Most electrical equipment in the UK is designed around 230V, but many sites receive supply voltage above that level. Sustained over-voltage can increase losses, heat and wear, contributing to higher energy cost.
Voltage Optimisation (VO) is a transformer-based technology that reduces incoming voltage to the ideal operating level, helping your building use only the electricity it actually needs – no more, no less.
By supplying equipment with the correct voltage, VO improves efficiency, reduces power consumption, cuts maintenance costs and helps extend asset lifespan. The technology also supports carbon reduction by lowering your overall kWh usage.
Voltage optimisation is ideal for organisations looking to reduce energy use, protect equipment and improve power quality with minimal disruption.
We focus on evidence-based VO projects that are technically robust, financially justified and tailored to your site’s electrical needs.
We measure incoming voltage and key loads over time, identify voltage-sensitive equipment such as lighting, motors, HVAC and IT/UPS systems, and review existing transformers, tap settings and any voltage-management hardware. Using real site data, we estimate potential savings and operational impacts with confidence.
We determine whether transformer tap adjustments, fixed VO, dynamic VO or a hybrid approach is most suitable. We specify equipment that fits your electrical infrastructure and operational requirements, model savings and payback clearly, highlight any risks, and plan installation around maintenance windows to minimise disruption.
We coordinate installation with your electrical contractors or trusted partners, commission the system and verify correct operation. Savings are validated using before-and-after data and recognised measurement methods, and full documentation is provided for asset registers, insurance and compliance.
Lower voltage means equipment draws only the power it needs, reducing total energy usage and lowering bills.
Optimising load profiles reduces site demand charges - particularly valuable for large energy users.
Less demand on the system lowers reactive power requirements, helping reduce associated billing costs.
Running equipment at the correct voltage reduces overheating, stress and electrical wear — leading to fewer failures and reduced maintenance spend.
Reducing incoming voltage to the optimal level cuts unnecessary kWh usage and lowers your electricity bills.
Correct voltage reduces heat, stress and electrical wear, helping machinery, lighting and HVAC systems run more efficiently and last longer.
Lower peak demand (kVA) and reduced reactive power charges contribute to a fast return on investment, often within 2–3 years.
Using only the voltage you need decreases overall energy consumption, helping reduce CO₂ emissions and support sustainability goals.
Voltage optimisation lowers incoming supply voltage to the ideal level for your equipment. Many UK sites receive more voltage than they need. By trimming this to an efficient band, the system reduces wasted energy, cuts heat, and helps plant run more smoothly. As a result, you see lower consumption and better asset life.
Actual results depend on your load profile, but typical sites see meaningful reductions in kWh, often in the mid single to low double digit range. Lighting, motors, refrigeration, and HVAC usually benefit the most. We verify performance with metering and a measurement plan, so you can track savings with confidence.
There are two main types. Fixed VO sets a constant output voltage for steady loads. Dynamic VO adjusts in real time to supply swings and load changes, which suits sites with variable demand. We survey your supply, review half-hourly data, and recommend the most suitable approach for stable savings.
Correctly designed VO keeps voltage within equipment operating limits, so plant continues to perform as intended. In fact, running at the right voltage can reduce wear and extend life. We follow manufacturers’ guidance and industry standards, and we provide documentation to support warranty discussions where needed.
Installation is straightforward. We usually fit the VO unit at the LV incomer, or at a sub-distribution board for targeted circuits. Work is planned out of hours where possible, and units include a bypass for safe isolation and maintenance. After commissioning, we confirm output settings and begin performance monitoring.
You also reduce maximum demand charges in some cases, improve power quality, and lower site emissions. In addition, clear reporting supports ESOS and SECR compliance. Because VO eases electrical stress, it can help reduce nuisance trips and temperature-related failures, which improves uptime across critical areas.
