Techno economic analysis of residential grid-connected photovoltaic system

Abstract

The aim of the study is to investigate the optimization design of residential grid connected photovoltaic system based on the result of techno economic in HOMER. Malaysia have experienced the scheme of Net Energy Metering for those who participate in the grid connected photovoltaic system, that capable to reduce monthly electricity bills compared to the grid only system that fully depends on the grid energy. Malaysia scheme for renewable energy is change follow the scheme incentive by the government starting with Fit in tariff scheme until net energy metering scheme. The scheme also has the own requirement and several benefit for market player and end user. The scheme is not promising the same rules and requirement for every offer and quota, it is following the incentive by the government at that moment. Latest news the government launched the net energy metering 3.0 after the successful of net energy metering 2.0. this scheme allows customers to sell back their excess energy to grid but on “one on one” offset basis. The priority of this scheme is self-consumption and then excess energy should be sold back to grid. The main objective of this study is to be able to recommended the optimum configuration design of photovoltaic system for every category of household in Malaysia. Involve in this study the effect of electricity tariff since Malaysia tariff divided into fifth block tariff based on the power consumption of end user. This study location selection is in Taman Molek, Johor Bahru. The location of studies also has the own average scale of solar irradiance that will affect the residential grid connected photovoltaic system in Malaysia. Techno economic analysis in this HOMER can help to give the best result for optimization configuration circuit of photovoltaic system. Four factors of Techno-economic analysis to simulate which first is Net Present cost. NPC is the overall cost from the capital itself, operation and maintenance cost, Cost of energy, replacement cost and the revenue total sum up. the second is cost of energy that can offset between the selling energy and the buying energy. The third is payback period which is the time frame for end user get their early stage investment or capital investment. Last factor is the return of investment that can help end user receive profit from grid connected photovoltaic system. All the result is based on the 25 years Lifecyle.