Off-grid PV power generation system mainly by the PV modules, brackets, controllers, inverters, batteries and power distribution system components. System electrical design, the main consideration components, solar controller, solar inverter , battery selection and calculation. Before the design, the preparatory work need some time. You need to understand the user installation site of the climatic conditions, load type and power; day and night electricity consumption. Of course, need to know the user's budget and economic situation. In off grid PV power generation system, electricity is depend on weather. However,weather changed frequently.
