SMA SUNNY BOY STORAGE 3.8-US Instructions D'installation page 42

6 Electrical Connection
Operating mode of multi-
function relay (Mlt.Op-
Mode)
Self-consumption (SelfC-
smp)
Control via communica-
tion (ComCtl)
Battery bank (BatCha)
Fan control (FanCtl)
Switching status grid re-
lay (GriSwCpy)
6.5.3 Connection Options
6.5.4 Connection to the Multifunction Relay
Additionally required material (not included in the scope of delivery):
☐ Conduits: 21 mm (0.75 in) or smaller with a proper reducing bush
☐ Rain-tight conduit fittings for wet locations complying with UL 514B: 21 mm (0.75 in) or
smaller with a proper reducing bush
Requirements:
☐ The technical requirements of the multifunction relay must be met (see Section 10, page 69).
☐ All electrical installations must be carried out in accordance with the local standards and the
National Electrical Code
Requirements on･the conductors:
• Conductor cross-section: 0.2 mm² to 1.5 mm² (24 AWG to 16 AWG)
• The conductor type and wiring method must be appropriate for the application and location.
Procedure:
1.
Danger to life due to high voltages
• Ensure that the inverter is disconnected from all voltage sources (see Section 8,
page 65).
2. Remove the sealing plug from the enclosure opening on the multifunction relay.
3. Insert the conduit fitting into the opening and tighten from the inside using the counter nut.
1)
This operating mode cannot be used in battery inverters
42 SBSxx-US-10-IA-xx-14
Description
The multifunction relay switches loads on or off, depending on the
power production of the PV system.
The multifunction relay switches loads on or off according to com-
mands transmitted by a communication product.
1)
The multifunction relay controls the charging of the batteries depend-
ing on the power production of the PV system.
The multifunction relay controls an external fan, depending on the
temperature of the inverter.
The local grid operator may require that a signal is transmitted as
soon as the inverter connects to the utility grid. The multifunction re-
lay can be used to trigger this signal.
®
ANSI/NFPA 70 or the Canadian Electrical Code
DANGER
SMA Solar Technology AG
®
CSA C22.1.
Installation Manual