ADVANTAGE OF DC SOLAR PUMP 1 Permanent magnet DC brushless synchronous motor:The efficiency is improved by 15%-20%; Save energy;Reduce the consumption of solar panels. 2 Brass or stainless steel outlet/connector/oil cylinder. 3 Japanese NSK bearing:prolong the working life. 4 Alloy mechanical seal:Longer working life and high reliability. 5 Motor coil is made by automatic winding machine with centralized winding technology, motor efficiency is much improved. 6 The pump parts are processed by high-precision and fully automatic machines,strictly controlling the dimension precision and smoothness. 7 Intelligent water shortage and full water protection. 8 DC Controller: (1)Waterproof grade:IP65 (2)Ambient temperature:-15~60 (3)MPPT function,the solar power utilization rate is higher. (4)Automatic charging function:Guarantee the pump normally working, meanwhile charge the battery;And when there is no sunshine,the battery can make the pump continuously work (5)LED displays the power,voltage,current,speed etc working condition and error code. (6)Frequency conversion function:It can automatically run with frequency conversion according to the solar power,and user also can change the speed of pump manually. (7)Automatically start and stop working. (8)Water proof and leak-proof:Double seal effect. (9)Soft start:No impulse current,protect the pump motor. (10)High voltage/Low voltage/Over-current/High temperature protection