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Commercial Electrical Expertise for Businesses in Southampton, Portsmouth, Winchester, Eastleigh, the New Forest & Along the South Coast

As experienced commercial electricians, Southampton’s Knights Electrical & Plumbing handle everything from small office fitouts to the maintenance of complex industrial power systems. Our commercial electrical services are called upon by a truly diverse range of clients, from retailers and hospitality venues in Portsmouth to those operating manufacturing facilities and warehouses in Winchester to schools and colleges in Eastleigh and the New Forest.

Trust our team to ensure your electrical systems are safe, efficient, and built to last via the following services:

  • Full and partial rewires tailored to your building’s needs
  • Emergency lighting installation and repairs
  • CCTV and security system installation and maintenance
  • Fire alarm installation compliant with BAFE SP203-1 and BAFE SP203-4 standards
  • Electrical design and planning for new builds and refurbishments

Choosing Knights Electrical & Plumbing means choosing commercial electricians who are not just reactive problem solvers, but proactive partners in keeping your premises safe and fully operational. NAPIT accredited and holding Safe Contractor status, we ensure all work is compliant with the latest IET Wiring regulations and BS 7671.

Commercial Installations That Work as Hard as You Do

Our commercial installations are designed to keep your business powered, productive, and protected. We manage everything from consumer unit upgrades and bespoke electrical design to installing door entry systems, CCTV networks, and energy-efficient lighting.

If you’re setting up a new site or upgrading existing infrastructure, our team ensures every project is delivered on time, on budget, and to the highest safety standards. We use the latest materials and technology to future-proof your installation, helping to reduce running costs and downtime.

Typical commercial installations we undertake include:

  • Electrical distribution boards and control systems
  • Data cabling and structured wiring solutions
  • Intruder alarms, fire alarms, and emergency lighting
  • Specialist power supplies for manufacturing or catering equipment

24/7 Reactive Maintenance & Repairs

When something goes wrong, you need commercial electrical repairs you can count on—fast. Our 24/7 call-out service extends across Southampton, Portsmouth, Winchester, Eastleigh, the New Forest, and all surrounding locations, meaning we’re always ready to get your business back online.

From emergency lighting failures and power outages to security system malfunctions, our commercial electricians have the tools, parts, and expertise to resolve issues quickly. We diagnose faults efficiently, carry out on-the-spot repairs where possible, and provide clear recommendations for any further work required.

We know downtime costs money, so our focus is always on getting your systems safe and operational as quickly as possible.

Planned Preventative Maintenance for Businesses

Planned preventative maintenance is the smart way to avoid costly breakdowns and keep your electrical systems in top condition. Our commercial electrical services include scheduled inspections, testing, and reporting tailored to your site and industry regulations.

We assess every part of your installation—from lighting and emergency systems to distribution boards and specialist equipment—to ensure compliance and performance. This approach not only improves safety but can extend the life of your electrical assets and reduce unexpected repair bills.

Our PPM services typically include:

  • Regular inspection and electrical testing schedules
  • Detailed electrical reports for compliance and insurance
  • Servicing of fire alarms, intruder systems, and emergency lighting
  • Load testing and energy efficiency checks

FAQs – Commercial Electrical Services

Do you offer out-of-hours commercial electrical repairs?

Yes, we do. Our team is available 24/7 for urgent commercial electrical repairs in Southampton, Portsmouth, Winchester, the New Forest and their surrounds.

Can you handle large-scale commercial installations?

Absolutely. We regularly deliver full fit-outs, rewires, and complex commercial installations for offices, warehouses, retail units, and more.

How often should I schedule planned preventative maintenance?

It depends on your building use and systems. Many businesses opt for quarterly or bi-annual inspections to stay compliant and avoid breakdowns.

Are your electricians fully qualified?

Our commercial electricians are NAPIT accredited, Safe Contractor approved, and bring decades of combined expertise to every project.