways to reduce household energy costs, improve energy independence, and lower carbon emissions. However, a successful installation requires careful planning, professional expertise, and compliance with UK regulations.
This guide explains the full solar installation process — from initial assessment and system design to commissioning and ongoing maintenance — so you understand exactly what’s involved when switching to solar.
Understanding Modern Solar Systems
A modern solar PV system consists of several integrated components working together to generate, store, and manage electricity:
• High-efficiency solar panels
• Hybrid or string inverter
• Optional battery storage system
• Mounting framework
• Safety isolators and cabling
• Monitoring and control software
Most UK homes now install systems that integrate with
solar battery storage
to maximise self-consumption and reduce reliance on the grid.
Types of Solar Panels
Residential installations in the UK primarily use high-performance monocrystalline panels, including N-Type, TOPCon, and HJT technologies. These provide:
• Higher output in low-light conditions
• Better temperature efficiency
• Longer performance warranties
• Slower long-term degradation
This makes modern panels far more productive than older-generation systems.
Pre-Installation Assessment
Roof & Property Survey
Every professional installation begins with a detailed site assessment. Installers evaluate:
• Roof orientation and pitch
• Shading from buildings or trees
• Structural condition
• Available mounting area
• Electrical supply capacity
South-facing roofs deliver maximum output, but east-west systems also perform extremely well in the UK climate.
Learn more here:
How Many Panels Can Fit on My Roof?
System Design & Yield Modelling
Using specialist software, installers calculate:
• Annual generation forecasts
• Expected self-consumption rates
• Battery optimisation
• Export potential
• Payback projections
This ensures the system is tailored to your usage patterns and property characteristics.
Legal & Regulatory Requirements
Planning Permission
Most domestic systems fall under permitted development. However, permission may be required for:
• Listed buildings
• Conservation areas
• Ground-mounted arrays
• Flat roof systems with high profiles
More information:
Planning Permission Guide
Grid Connection & Certification
All UK systems must comply with:
• MCS certification
• DNO G98 / G99 regulations
• BS 7671 wiring standards
• Building Regulations Part P
Certified installers manage all notifications and paperwork on your behalf.
Professional Installation vs DIY
While DIY installations exist, they are rarely suitable in the UK because:
• SEG payments require MCS certification
• Grid approval is mandatory
• Insurance may be invalidated
• Electrical risks are significant
• Warranties may be voided
Professional installation ensures compliance, safety, and long-term reliability.
Step-by-Step Installation Process
1. Site Preparation
Installers erect scaffolding and carry out roof safety checks. Roof fixings and weatherproofing points are prepared to prevent future leaks.
2. Mounting System Installation
Aluminium rails are fixed to rafters or structural supports. These form the base for panel mounting and ensure wind and snow load resistance.
3. Panel Installation
Panels are positioned, aligned, and secured using manufacturer-approved clamps and brackets.
4. DC Electrical Wiring
Panels are connected in strings using DC cabling routed safely into the building through weather-sealed entry points.
5. Inverter & Battery Installation
The inverter and battery system are installed in a ventilated location such as a garage, utility room, or loft space.
They control power conversion, storage, export, and grid interaction.
6. AC Connection & Consumer Unit Integration
The system is connected to the household consumer unit using dedicated circuits, isolators, and surge protection.
7. System Testing & Commissioning
Engineers perform:
• Insulation resistance tests
• Earth continuity checks
• Inverter configuration
• Export limit settings
• Performance verification
You then receive all certification and documentation.
Post-Installation Setup
Monitoring & App Configuration
Most systems include mobile apps that allow you to:
• Track live generation
• Monitor battery charge
• View export data
• Analyse savings
This helps optimise usage patterns and maximise returns.
Ongoing Maintenance
Solar systems require minimal maintenance, but best practice includes:
• Visual inspections annually
• Panel cleaning every 2–3 years
• Inverter health checks
• Firmware updates
Find out more:
Solar Servicing Guide
Financial & Environmental Benefits
A properly installed system delivers:
• 30–40% self-consumption (no battery)
• 60–85% self-consumption (with battery)
• 25+ years of savings
• Protection from energy inflation
• Reduced CO₂ emissions
Export payments are available through the
Smart Export Guarantee.
Choosing the Right Installer
A high-quality installation depends on selecting an experienced, accredited installer.
Look for:
• MCS certification
• NICEIC/NAPIT registration
• Proven case studies
• Transparent warranties
• Strong customer reviews
SUS Energy provides certified installations across the North East, including:
Newcastle,
Sunderland,
Durham and surrounding areas.
Installing solar panels is a structured, regulated process designed to ensure long-term performance, safety, and financial returns.
With professional design, certified installation, and modern technology, solar delivers one of the most reliable home energy investments available in the UK.
For a tailored assessment, contact Sustainable Energy Engineering on 0191 340 7001 or request a quotation online.
