Recently EnOcean announced its new product self-powered occupancy sensor Sensolux. It combines a 360 degrees PIR detector and light level sensor for automated lighting control. The Sensolux uses solar energy to get the power. It needs just a 3 hours of ambient light a day to be fully charged and can work in the dark for 48 hours.
The solar powered occupancy sensor can be used standalone together with a lighting control actuator or can be integrated into a LON or KNX/EIB network. The Sensolux includes a functionality to report its own energy level.
Personally I like the “green technology” solutions. They save our money and our environment. But, in my mind, £147.10 is too much for 360 degrees motion detector. Even it’s solar powered and “green”.