ISSN (Online) 2321 – 2004 ISSN (Print) 2321 – 5526 International Journal of Innovative Research in Electrical, Electronics, Instrumentation and Control Engineering Nitte Conference on Advances in Electrical Engineering NCAEE-2016 NMAM Institute of Technology, Nitte Vol. 3, Special Issue 2, Month 2016 Copyright to IJIREEICE DOI 10.17148/IJIREEICE/NCAEE.2015.53 265 IJIREEICE MPPT in Battery Charging for PV Applications Joseph Brian D’Souza 1 , Bharathi A Rao 2 PG student, E&E Department, SJEC, Mangaluru, India 1 Assistant Professor, E&E Department, SJEC, Mangaluru, India 2 Abstract: This paper deals with the implementation of maximum power point tracker (MPPT) for solar panel along with safe battery charging algorithm for lead acid battery. This is a stand-alone system with incremental conductance MPPT algorithm and can be used for stand-alone application. Single ended primary inductor converter (SEPIC) is used to match the impedance of solar panel and battery to deliver maximum power. Voltage and current from the solar panel is sensed and duty cycle of gating signal is varied accordingly by the algorithm to attain maximum power transfer. Keywords: MPPT, Incremental Conductance, Battery Changing Algorithm, SEPIC. I. INTRODUCTION In the recent world the use of non-renewable source of energy has drastically increased. These non-renewable sources like gas, oil, coal, nuclear energy etc. has results in the pollution resulting global warming, depletion of Ozone layer etc. now it is time until it’s too late to reduce the use of non-renewable source of energy and focus on renewable sources which are clean form of energy. To meet the raising power demand, photovoltaic technology which is strongly developed can be used, were a part of sun light is transformed into electricity. This paper is basically based on two principle topics, the MPPT algorithm using a SPEIC converter and safe charging of lead-acid battery algorithm. Thus this paper shows the work on MPPT algorithm for photovoltaic stand-alone system aiming to improve the power transfer from solar panel. This MPPT algorithm is used in one of the charging stages of safe charging algorithm of lead acid battery. One of the simple MPPT algorithms is perturbation and observation method but this algorithm isn’t effective for rapidly changing environmental conditions. Looking at the drawbacks of P&O algorithm incremental conductance algorithm was developed. It is based on the fact that increasing panel conductance is equal to the instantaneous panel conductance at maximum power point. Different stages in the safe battery charging of lead acid battery are also explained. II. INCREMENTAL CONDUCTANCE Fig.1: Flow Chart of Incremental Conductance.