New low cost solar tracker

Abstract New low-cost single axis passive solar tracker based on a shape memory alloy (SMA) actuators has been developed. Main advantages of this tracker are low price (below 150 US $/m 2 ), collectible energy surplus up to 40% (compared to fixed tilt collectors), extremely simple (i.e. reliable) modular solid state design, automatic morning orientation, tracking angle 140° and sealed case. First laboratory tests of the solar tracker prototype were just finished. Field tests have been started at present.