Off-grid solar power system design

- Jan 14, 2019-

The optimized design of the off-grid solar panel photovoltaic system is to make the configuration of the solar panel photovoltaic system just right, so as to ensure the long-term reliable operation of the volt system, fully meet the power demand of the load, and at the same time enable the solar energy equipped The panel components and accumulators have the smallest capacity, save investment and have the best economic benefits. At this stage, the price of solar panels is still relatively high. When considering the photovoltaic system, various factors should be considered in accordance with the requirements of the load and the local meteorological conditions, in accordance with the principle of energy balance. However, due to the many influencing factors involved in the operation of photovoltaic power generation systems, the relationship is complicated and the design calculation is quite difficult. Many solar panel manufacturers introduced photovoltaic system design methods are not perfect or very complicated, and some do not have the characteristics of photovoltaic power generation, which is very unreasonable, and the designed photovoltaic system is very inefficient, unable to operate stably for a long time, and some even It doesn't work at all. Therefore, the use of scientific design calculation methods to optimize design is the key to building a reasonable and complete photovoltaic system.


 Basic principles for optimal design of off-grid solar panel photovoltaic systems


The design of off-grid PV systems is much more complicated than grid-connected PV systems. Building an off-grid PV system requires a series of designs and determining the tilt of the PV array. Under the premise of fully satisfying the needs of users' load power, the capacity of solar panels and batteries should be minimized to achieve the best combination of reliability and economy, and the tendency to blindly pursue low cost or high reliability should be avoided. In the current situation, it is necessary to correct the practice of unilaterally emphasizing economic benefits and reducing system capacity at will in order to compete in the market.


Solar panel photovoltaic systems and products should be optimized according to the requirements of the load and the meteorological and geographical conditions of the place of use (such as latitude, solar radiation, longest continuous rainy days, etc.), so the two types should be mastered before design data.


The design of the solar panel photovoltaic system is based on monthly energy balance.