PV Design Specialists

Expert
Solar PV
Design

Professional PV system design and grid application services for domestic and commercial installations backed by 25 years of electrical engineering expertise.

Request a Design Our Services
25+
Years Experience
∞
Unlimited Revisions
G99
Application Service
What We Do

Our Services

From initial design to grid connection we handle every stage of your solar PV project with precision and expertise.

Domestic PV Design

Full system design for residential rooftop and ground-mount installations up to 10kWp, including detailed design reports and single line diagrams.

Rooftop & Ground Mount

Commercial PV Design

Comprehensive design solutions for commercial projects of any size. We deliver optimised designs for large-scale rooftop and ground-mount arrays with no upper limit on system size.

Unlimited MWp

String & Optimised Systems

We design both conventional string inverter systems and micro-inverter or power optimiser solutions, selecting the most suitable technology for your site conditions.

String & Optimised

G99 Applications

Full preparation and submission of G99 grid connection applications. We manage all DNO communications and provide ongoing support until your connection offer letter is received.

DNO Applications

Solar Consultancy

Independent consultancy advice on existing solar installations, performance issues, system assessments and optimisation strategies for any scale of project.

Expert Advice

Framework Projects

Experienced in delivering multiple projects across top-tier client frameworks, consistently achieving minimal feedback and exceeding quality expectations.

Top-Tier Clients
PV System Design
25
Years
Expertise
Why Choose Us

Engineering
Excellence

We bring decades of electrical engineering experience to every project, ensuring your solar system is designed to perform.

Design Software

Industry-Leading Tools

Every design is produced using the most trusted simulation software in the solar industry, ensuring accuracy and bankability.

PVsol

Industry-standard 3D PV planning software used for precise yield simulation, shading analysis and detailed system design with full visualisation capabilities.

3D Simulation Shading Analysis Yield Reports
PVsyst

The globally recognised standard for bankable solar energy yield assessments. Produces detailed performance reports accepted by lenders, investors and planning authorities worldwide.

Bankable Reports Energy Simulation Commercial-Grade
Get In Touch

Request a
Quote

Ready to start your project? Get in touch and we'll come back to you promptly with pricing and timescales.

Email
enquiries@colwallenergy.co.uk
Coverage
UK-Wide – Domestic & Commercial
Turnaround
Fast turnaround with unlimited revisions