Docooler LCD Economic PWM Wind Solar Hybrid System Controller 12v/24v Automatic Identification Battery Controller (600w Wind + 400w Solar) Intelligent design succinct structure, control powerful, stable performance, safety and reliability of the products. Boost charging function to solve the low charging efficiency due to the low wind speed(need to customize). Use PWM step less unloading way.LCD display battery voltage and power. Professional digital intelligent control. Perfect protection. CE testing approval.