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Voltage Optimization Unit for UK Homeowner

Are you worried about the high electric bills? Here is a gadget that can help you monitor and optimize your voltage. 

This article aims to educate people about the working and efficiency of this smart electric gadget called the "voltage optimization unit." Let's review this product and find out if it is worth your money.

Voltage Optimisation - A Smart Energy Saving Technique

Voltage optimization is an intelligent power-saving technique that regulates incoming power from the national grid. By reducing the supplied voltage to the optimal level, you can reduce power consumption while lowering your CO2 emissions! This smart technology can be used in appliances and electrical appliances at home and at work by simply installing a smart device known as a voltage optimizer.

What is a Voltage Optimiser?

Electricity is generally supplied at a voltage higher than that required by the national grid. The UK's official normal supply voltage is 230V, but the actual voltage supplied by the national grid varies on average around 242V.

Most electrical appliances have a voltage of 220 volts. The devices then come with more than they need to function. This leads to a waste of energy and money. It also causes additional wear on the hardware.

You can lower the voltage your home or business receives by simply installing a voltage transformer. A voltage optimiser installation with the power supply between the distribution transformer and the main low-voltage switchboard. When electricity passes through the voltage enhancer, the supply voltage is reduced to the required amount.


The excess voltage supplied is fed back into the grid and not used on-site. Devices benefit from better power when excess energy is removed and fed back into the grid.

The job of a Voltage Optimiser

Powering your home or business at a higher or lower voltage than required can cause operational problems or waste energy and money.

Some elements of electrical equipment can consume more energy at higher voltages. This is where voltage optimization solutions can help.


This appliance is designed to change the voltage level from your power source to the level required by your appliances or work, thus saving energy. That is, the voltage of the power supply supplied to the equipment is reduced. Your site will never use excessive voltage from a network source.


This technique uses a series-connected transformer to reduce the voltage level.

These solutions help users achieve average energy savings of approximately 13%, according to BEAMA (formerly the British Electrotechnical and Allied Manufacturers' Association), by reducing the supply voltage to the minimum legal voltage range.

How Does Voltage Optimisation Save Money?

As electrical units operate closer to baseline design voltages, savings can be realized primarily in kWh reduction. The main savings on electricity bills are:

  • Low kWh consumption

  • Depending on the load dynamics, the savings come from a kWh reduction, decrease in demand

  • Demand may drop slightly, but generally not by enough to reduce the percentage of acceptable supply capacity.

  • The cost of reactive power

  • As demand decreases, the reactive power load may decrease slightly. Reduce emissions

  • As consumption is usually directly related to kWh consumption, it can significantly reduce CO2 emissions.

  • Low maintenance cost 

  • Devices that operate at higher pressures than necessary to do the same thing don't last as long as pressure regulators.

240 voltage
Voltage Optimisation - A Smart Energy Saving Technique
Voltage Optimization Unit for UK Homeowner
The job of a Voltage Optimiser
What is a Voltage Optimiser?
How Does Voltage Optimisation Save Money?
Benefits of an voltage optimisation unit 
Negatives of a Voltage Optimiser
Voltage Optimiser installation cost

Pros of a Voltage Optimisation Unit

Here are some noticeable perks of using a VO unit:

  • Low CO2 emissions reduce your CO2 footprint.

  • The power quality in your home or business has improved. Improve the life of electrical appliances and equipment.

  • Typical savings claimed by voltage optimizer users are around 15%. 

  • With these savings & the ever-increasing cost of electric, your initial investment will pay for itself quicker than ever and provide significant savings for large, energy-intensive buildings or homes.

  • Optimizers are also said to extend the life of electronic products. 

  • Rectifiers block harmful current surges that can seriously damage electronic equipment because they are usually set at a certain voltage or automatically adjusted to a lower voltage.

Cons of Voltage Optimisers

Some argue that voltage optimizers are wasteful and do not reduce power consumption.

For example, if you cook from 216V (with an optimizer) to 253V (without an optimizer), the food takes longer to cook, so the energy consumption remains the same without reducing it. 

  • Appliances that rely on thermostats, such as stoves, refrigerators, and ovens, cannot save money using the optimizer because it takes a long time to reach the desired results. 

  • Many modern electronics also use variable-mode power supplies. This means that when the voltage is low, the device draws more current to maintain and compensate for the device's standard operation. 

  • The optimizer works for incandescent lamps; the lower the voltage, the weaker the light.

  • Optimizers can also cause surges in low-voltage or electronic equipment. 

  • Overvoltage can shorten life and increase power consumption. For example, if a lamp operates at 230V and the optimizer is set to 240V, just as a 230V appliance operating at 240V will consume more power, the overall life of the lamp will be shortened, resulting in higher energy.

  • Another disadvantage of voltage optimizers is that they are expensive.

Cost of Voltage Optimisers

The price depends on the brand you choose and the level of specification. Indoor unit prices start from around £350 and go up to £1,500 for commercial/industrial systems.


Again, your purchase decision results in direct savings in a short period.

Frequently Asked Questions

How easy is it to install a voltage optimisation unit?

Voltage optimizers are relatively easy to install by a qualified electrician. In most installations, the device must be installed between the main power meter and the utility. Just connect the two with some wires. Each location has specific requirements that must be considered individually by an energy professional.

Do they save energy and money? 

Voltage optimization technology saves up to 15% energy on average.

Saving begins immediately but usually pays for itself after 2-4 years. A four-bedroom home with Eco-Max Optimizer can offer a 27% return on investment. This is an advantage over any bank.

Retailers installing high-quality VO units across 5 stores will save £ 3,353 per year. A hotel pays for a commercial VO in just 25 months. Their savings would therefore have lasted more than two decades.

Major retailers can save up to 1,823 tons of CO2 emissions per year by installing voltage optimizers. 

Normal energy savings by appliance are as follows:

  • -14% on chillers,

  • -4% on direct motors,

  • -15% on some types of lighting,

  • -16% on all appliances.

Do I need to install a voltage booster?

Voltage Optimizer is a simple and effective way to lower energy costs and reduce CO2 emissions. For the average energy consumer, ease of installation and a short payback period are good reasons to invest in this smart technology. 

However, if you're still unsure, it's a good idea to seek advice from an energy professional before installing a voltage optimizer. Using a voltage optimizer in conjunction with a solar panel system is recommended as it can save a lot of energy. Watch some YouTube videos and guides to familiarize yourself with the whole process of what the inside of a home energy system looks and feels like with solar and voltage optimizers installed.

Common questions on voltage optimization units
How easy is it to install a voltage optimisation unit?
Do optimisers really work?
Do you need to transform voltage to 240v

Final Word

Energy monitoring, with or without voltage optimizers, allows consumers to be aware of their general usage and usability (such as wind turbines and solar panels) to be aware of their overall production, which is important for monitoring the energy, ensuring efficient use of energy, and prevents unnecessary wasting. Energy is a valuable resource for all businesses and homes, so installing an energy monitoring system can help monitor efficient energy use, reduce global warming, and reduce carbon emissions from fossil fuels.

Choosing a voltage optimizer depends on whether you think it will benefit you, but there has never been a better time to move on with energy monitoring. 

You should always use a fully qualified electrical contractor for installation.

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