Rancilio have been busy making more improvements to the very popular Miss Silvia V4. The changes have made a new model called the Silvia E. The first improvement was to insulate the boiler, this helps reduce power consumption and makes the new SIlvia E more of a green machine. Rancilio has also conformed with the European EuP directive. The coffee machine now shuts off automatically after 30 minutes of inactivity. Meaning the Silvia consumes less than 0.5 Wh (watt-hour) in standby mode. Rancilio's recent upgrades furthur enforces how dedicated they are to their customers.
http://www.homecoffeemachines.ie/products/rancilio-silvia-v4