REMIND： 1. Please connect the battery. Second, connect the wind turbine. if you connect wind turbine before battery, the controller may be burned if the wind is heavy. 2. Please short-circuit wind turbine's 3 wires to brake the turbine before connecting the turbine to the controller. 3. The controller chooses its working voltage model 12V or 24V by detecting the battery voltage. if the battery is 12V, the contoller will work at 12V mode; if the battery is 24 V, the contoller will work at 24V mode. 4.The price you paid for the item excludes any customs tax.We will not shoulder any duties in destination country. 5.Please check with your country customs office to determine what these additional costs will be prior to bidding/buying. 6.All informations(products model No.,test result,specification,features,pictures,ect) that we provided are just for reference,Details pls refers to the real prodcut, instruction you received. All datas are our internal lab test results, and it might have a little discrepency upon different surrounding, pls refers to the exact result of the products after installation.1. High quality technical components guarantee its stability and reliability 2. Voltage/current control charging make sure storage batteries are always at the best state of charge. 3. PWM/MPPT charging effectively collect power from generator to charge storage batteries. 4. Aluminium alloy shell makes it light and good heat dissipation. 5. Full protections: overcharge, overdischarge, reverse connection of batteries, overloading, lighting, current control, automatic braking or manual braking of wind generator