A team from the University of Twente and the Amsterdam University of Applied Sciences have published a paper demonstrating gross overbillings by smart energy meters, ranging from -32% to +582% of actual power consumption.
Ironically, the overbilling is largely an artifact of power-saving features, which introduce line-noise that confuses the meters.
Overall, five of the nine smart meters gave out readings much higher than the actual amount of power consumed, while two gave lower readings.
The greatest inaccuracies were seen when researchers combined dimmers with energy saving light bulbs and LED bulbs.
After finishing their lab experiment, researchers dismantled the smart meters to understand the problem. Following their efforts, the three-man research team discovered that smart meters which gave abnormally high readings used a Rogowski Coil in their setup, while the smart meters that gave out low readings used Hall effect-based sensors.
Static energy meter errors caused by conducted electromagnetic interference
[Frank Leferink, Cees Keyer and Anton Melentjev/IEEE Electromagnetic Compatibility](Sci-Hub mirror)
Millions of Smart Meters May Over-Inflate Readings by up to 600%
[Catalin Cimpanu/Bleeping Computer]
The United States Internal Revenue Service says it purchased access to a marketing database that offers location data for millions of US cellphones, so the IRS can identify and track persons suspected of tax-related crimes.
Following the discovery and prompting of a security researcher at Awake Security, Google says it has removed 106 malicious Chrome extensions that had 32 million downloads, and which were gathering browsing history and sensitive credentials from users.
Video-calling app Zoom has been on the end of sharp criticism for security weaknesses. In response, they announced today a plan to offer end-to-end encryption for all users, with a trial to begin next month.
A guy on the Apple discussion forum started a thread titled, “Why do your Charger Cables have the lifespan of a housefly?” That question is probably enough to elicit a whole bunch of head nods from virtually everyone reading this, whether you’re an iPhone user, an Android owner or have virtually any device that needs […]
For all their power and capabilities, image editing software isn’t like sitting down to play a video game. You aren’t there to have fun. You’re likely looking to make a few minor tweaks to an image to make it ready to be shared, then you move on with satisfaction in a job well done. If […]
This is truly a golden age for fans of a big ginormous TV screen. Not too long ago, to buy a television over 40 inches usually meant wheeling one of those massive Mitsubishi or Toshiba projection monoliths into your home, consuming a vast portion of any room at a cost of potentially $7,000 to $8,000. […]