Can I get the SPI document about SPI threshold value for my X3-Hybrid-G4 inverter?

Thank you very much for your attention and trust in our product. We attach great importance to our cooperation with you and understand your concern for product information.
These technical documents are internal confidential information, and in order to protect the rights and trade secrets of both parties, it is inconvenient to provide them to the public. We will continue to fully support your use and maintenance of the product. If you have any needs or questions, please feel free to contact us at any time.