Tech expert slays myth of energy-guzzling ‘vampire devices’

theguardian.com:

As the cost-of-living crisis bites, and households look for any opportunity to cut the bills, headlines suggesting consumers can save hundreds of pounds just by turning off unused chargers have been an appealing prospect. But, experts say, such claims about “vampire devices” are actually more like a zombie statistic.

“Things have dramatically improved since those studies were first carried out,” said Craig Melson, an associate director for climate, environment and sustainability at techUK. “Processors are low-power, screens have switched from LCD to LED technology, fridges and washing machines have become more efficient. Technology is just more miniaturised, more efficient, using better processors – and, crucially, they are more adaptable as well.”

One recent report from British Gas claimed “Brits could … save an average of £110 per household per year by simply flicking a switch”. The energy provider said 23% of British energy bills were caused by “vampire electronics, those that continue to drain power when left on standby”.

But that statistic came from a 2015 report from the US National Research Defence Council, based on analysis of homes in California. “Think about the laptop you used 10 years ago,” Melson says: “That might need a big ugly plug in the middle, a big transformer. By and large, now you can just plug them straight into USB-C: that is much more energy efficient, and there is no need to draw power.”

As well as being seven years old and based on another country’s energy, consumers may struggle to make some of the suggested savings: a third of the “always on” electronics identified in the study are “recirculation pumps, fishponds, aquariums, and protected outlets in bathrooms, kitchens and garages.” Consumers who