Whenever the system is operating higher than its limit ,can decrease its lifespan and lead to failure.With this, assessments and calculations on standalone PV-system component based on the field assessment and performances in an area in Ibadan, Nigeria. Using relevant formulae to calculate the requirement for each component that constitutes the stand-alone PV-system. The battery as an essential component of the micro grid, its life depends on both depth and rate of discharge. And the result we got shows the abused of components involves the installation especially the battery.The paper suggest an intelligent system to take care of the excess load at a particular time which also will take into account priority of the appliances at the time in relation to the capacity and charge of the battery to control the appliances. Keynote: PV-system, intelligent system, load, battery. I.INTRODUCTION In most of developing country today there is a persistent problem of inefficient use of electrical power generation and transmission assets. With a lot of energy resources in Nigeria, more than 40 % does not have access to the national grid [1]. Apart from this, the use of hydrocarbon has caused a lot of health problem from a byproduct of this energy generation. The next solution to solve this problem is embracement of renewable energy. And most of the areas normally rich in renewable energy especially Africa, which makes it promising to solve power supply problems by using renewable energy and establishing island microgrid systems. Solar energy is one of the endless unsoiled and prospective energy as a gift from nature among all other nonconventional energy options. Since now most developments are concentrated and focus on the development of renewable energy worldwide. To give room for sustainability of it is necessary to do the technical assessment of the resources for those using it and get discouraged due to the unbalanced installment and calculation[2] [3]. There are many factors that lead to challenges facing by quality and efficiency of renewable energy apart from variation in temperature as we want to observe. The battery is very important in renewable energy due to intermittent nature of the sun. We have various types of storage element but in most of the residential use of the renewable energy, they are using Pb-acid batteries. Charge and discharge of this battery are important. The lifespan of the battery depending on the average Depth of Discharge (DOD) which is the percentage of the rated capacity which utilized per circle. The deeper the discharge of a battery, the shorter it's life. The importance of load management in power system and home electric automation is great.Load management can be simply referred to as the way of changing load profile by the action of the customer in her usage or application of some techniques in order to gain from reduced total system peak load, raise load factor and improved utilization of valuable resources like generation, transmission, and distribution capacity [4].In resi...