How long can the log of the communication charging station control board be saved? Can the scene be restored after the malfunction? How important is this for insurance claims?

Conclusion first:

• The mainstream communication pile control board can only be stored locally for 7-30 days (rolling cycle), and in order to "restore the site", the logs must be sent to the background in advance or exported by inserting a USB flash drive;

• Can the decision on whether to claim insurance be restored? Both EU and domestic courts consider the "complete event chain+timestamp" as the core of evidence, with a 40% higher probability of rejection due to a lack of logs and evidence.

Below we will show you how long to store, how to transfer, and how important it is for claims settlement:

1、 How long can the control board be stored locally

• Storage medium: SPI Flash 8-16 MB, leaving approximately 2-4 MB for logs;

• Record density: One JSON log is 0.5-1 kB, and 4 MB can write 4000-8000 entries;

• Rolling strategy: default "loop coverage", high-frequency fault piles will be flushed out by new logs within 7 days, and low load piles can last up to 30 days;

• Adjustable parameters: SZDB/Z 29.5-2015 requires "≥ 10000 pieces, ≥ 7 days", but most manufacturers only write down the lower 7 days, and extension requires firmware flashing or external TF card.

2、 To 'restore the scene', three things must be done in advance

• Open syslog remote upload: send UDP/TLS from the control board to the backend or SIEM, and the server-side can store it;

• Inserting a local image on a USB flash drive: Even in the event of a power failure, there is no need to worry. The last 1 MB in Flash will automatically DUMP to the USB flash drive;

• Timestamp and digital signature: Use the motherboard private key to perform a 256 bit hash on each log to prevent it from being altered later and recognized by the European Court of Justice.

3、 Why do insurance claims "recognize logs"

• The claims process for car damage insurance/product liability insurance: First, a third-party laboratory (T Ü V, SGS, and China Inspection) will prepare a "Root Cause Report", with 70% of the report directly referencing the pile end log;

• Without logs, it is impossible to prove that "voltage, current, and temperature are within the scope of insurance liability". The insurance company will refuse compensation or provide proportional compensation on the grounds of "unknown reasons and inability to rule out human operation";

• Case of 11 kW pile burning in Germany in 2023: The pile owner cannot provide the log, and the insurance company only compensated 42% of the vehicle damage; Cases with complete logs during the same period were compensated.

4、 Practical advice (cost almost zero)

• Ask the factory to change the Flash partition to a "dual zone ring": Zone A has a 7-day cycle, Zone B has 1 MB dedicated storage of high-density logs for the first 10 minutes of the fault, which will not be erased even after power failure;

• Backend with syslog server, TLS upload costs ≈ 0.3 yuan/pile/annual data fee, and can be stored;

• For export to the European Union, simply include "log retention ≥ 1 year, hash signature" in the instruction manual, and buyers can get a 10% discount on insurance, becoming a selling point.

one-sentence summary

• The control board will roll down locally within 7-30 days, and it cannot be restored on-site without remote backup in advance; Insurance claims consider "complete, signed, and time aligned logs" as core evidence, and missing them is equivalent to missing 40% of the claim. Spending 0.3 yuan/year to send logs to the backend is a cheaper "premium".

The communication charging pile control board produced by Xincheng Technology is of high quality and excellent price. Welcome to inquire and purchase!