Michal 
Assuming electricity cost of ~0.20€/KWh, every 1W of always-on device costs you ~1.75€ per year (0.001 * 24 * 365 * 0.2 = 1.752).
So that old TV that sips 30W on standby costs you 50€ per year to have plugged in.
Assuming electricity cost of ~0.20€/KWh, every 1W of always-on device costs you ~1.75€ per year (0.001 * 24 * 365 * 0.2 = 1.752).
So that old TV that sips 30W on standby costs you 50€ per year to have plugged in.