Requirements for the Battery Communication and Power Cables

SMA Solar Technology AG recommends that you use the cable with the following designation, which is available from SMA.

  • HS-COM-CBL-3-10

This cable is preassembled for use with SMA Home Storage. This cable can be used with any other battery by rewiring it.

When using another cable, observe the following cable requirements:

  • Twisted pair conductors

  • Cable category: minimum CAT5e

  • Cable with shielding: Yes

  • Conductor cross-section: 0.1 mm² to 1.5 mm²

  • External diameter: 5.3 mm to 7 mm

  • Maximum cable length: 10 m

  • UV-resistant for outdoor use.

  • Recommendation: Use a network installation cable with 1-core rigid wire

  • Comply with the requirements of the battery manufacturer.

  • If an installation cable is not used, the individual cable ends must be provided with a 12 mm long bootlace ferrule.

Note that the requirements are different when using an LG RESU FLEX:

  • Conductor cross-section: 0.3 mm² to 0.5 mm²

  • External diameter: 5.5 mm to 6.5 mm

Observe manufacturer's specifications for battery power cables

When crimping battery power cables, the appropriate tool, correct cable cross-section, proper insulation stripping length, and a firm but non-damaging crimp are essential for a safe and conductive connection. Make sure not to damage the stranded wires and to insert and tighten all components correctly, especially the strain relief, to ensure a durable, moisture-proof, and abrasion-resistant connection.

    Battery Communication Connection
    Connection to SMA Home Storage