A green power system includes at least one solar panel, an auto-switch uni-directionally connected to the solar panel, a grid/generator uni-directionally connected to the auto-switch, at least one equipment with AC/DC uni-directionally connected to the auto-switch, and a solar charge controller installed to the auto-switch, or bi-directionally and electrically connected between the solar panel and the auto-switch, or installed to the equipment with AC/DC, and the solar charge controller is bi-directionally and electrically connected to at least one power storage device.