SMA SUNNY BOY STORAGE 3.8-US Instructions D'installation page 39

SMA Solar Technology AG
6.4 Connecting the energy meter
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. Along with the energy meter, two electrical current strength transducers must be installed
between the grid-connection point and the feed-in point of the battery inverter and the PV system.
The energy meter and the electrical current strength transducers can also be mounted in the
automatic transfer switch in battery-backup systems. Observe all manufacturer specifications and
safety information when installing the energy meter. The energy meter is not a replacement for a
revenue grade meter (RGM). 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 (WattNode
Continental Control Systems, LLC)
☐ 1 data cable
☐ 2 electrical current strength transducers from Continental Control Systems, LLC (mechanical
and electrical characteristics of the selected electrical current strength transducers must be in
accordance with the installation on site)
Requirements for energy meter communication cable:
☐ Cross-section: at least 2 x 2 x 0.22 mm² (2 x 2 x 24 AWG)
☐ Shielding: yes
☐ Twisted pair conductors
☐ UV-resistant for outdoor use.
☐ Maximum cable length: 10 m (33 ft)
Assignment of the terminal block:
Plug
2 3 5 7
Procedure:
1. Strip the RS485 communication cable 50 mm (2 in).
Installation Manual
®
Modbus WNC-3Y-208-MB or WNC-3D-240-MB from
Position Assignment
2 Data+ (D+)
3 Not assigned
5 Ground (GND)
7 Data (D-)
6 Electrical Connection
SBSxx-US-10-IA-xx-14 39