Checking Electrical Connections

Qualified person

DANGER

Danger to life due to electric shock when live components or DC cables are touched

The DC cables connected to a battery may be live. Touching live DC cables results in death or serious injury due to electric shock.

  1. Have the inverter and the battery mounted, installed and commissioned only by qualified persons with the appropriate skills.
  2. Disconnect the system from voltage sources and make sure it cannot be reconnected before working on the device.
  3. Do not touch non-insulated parts or cables.
  4. Wear suitable personal protective equipment for all work on the product.

Maintenance work

Follow the local regulations and standards whenever performing maintenance work.

These electrical connections must be checked every 12 months:

Requirements:

  • A mobile end device (e.g., laptop) must be connected to the battery management system.

  • The BatMon software must be installed on this end device.

Procedure:

  1. Disconnect the inverter from voltage sources ( > Disconnecting the Inverter from Voltage Sources).
  2. Disconnect the battery from voltage sources ( > Disconnecting the Battery from Voltage Sources).
  3. Check and resecure all connectors in the battery cabinet.
  4. Check that all screwed electrical connections have been tightened with the correct torque.
  5. If any connections are not tightened with the correct torque, tighten with a suitable torque wrench.
  6. Check the state of charge (SoC), state of health (SoH), cell voltages, and temperatures of the battery modules for irregularities. Use the BatMon software for this.
  7. If you find any irregularities, contact Service.
  8. In the BatMon software, open the Battery and Cell pages for each battery module and document the content of these pages as a screenshot.
  9. Archive all screenshots together with the event messages as a PDF.

    Also see:

    Cleaning and Maintenance Procedure
    Performing a Visual Inspection of the Battery