Based on the energy consumption data in step 2, you need to check what the peak sun hours you get in your areas, rainy days as back-up, etc. Having the data, we can design and calculate the main parts in the system, to decide what specification required. For example, how much energy is stored in battery system, what solar inverter or charge controller you can choose, and how many solar modules will be installed?Â
Besides, the installation site will also be very important for pv system set-up, because solar panel has to be exposed outside, the best location to get most sunlight and solar energy, it will effect the working status and efficiency of solar system.