Reducing Business Electricity Costs: Electrical Upgrades Commercial Sites Should Prioritise

Business electricity costs remain a serious concern for UK companies. For many commercial sites, the pressure is not only the unit cost of electricity. It is also the amount of energy being wasted by outdated lighting, poor controls, ageing equipment, inefficient cooling, weak maintenance and electrical systems that have not been reviewed for years.

For facilities teams, landlords, schools, hospitality venues, offices and managed commercial properties, the question is practical:

Where should we start?

Not every business can commit to major capital upgrades straight away. Solar PV, heat pumps and full building refurbishments may be valuable, but many sites can make meaningful progress by reviewing the electrical systems they already use every day.

At Azure Electrical Ltd, our electrical services, electrical installation, statutory compliance, electrical remedial work and mechanical services support commercial clients looking to reduce waste, improve reliability and plan upgrades properly.

This guide explains which electrical upgrades can help reduce business electricity costs and how to prioritise them.

Why Electricity Costs Should Be Treated as a Building Services Issue

Electricity costs are often discussed as a supplier or tariff problem. That matters, but it is only part of the picture.

A commercial building can waste electricity through:

• Outdated lighting

• Lights left on in unused rooms

• Poor heating and cooling controls

• Air conditioning running out of hours

• Ventilation systems operating unnecessarily

• Old plant and controls

• Inefficient refrigeration

• Equipment left on overnight

• Poor zoning

• Damaged or unreliable electrical infrastructure

• Reactive maintenance instead of planned review

The building may appear to be operating normally while energy is being wasted every day.

That is why electrical and mechanical systems should be reviewed together. Energy reduction is not only about replacing equipment. It is about understanding how the building is used, where demand occurs and which systems are running when they do not need to.

Start With a Practical Electrical Energy Review

Before spending money on upgrades, businesses should understand what is already installed.

A practical electrical energy review should look at:

• Existing lighting types

• Lighting controls

• Distribution boards

• High-use circuits

• HVAC electrical supplies

• Control panels

• Refrigeration equipment

• Out-of-hours operation

• Planned future loads

• Previous fault history

• Maintenance records

• Areas with high occupant complaints

This does not need to become a full building redesign. The aim is to identify the obvious waste, the highest-use systems and the upgrades most likely to make a practical difference.

For many commercial buildings, the best first steps are LED lighting, smarter controls, better maintenance, improved zoning and a review of electrical capacity before larger investments.

1. Upgrade Old Lighting to LED

Lighting is often one of the clearest electrical upgrade opportunities.

Older fluorescent, halogen or inefficient fittings can use more energy than necessary and create more maintenance demand. LED lighting can reduce electricity use, improve visibility and make the building easier to maintain.

A commercial LED upgrade should consider:

• Existing fitting types

• Lighting levels

• Operating hours

• Emergency lighting integration

• Colour temperature

• Glare

• Controls

• Zoning

• Maintenance access

• Out-of-hours installation

The best projects do not simply swap fittings. They review how each space is used and specify lighting that supports both efficiency and comfort.

Azure’s electrical installation service can support commercial LED upgrades, lighting alterations, new circuits and installation works.

Related article: LED lighting and EPC ratings

2. Add Lighting Controls

LED fittings help, but controls often unlock more savings.

Even efficient lights waste energy if they are left on unnecessarily.

Useful controls may include:

• Occupancy sensors

• Absence detection

• Daylight dimming

• Timed switching

• External lighting photocells

• Corridor controls

• Zoning by area

• Scene controls for meeting rooms or venues

Controls are especially useful in:

• Meeting rooms

• Toilets

• Corridors

• Store rooms

• Staff welfare areas

• Back-of-house spaces

• Classrooms

• Plant rooms

• External routes

For many businesses, lighting controls are a lower-disruption upgrade that can be phased around normal operations.

The UK Government’s Approved Document L 2026 supports energy-efficiency requirements for buildings and fixed building services, which makes lighting and controls a sensible part of commercial energy planning.

3. Review Heating and Cooling Controls

Heating and cooling systems can waste significant electricity when controls are poorly set up.

Common issues include:

• Air conditioning running after closing

• Heating starting too early

• Cooling and heating operating in the same area

• Staff overriding thermostats

• Weekend settings being left active

• Old time schedules no longer matching occupancy

• Sensors located in the wrong place

• Poor zoning

• Controls not updated after layout changes

A controls review should check how the building actually operates.

For example, an office may have meeting rooms that are only used for short periods. A pub or club may have peak cooling demand at night. A school may need different controls during term time and holidays.

Azure’s control panel services, heating services, air conditioning services and ventilation services can support commercial sites that need more reliable and better-managed building controls.

