This research appraises comparative analysis between single diode and double diode model of photovoltaic (PV) solar cells to enhance the conversion efficiency of power engendering PV solar systems. Single diode model is simple and easy to implement, whereas double diode model has better accuracy which acquiesces for more precise forecast of PV systems performance. Exploration is done on the basis of simulation results and MATLAB tool is used to serve this purpose. Simulations are performed by varying distinct model parameters such as solar irradiance, temperature, value of parasitic resistances, ideality factor of diode and number of series and parallel connected solar cells used to assemble PV array. Conspicuous demonstration is executed to analyze effects of these specifications on the efficiency curve and power vs. voltage output characteristics of PV cell for specified models.

For many reasons Bangladeshi people are now using renewable energy. So, solar energy is the best renewable energy till now, in respect of Bangladesh. So using of solar system is common nowadays. Bangladesh Government has taken some steps to make solar system compulsory. In this paper we discussed about importance of solar home system for domestic application. Here we will also discuss a safety device of solar home system. This paper also focused safety device with a practical experiment. We implement a low voltage alert circuit and low voltage indicator circuit for better performance of solar home system. Keyword-Smart Solar Home System (SSHS), Rooftop, Safety Device, Low voltage alert.2012 14th International Conference on Modelling and Simulation 978-0-7695-4682-7/12 $26.00

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