Polycrystalline silicon array, single axis trackers
Single axis trackers adjust the east-west orientation of an array, to increase its solar exposure through the day.
Solar panels are best able to generate electricity from light hitting their surface at a right angle. Adjusting their surface to follow the path of the sun will increase their electricity production.
These trackers are an “active” system, driven by motors according to a pre-programmed schedule. They follow the sun in 6 steps of 15 º before parking in a horizontal position at night and returning to face the east after sunset.
Using a program to angle the trackers will not necessarily always find the direction with the greatest amount of light like light sensitive trackers – however its single line of motion causes less wear on the motor. The tracker is powered from the array’s DC output.
|Electricity produced (annual):||10.95 MWh*|
|System size:||5 x 1.08 kW|
|Array area:||5 x 8.02 m²|
|Number of panels:||5 x 8|
|Panel efficiency:||13.4 %|
|Panel type:||Kyocera KD135GX-LP|
|Panel rated output:||135 W|
|Inverter size, type:||5 kW, SMA SMC 5000A|
|Type of tracker:||BW Solar F2 5 Star Tracker|
|Array orientation:||1 axis tracking, at 30º tilt on average|
|Installation completed: ||30 September 2008|
*This figure is based on an assumption of 1.622 MWh annually, per kWp of installed solar panels. This may prove to be a conservative estimate for Alice Springs. A gain of 25% has been assumed for the tracker.