Related article: Smart thermostats and building controls

4. Stop Heating and Cooling From Fighting Each Other

One of the most common forms of hidden energy waste is heating and cooling conflict.

This can happen when separate systems serve the same area without coordination. The building may feel comfortable, but energy is being wasted because one system is heating while another is cooling.

Facilities teams should check:

• Are heating and cooling set points overlapping?

• Are controls managed by different teams?

• Are thermostats placed correctly?

• Have room layouts changed?

• Are users overriding settings?

• Are time schedules still accurate?

• Are plant controls clearly labelled?

Fixing control conflicts may not require full equipment replacement. In some cases, better commissioning, scheduling, labelling and maintenance can reduce unnecessary operation.

5. Service Air Conditioning Before It Works Hardest

Air conditioning can become expensive when it is poorly maintained or running inefficiently.

A planned service can identify:

• Dirty filters

• Blocked coils

• Weak airflow

• Outdoor unit obstructions

• Noisy fans

• Condensate issues

• Refrigerant concerns

• Poor controls

• Units running outside operating hours

• Areas with repeated comfort complaints

For systems over 12kW, businesses should also understand whether TM44 air conditioning inspection requirements apply. GOV.UK explains that air conditioning systems with an effective rated output over 12kW must be inspected by an energy assessor at least every five years.

Official reference: GOV.UK air conditioning inspections in buildings

Azure’s air conditioning services can support planned servicing, fault investigation, reporting and remedial recommendations.

Related article: Air conditioning and EPC ratings

6. Review Ventilation Operating Hours

Ventilation is essential for many commercial buildings, but systems should still be controlled properly.

Ventilation may waste energy if it runs:

• Outside occupied hours

• In unused rooms

• At constant speed when demand varies

• With dirty filters

• With poor control settings

• Without a clear maintenance schedule

• After layout or occupancy changes

Facilities teams should review whether ventilation schedules reflect how the building is actually used.

HSE guidance on ventilation in the workplace explains the importance of adequate workplace ventilation. The key for commercial sites is to balance adequate ventilation with sensible control and maintenance.

Azure’s ventilation services can support planned maintenance, fault investigation, filter checks and reporting.

7. Check Refrigeration and Cold Room Efficiency

For hospitality, food service, retail and commercial premises with cold storage, refrigeration can be a major electrical load.

Energy waste can come from:

• Damaged door seals

• Poor temperature settings

• Dirty condensers

• Faulty controls

• Poor airflow

• Overfilled units

• Equipment running constantly

• Lack of maintenance

• Older inefficient systems

Refrigeration problems can affect both energy bills and business operation.

Azure’s refrigeration and cold rooms service can support commercial sites that need reliable cooling, maintenance and linked electrical support.

8. Use Metering and Monitoring to Find Waste

Many businesses know their electricity bills are high but do not know where the electricity is being used.

Metering and monitoring can help identify:

• Out-of-hours usage

• High-demand equipment

• Seasonal demand patterns

• Areas using more energy than expected

• Lighting or plant left running

• Changes after upgrades

• Peak demand periods

• Tenant or zone usage

For multi-site or multi-tenant buildings, clearer monitoring can also support better reporting and budgeting.

Energy monitoring does not reduce consumption by itself, but it gives facilities teams the information they need to make better decisions.

9. Review Electrical Capacity Before Adding New Loads

Many businesses are considering EV charging, heat pumps, solar PV, battery storage, upgraded air conditioning or additional equipment.

These can all be useful, but they add complexity to the building’s electrical infrastructure.

Before adding new loads, facilities teams should review:

• Incoming supply capacity

• Distribution boards

• Existing maximum demand

• Spare capacity

• Cable routes

• Protective devices

• Earthing arrangements

• Load management options

• Future expansion plans

• Existing documentation

If a business adds new systems without reviewing capacity, it may create unnecessary risk, cost or disruption.

Azure’s related guides include:

• EV charging infrastructure and electrical capacity

• Commercial heat pump electrical requirements

• Commercial solar panel readiness

10. Keep Electrical Compliance in the Plan

Energy-saving upgrades still need to be safe, compliant and documented.

Commercial electrical work should be properly designed, installed, inspected and tested.

Azure Electrical Ltd references BS 7671 as a major standard when carrying out electrical work, alongside relevant regulations, manufacturer guidance and site-specific requirements.

Official reference: IET BS 7671 Wiring Regulations

Azure has also published a guide on BS 7671 Amendment 4 and what businesses need to know.

For facilities teams, the important point is simple: do not let energy-saving works become undocumented alterations. Certificates, records, reports and remedial recommendations all matter.