Olden energy system only operated well when energy fuel was inexpensive and lavishly accessible, but absolutely does not produce affluence if the energy fuel becomes costly and scare. Bangladesh is passing by a cross road in its effort to struggle the present energy crisis and future energy need. Bangladesh has struggled in finding new energy sources for a long time. The extensive dependence on limited coal and gas has put the country under tremendous pressure. It is projected that with the rapid increase in population and industrialization the demand of energy will be doubled in 2050. Geologically it is impossible to connect by the grid line to the rivers, canals, island based off-grid area. Renewable resources has opened new door with ample opportunities for those off-grid areas by generating grid quality electricity. For thousands of years biomass has been overwhelming as associate degree energy supply by men. To ensure the optimal utilization there is the need to assess the existing biomass potential, technologies and challenges. The assessment is conducted by analyzing the accessible data from diverse consistent sources through the procedure of exact qualitative and quantitative to authenticate the results. This assessment evaluates the biomass energy potentiality which includes agricultural residues, forestry residues, animal dung, solid waste from municipalities, and the consumption pattern of biomass, practicing technologies, and challenges in Bangladesh. The assessed entire quantity of biomass source offered for energy in Bangladesh in 2017-2018 is 94.16 (million tons) with yearly energy potentiality of 47 (million tons) of coal equal. In 2017-2018, the retrievable quantity of biomass is 94.16 (million tons) which has associate energy potentiality of 1378 (PJ) that is comparable to 383 (TWh) of electricity.

In the present scenario, the rapid increase of fuel cost and utility price in Bangladesh is providing hindrance for the growth of its economy. Energy demand is very sensitive for the activities of day to day life. However, the vast availability of rooftop makes our living and working place a lucrative candidate for solar photovoltaic adoption. This research identifies various aspects of solar photovoltaic adoption in commercial spaces where important decision regarding the development of economy take place by considering economic and technical viability through this feasibility study. This technical study suggest that the implementation of solar photovoltaic will remedy the suffering of working people during the time of load shedding. The aim of this paper is to achieve the optimal export rate in different conditions such as incentives, grants, and interest rate. Proper incentives and reduction of bank interest can make the renewable energy electricity generation adoption in commercial building space competitive with traditional power generation. The proposed project life is about 20 years and the payback period is only 7.9 years with positive NPV and higher IRR.