Article in Sunday times today about savings of up to 10% from household use of the VPhase domestic voltage optimisation equipment.
I'd heard about this technology before but had read that it only made sense in factories. However the claims of 10% saving made me think....a £300 device saving £50-£100 per year is not a bad return ( if it really works).
Firstly it's no use for heating loads such as immersion heater or cooker, but it is good for lighting, tvs, computer, and devices with motors such as washing machines, fridges, etc. Seemingly such white goods are designed for 220Vac, and if run at a higher voltage they generate waste heat.
Worthy or further investigation methinks.
So, here's the report, anticipate savings typically of 6% in a standard domestic setup.