Low Energy House

Low Energy House - Voltage Optimisation - Save Electricity!

In the UK, the voltage of electricity feeding into a house will typically be around 242 volts but many appliances will actually operate more efficiently, and use less electricity, at a much lower voltage

Voltage Optimisation Unit

Voltage Optimisation Unit - Image Provided by VPhaseA voltage optimisation unit will reduce and regulate the incoming voltage to a house and will manage it to a stable level. Voltage optimisation technology will: make savings on electricity bills, reduce wasted energy and lower carbon emissions.

Fitting a Voltage Optimisation Unit

A voltage optimisation unit can be installed by a qualified electrician. It requires no maintenance and will immediately save energy across a wide range of appliances throughout the home. The voltage optimisation unit is fitted adjacent to the consumer unit and connected to power and lighting circuits, where it manages the voltage.

Voltage Optimisation – Optimising Electrical Circuits

After testing all the circuits, the electrician is able to select those which will derive the most benefit from being supplied through the voltage optimisation unit. Voltage optimisation may not yield savings on all electrical equipment within a dwelling.

Generally, voltage optimisation works best on inductive loads like motors and lighting, but some resistive loads and high frequency lighting are unlikely to yield any savings. Temperature controlled heating is the type of load where no energy saving will be achieved.

Voltage Optimisation – Voltage Levels

As a result of European harmonisation, the declared voltage of the electricity supply in the UK is now 230 volts, with a tolerance of plus ten per cent to minus ten percent (+10% to -10%). This means that supply voltage can theoretically be at a level between 207 volts and 253 volts, depending on local conditions.

On the UK mainland, the average voltage supplied from the National Grid is 242 volts, compared to the nominal average European voltage of 220 volts. As a result, most electrical equipment manufactured for Europe and the UK is rated at 220 volts and may operate satisfactorily on voltages as low as 200 volts.

Saving Electricity with Voltage Optimisation

Energy savings are achieved by providing voltage optimisation for the electrical equipment and lighting used throughout the dwelling.

Trials of voltage optimisation units have demonstrated that an average electrical energy saving of 8.7 per cent can be achieved. Typical savings include: 17 per cent on fridges and freezers, 15 per cent on lighting and 10 per cent on new energy saving light bulbs.