An off-grid power system driven by renewable energy using rainwater harvesting and solar. Not only it provides reliable power supply but at the same time maximizing it. O-GREPH consist of the Cooling tower, Vertical Hydro Electric and lastly the “Home”. These components combine solar and hydro power to generate electricity and store inside battery for future use. Allowing homes to implement a self-sufficient, eco-friendly home that operates independently of traditional utilities.