SMA SUNNY ISLAND 8.0H - Questions on the Battery

SMA Solar Technology AG 6 Electrical Connection
Installation Manual SI80H-60H-OffGrid-IA-en-11 61
Figure21: Connection of the control cable for 1-level load shedding (example)
If you install load-shedding contactors on an off-grid system, always connect them as follows:
Additionally required material (not included in scope of delivery):
☐ Bootlace ferrules
Requirements:
☐ The technical requirements of the multi-function relay must be met (see Section 12"Technical
Data",page144).
☐ Conductor cross-section: 0.2 mm² ... 2.5 mm²
1. Ensure that the load-shedding contactor only disconnects loads from the stand-alone grid. In this
way, you ensure that the battery can be recharged from AC sources in the stand-alone grid.
2. Break through the cable feed-through plate at a suitable position using a sharp object.
3. Strip the insulation from the cable for control of the load-shedding contactor and press bootlace
ferrules onto the wires.
4. Lead the cable through the hole in the cable feed-through plate into the off-grid inverter.
5. Connect the wire for the A1 coil connection of the first load-shedding contactor to the
Relayx NO terminal using the 3-pole terminal (torque: 0.5 Nm ... 0.6 Nm).
6. Connect the wire for the A2 coil connection to the BatVtg– terminal using the 4-pole terminal
(torque: 0.5 Nm ... 0.6 Nm).
7. Connect the BatVtg + terminal to the Relayx C terminal (torque: 0.5 Nm ... 0.6 Nm).
Use the same conductor cross-section as in the cable for the load-shedding contactor.
NO
C
Relay 2
-
+
BatVtg
Relay
A1
A2
Off-grid inverter Load-shedding contactor