Tri-band routers (one 2.4 GHz and two 5 GHz radios) are destined to ramp up energy consumption for WiFi CPE, but if adopted en-masse, deep sleep modes are one potential savior. However, as consistently criticized in Faultline, such energy-saving modes have been seldom adopted by operators, ever since Orange claimed it was the first in the world to wind power down to just 0.3 Watts. A new report from the WLAN Application Alliance (WAA) and ABI Research has now drawn some worrying projections regarding the energy consumption of WiFi CPE. It finds that 105.05 terawatt hours (TWh) of electricity was consumed by a global footprint of 1.55 billion residential WiFi access points (APs) – equivalent to the annual energy usage…