For photovoltaic power generation systems using string inverters, in order to reduce the connection lines between the inverter and the grid connection point, facilitate maintenance, and improve reliability, it is generally necessary to add an AC combiner device between the inverter and the grid connection point. The NXK2 series AC combiner box produced by our company is specially designed to meet this requirement and can be matched with photovoltaic inverter products to form a complete photovoltaic power generation system solution. Users can connect a certain number of inverters with the same specifications directly in parallel to the AC combiner box through AC cables based on the rated voltage output of the inverter, and install lightning arresters and circuit breakers to improve system safety.
The communication junction box is equipped with branch circuit breakers, output circuit breakers, lightning arresters and other components. Both the branch circuit breaker and the output circuit breaker have a thermal magnetic trip two-stage protection function. The input and output circuit breakers are designed using the principle of graded protection to maximize power generation efficiency.

In solar photovoltaic power generation systems, string inverters are used in large power plants, and AC combiner boxes are used for the connection between centralized convergence and box transformers or grid connected cabinets. In order to improve the reliability and practicality of the system, AC lightning protection modules, AC fuses, waterproof terminals, etc. are installed in the photovoltaic AC combiner box.

1. The cabinet body is made of hot-dip galvanized steel plate, with a safe and reliable structure and sufficient mechanical strength;
2. The protection level is IP65, and it has functions such as waterproof, moisture-proof, dustproof, rust proof, and salt spray proof, meeting the requirements for outdoor installation;
3. Equipped with photovoltaic dedicated circuit breakers and photovoltaic dedicated lightning arresters. Photovoltaic waterproof joints;
4. The box body wire adopts high-quality copper wires and copper bars to ensure safe and reliable connections;
5. The box design is compact and neatly arranged, meeting the electrical design requirements;
6. The AC box can be customized with a rated voltage of 380V~690V based on the string inverter;
7. The lightning arrester can be configured with B-level or C-level lightning protection;
8. According to customer requirements, the communication box can be equipped with multifunctional instruments to collect current and voltage, as well as the status of circuit breakers and lightning arresters, and send them to the backend monitoring system through RS485 communication; (Note: Different parameters and materials can be customized according to customer requirements)