SMA SUNNY ISLAND 8.0H - Starting and Stopping the Off-Grid System; Switching On the Off-Grid Inverter; Starting the Off-Grid System

SMA Solar Technology AG 6 Electrical Connection
Installation Manual SI80H-60H-OffGrid-IA-en-11 37
• Fasten the clamping bracket using a M6x16
hexagon socket screw and a conical spring
washer (torque: 4 Nm ... 5.7 Nm). The teeth of
the conical spring washer must face the
clamping bracket.
6.6 Connecting the BatFuse to the Off-Grid Inverter
Risk of electric shock when the battery is connected
The off-grid inverter can start automatically from standby when the battery is connected.
• Only insert the BatFuse fuse links in the course of commissioning.
Recommended minimum battery capacity
If the battery capacity selected is too low, system failures may result.
• Observe the recommendations for the minimum battery capacity connected to the
DC terminal of the off-grid inverter (see Section 12"Technical Data",page144).
The recommended capacities of the individual off-grid inverters in a cluster are added to
yield the total minimum battery capacity.
Cable length and recommended conductor cross-section for the DC connection
Long cables and insufficient conductor cross-sections reduce the efficiency of the system and
impair the overload capacity of the off-grid inverter. The maximum cable length is 10 m. The
recommended minimum conductor cross-section depends on the battery voltage, the power
and the cable length between the battery and the off-grid inverter:
Off-grid inverter Cable length Conductor cross-section
SI 8.0H ≤ 5 m 70 mm²
>5m 95mm²
SI 6.0H ≤ 5 m 50 mm²
>5m 70mm²