Gemah Ripah Gamping fruit market is the biggest fruit market in the province of Yogyakarta which operated for a full day and produces organic fruit waste on average four tons multitude a day. The organic wastes can cause environmental pollution, air pollution, soil and water. Therefore, the waste used as fuel biogas plants producing electricity. To analyze the most optimal design of biogas plants used HOMER energy software. Through the optimization of this software, it can be seen that the market waste can be used as fuel biogas power plant with the purchase of electricity at $18.535,88/year and sales of $49.860/year with surplus $31.324,12/year.