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  • What is rapid shutdown and why is important ?

    Nowadays, photovoltaic solar power generation is widely used in various fields. Many countries have realized the importance of the fire problem caused by solar power generation. What is Rapid shutdown?Rapid shutdown is an electrical safety requirement set by the National Electrical Code (NEC) for so

    2022-11-24
  • Distributed pv power station DC arc and fire "safety" hidden danger --- application scenario risk analysis

    Under the national dual-carbon policy, photovoltaic power generation will play the main role in the future energy structure, and will also enter a new era of vigorous development. In 2021, the newly added capacity of distributed photovoltaic power plants exceeds that of centralized power pla

    2022-05-26
  • If the main controller has a black screen, how to solve it? Solution:

    ① Check whether the power cord and the positive and negative terminals are connected tightly, and whether there is any false connection or missing connection;② Except for the power cord and grounding wire, remove all the wires, power off the host and restart it to see if it recovers. If it doe

    2022-01-21
  • If the main controller(FR-DCMG-MMP?) has a flickering screen, how to solve it?

    There are two types of main controller splash screens:2.1 —Communication splash screen2.2 —Powered splash screen

    2022-01-21
  • If the main controller(FR-DCMG-MMP?) has no communication or poor communication, how to solve it?

    ① First check the main controller baud rate, parity bit, address, etc., whether the settings are correct; ② Confirm whether the communication wire used is standard, 485 twisted pair shielded wire; ③ Confirm whether there is a virtual connection between the communication line and the host "A

    2022-01-21
  • What situations need to replace the Hall Sensor

    ① The branch shows a negative current. The negative current is greater than 2A, but when the ruler gauge has no negative current, it needs to be replaced;② No current is displayed on the branch circuit. The current meter measures the current and is greater than 1A, which needs to be replaced;③

    2022-01-21
  • Cautions after the Main Control Module replacement

    Press the "SET" key to enter the Modbus parameter setting interface. The Modbus parameter setting is as follows:

    2022-01-21
  • How to replace the Main Control Module

    Note: Operate in sequence, do not operate (2) first, then (1), otherwise an arc will occur (1)Disconnect ① circuit breaker; (2)Pull out all positive and negative fuses; (3)Multimeter measurement confirms that the voltage between modules PV + and PV- is 0v; (4)Display all the wiring marks

    2022-01-21
  • What circumstances need to replace the Main Control Module

    (1) The Main Controller Module has a black screen. When the multimeter measures a DC voltage between PV + and PV-> 400v, the Main Control Module needs to be replaced.(2) The data of the combiner box cannot be viewed in the background, and the settings (baud rate, parity, address) of the monitori

    2022-01-21
  • Tools needed

    2022-01-21
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