For the correct selection of inverters for photovoltaic power generation systems, the technical performance of inverters should be evaluated. According to the impact of the inverter on the operating characteristics of the off-grid main photovoltaic power generation system and the requirements of the photovoltaic power generation system on the performance of the inverter, the following contents are evaluated: 1. Rated output capacity Characterize the inverter's ability to supply power to the load. Inverters with high rated output capacity can bring more power loads. However, when the load of the inverter is not purely resistive, that is, when the output power is less than 1, the load capacity of the inverter will be less than the rated output capacity value given. 2. Output voltage stability Characterize the voltage regulation capability of the inverter output voltage. Most inverter products give the % deviation of the inverter's output voltage within the allowable fluctuation range of the input DC voltage, which is usually called the voltage regulation rate. High-performance inverters should also give the % deviation of the inverter's output voltage when the load changes from 0% → 100%, which is often referred to as the load regulation rate. The voltage regulation rate of the inverter with good performance should be ≤±3%, and the load regulation rate should be ≤±6%. 3. Overall efficiency Characterize the power loss of the inverter itself, usually expressed in %. Larger inverters should also give full-load efficiency and low-load efficiency. The efficiency of inverters below kW should be 80% to 85%, and the efficiency of 10kW inverters should be 85% to 90%. The efficiency of the inverter has an important influence on the photovoltaic power generation system to increase the effective power generation and reduce the cost of power generation. 4. Protective function Overvoltage, overcurrent and short circuit protection are the most basic measures to ensure the safe operation of the inverter. The perfectly functioning sine wave inverter also has functions such as under voltage protection, phase loss protection, and temperature over-limit alarm. 5. Starting performance The inverter should ensure reliable starting under rated load. High-performance inverters can be started multiple times at full load without damaging the power devices. Miniature inverters sometimes use soft start or current limit start for their own safety. For the high-power photovoltaic power generation system and the networked photovoltaic power generation system, inverter waveform distortion and noise level are also very important. Aluminum Window And Door Profiles Aluminum Window And Door Profiles,Aluminium Window Frame Profiles,Sliding Window Aluminum Profile,Extruded Aluminium Profile For Window Guangdong Jihua Aluminium Co., LTD , https://www.jihua-alu.com