... generator:500w-10kw off-grid working system 2kw,3kw, 5kw,10kw,20kw ,30kw,50kw on-grid working system Horizontal Axis Windmill generator:2kw-50kw ... pitch controlled wind turbine, off/on grid working system1. Working system 300w-50kw ... off-grid working system2kw,3kw, 5kw,10kw,20kw ,30kw,50kw on-grid ...