Connecting the Data Cable of the Battery

Qualified person

For details on approved batteries and a circuitry overview of the battery communication connection, refer to the technical information available "Approved Batteries and Information on Battery Communication Connection" at www.SMA-Solar.com

If there are several inverters and only one battery in the system, the battery should be connected to the inverter that is to be configured as the System Manager.

Battery communication and switch for secure power supply operation use the same cable gland

If a switch for secure power supply operation is to be connected, insert the battery communication cable into the cable support sleeve along with the switch connection cable for secure power supply operation and insert it into the inverter.

Additionally required material (not included in the scope of delivery):

  • Where required: Field-assembly RJ45 connector.

Procedure:

  1. Disconnect the inverter from all voltage sources ( > Check that the inverter is de-energized).
  2. When using a self-assembly network cable, assemble the RJ45 connectors and connect them to the network cable (see connector documentation).
  3. Remove the filler plug from the enclosure opening for connecting the battery communication cable.
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  4. Insert the M32x1.5 cable gland with four-hole cable support sleeve for communication connections into the enclosure opening for connecting the battery communication cable and tighten it from the inside with the counter nut.
  5. Unscrew the union nut from the cable gland and lead the battery communication cable through.
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  6. Remove the four-hole cable support sleeve from the cable gland.
  7. Insert the data cable of the battery through the cable gland.
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  8. Use a cutter knife to cut an enclosure opening suitable for the battery communication cable into the four-hole cable support sleeve.
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  9. Insert the battery communication cable into the enclosure opening.
  10. Press the cable support sleeve into the 4-hole cable gland and guide the battery communication cable to the network port BATTERY.
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  11. Plug the battery communication cable into the BATTERY network port.
  12. Ensure that the battery data cable is securely in place by pulling slightly on it.
  13. Tighten the union nut on the cable gland hand-tight.

    Also see:

    Connecting the Network Cables
    Connection to the Multifunction Relay