Connecting the energy meter


Qualified person

This section describes how to connect the energy meter to the inverter.

The energy meter measures the flow of energy out of and into the utility grid. The measured values of the energy meter are transmitted to the inverter and influence the charging behavior of the battery. The energy meter data may not be used for billing purposes.

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

  • 1 approved energy meter (SMA Energy Meter)

  • One network cable

Network cable requirements:

The cable length and quality affect the quality of the signal. Observe the following cable requirements.

  • Cable type: 100BaseTx

  • Cable category: minimum CAT5e

  • Plug type: RJ45 of Cat5, Cat5e or higher

  • Shielding: SF/UTP, S/UTP, SF/FTP or S/FTP

  • Number of insulated conductor pairs and insulated conductor cross-section: at least 2 x 2 x 0.22 mm²

  • Maximum cable length between two nodes when using patch cables: 50 m (164 ft)

  • Maximum cable length between two nodes when using installation cables: 100 m (328 ft)

  • UV-resistant for outdoor use.

Procedure:

  1. DANGER

    Danger to life due to electric shock

    1. Disconnect the inverter from all voltage sources Disconnecting the Inverter from Voltage Sources).
  2. Remove the sealing plugs from the network connection opening on the inverter.
  3. Insert the cable gland into the opening and tighten it with the counter nut from the inside.
  4. Cut into the two-hole cable support sleeve with a box cutter. This will push the cable into the grommet.
  5. Press the cable support sleeve into the two-hole cable gland.
  6. Insert the cable into the enclosure opening of the two-hole cable support sleeve.
  7. Lead one end of each network cable into the inverter.
  8. When using a self-assembly network cable, assemble the RJ45 connectors and connect them to the network cable (see connector documentation).
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  10. Put the network plug of each cable into one of the network sockets of the communication assembly.
  11. Ensure that the network connector is securely in place by pulling slightly on each cable.
  12. If the inverter is installed outdoors, install surge protection device.
  13. If you would like to establish a direct connection, connect the other end of the network cable directly to the end device.
  14. If you would like to integrate the inverter into a local network, connect the other end of the network cable to the local network (e.g. via a router).