iTracer Dream Series adopts MPPT technology.Max.150V solar input voltage,12V/24V/48V auto work or Max.120V solar input Voltage,12V/24V auto work .It's also ran by 32 bits CPU,so stability and speed can be guaranteed. Based on the synchronous rectifier technology,the transfer efficiency of circuit can be increased up to 98.5% and the Pmax tracking accuracy up to 99. 5%.So our mppt solar controller can trace the accurate Pmax in the shortest time (10~20s) ,even when the sunlight changes rapidly. It can perfectly handle extreme weather or weak sunlight.It adopted by common negative design and it can start from solar panel,Widely used in solar station and big solar home system.