VO4HOME is a unique voltage optimisation unit designed to reduce a home's or small businesses electricity costs and CO2 emissions. The VO4HOME unit optimises the incoming voltage to a premises to a constant 220V giving householders immediate and significant energy savings for the whole home. Most electrical equipment manufactured for Europe and the UK is rated at 220V and may indeed operate at an even lower voltage. The average incoming voltage to a home from the National Grid is 242V (although it can be as high as 253V). There is nothing to be gained by operating equipment at a voltage higher than it was designed for; quite the contrary as over-voltage will significantly reduce the life expectancy of most household appliances.Installing a VO4HOME voltage optimisation system in your home reduces wear and tear on household appliances caused by electrical over supply and power surges. It can also save money on electricity bills by between £130-£200 per year.