Your home’s electricity voltage is reduced when you use a voltage optimiser. Electricity companies claim you can save money on your electricity bills by reducing your electricity consumption. There have been claims of 20% savings on electricity bills. Depending on the home, voltage optimisers reduce or increase electricity use, according to a study.

Make sure the voltage optimiser is worth the cost compared to the savings it will likely generate. There are several factors that can affect your potential savings, including the power of your incoming voltage, which appliances you own (e.g., if you already have energy-efficient appliances and how much electricity you use), the voltage optimiser’s lifespan, and your incoming voltage.