How to choose an inverter for a photovoltaic system in Nanjing?

     Configure the corresponding power range of the inverter according to the system requirements. The power of the selected inverter should match the maximum power of the photovoltaic array. Generally, the rated output power of the photovoltaic inverter should be close to the total input power to save costs. The grid-connected inverter is a key device in the photovoltaic power generation system, playing a crucial role in the conversion efficiency and reliability of the photovoltaic system. The main technical principles for inverter selection are as follows:

(1) Reliable performance and high efficiency:

   The current power generation cost of photovoltaic power generation systems is relatively high. If the inverter consumes too much energy or fails during the power generation process, it will inevitably lead to a loss in total power generation and a decrease in system economy. Therefore, the inverter must be reliable and highly efficient, and it should be able to output maximum power (MPPT) based on the current operating conditions of the solar panel components.

(2) Wide adaptability range for DC input voltage:

     Since the output voltage of solar panels varies with sunlight intensity, weather conditions, and load, the inverter must ensure normal operation within a wide range of DC input voltages and maintain stable AC output voltage.

(3) Maximum Power Point Tracking (MPPT):

The input resistance of the inverter should adapt to the actual operating characteristics of the photovoltaic power generation system to ensure that the system operates at the maximum power point.

(4) Low waveform distortion and high power factor:

When large-scale photovoltaic power generation systems are connected to the grid, to avoid polluting the public grid, the inverter must output a sine wave, and the current waveform must be consistent with the external grid. The waveform distortion should be less than 5%, the higher harmonic content should be less than 3%, and the power factor should be close to 1.

(5) Protection functions:

The grid-connected inverter should also have protection functions such as AC overvoltage and undervoltage protection, overfrequency and underfrequency protection, high-temperature protection, AC and DC overcurrent protection, DC overvoltage protection, and anti-islanding protection.

(6) Monitoring and data acquisition:

The inverter should have multiple communication interfaces for data acquisition and transmission to the remote control room. Its controller should also have analog input ports to connect with external sensors for measuring data such as sunlight and temperature, facilitating data processing and analysis for the entire power station.

Jiangsu Mangzhong Construction Co., Ltd. is a comprehensive energy service provider focused on the photovoltaic field, dedicated to being a smart energy enterprise engaged in photovoltaic power plant investment, development, design, construction, intelligent operation and maintenance, professional consulting services, and photovoltaic power plant equipment recycling.

Company Name: Jiangsu Mangzhong Construction Co., Ltd.

Business Scope: Photovoltaic power plant EPC and photovoltaic solar power plant investment

Company Landline: 025-5888 3737

Mobile Number: 159 5163 4545

Company Website: http://www.mangz.cn