SMA Home Storage HS-BM-3.28-10 - Electrical Connection Procedure

7 Electrical Connection
SMA Solar Technology AG
Operating Manual 37HS-BM-3.28-10-BE-en-10
☐ The DC cables must be rated for the maximum battery voltage and the maximum battery current.
7.3.3 Battery data cable requirements
Battery data cable for the connection between the SMAHomeStorage and
SunnyTripowerSmartEnergy
For the connection between the SMAHomeStorage and SunnyTripowerSmartEnergy, a pre-assembled battery
data cable must be used (SMA order number: HS-COM-CBL-3-10). This battery data cable has an RJ45 and a
COM connector.
A commercially available network cable can be used as a battery data cable. The cable length and quality do affect
the quality of the signal. Observe the following cable requirements:
☐ Cable category: minimum CAT5e
☐ Plug type: RJ45 of Cat5, Cat5e or higher and without integrated lockingleverprotection
☐ Shielding: SF/UTP, S/UTP, SF/FTP or S/FTP
☐ Maximum cable length between 2 nodes when using patch cables: 50m
☐ UV-resistant for outdoor use
7.4 Electrical Connection Procedure
This section describes the procedure for the electrical connection of the product. It provides an overview of the steps,
which must be performed in the prescribed sequence.
Procedure See
1. Ensure that the requirements for the electrical connection
are fulfilled.
Section7.3, page36
2. Connect the grounding of the modules among each
other.
Section7.5, page37
3. Connect the grounding. Section7.5, page37
4. Connect the data cables of the modules among each
other.
Section7.6, page38
5. Connecting the battery communication system to the in-
verter
Section7.8, page41
6. Connect the DC cables of the modules among each
other.
Section7.9, page42
7. Routing the DC cables to the inverter Section7.9, page42
7.5 Connecting the Grounding
Additionally required material (not included in the scope of delivery):
☐ A suitable grounding cable with ring terminal lug for the connection of the additional grounding via an external
grounding point.
☐ At least 1 longer grounding cable is required to connect the battery modules to each other (minimum length:
1.5m) if they are not mounted directly above each other. This is unavoidable for:
– 4 or 5 battery modules
– Back-to-back