In this section,students are expected to put together the cost for this project. It is important that you specify the cost for each component into detail and accurate as possible and then find the total cost for the project. From section 3.2, the amount of electricity in kw hr is determined. The number is often referred to the unit of electricity. By multiplying the cost of electricity per unit to this number, we can estimate the money saving per day from our PV system. At the end,the payback period must be calculated.