Solys 2 Sun Tracker with stand-alone solar tracking and integrated GPS receiver. Stepping motor drive through inverted tooth belts. Includes tripod with leveling feet and side mounting plate with mountings for a pyrheliometer. Directional accuracy less than 0.1 with passive tracking, less than 0.02 with active tracking (requires sun sensor). Torque 20Nm (23Nm when Sun tracking), payload 65kg (balanced). Power Supply 18 to 30vDC and 90 to 264vAC @ 21W (13W at night) plus 100W heater, AC only. Operating temperature range -20 to +50 C (DC power), -40 to +50 C (AC power). Ethernet & web interface communications. Multi-function power and status indicators. No software or PC required for installation and setup.