SMA SUNNY ISLAND 8.0H Installation Manual page 38

6 Electrical Connection
Additionally required material (not included in scope of delivery):
☐ 2 x M8 terminal lug, not wider than the outer diameter of the cable
Cable requirements:
☐ Conductor cross-section: 50 mm² ... 95 mm²
☐ Maximum cable length: 10 m
☐ Core cross-section: 14 mm ... 25 mm
Requirement:
☐ The battery voltage must correspond to the battery voltage of the off-grid inverter
(see Section 12 "Technical Data", page 144).
☐ The DC cables must be firmly surface-mounted with no plastic installation ducts. This will allow
for sufficient heat dissipation.
☐ For a single-phase parallel single-cluster system, the cable length and the conductor
cross-section must be the same between every off-grid inverter and the BatFuse.
1. Select an LV/HRC fuse link, size 1 for the BatFuse:
Off-grid inverter
SI 8.0H
SI 6.0H
2. Ensure that the switch-disconnector of the BatFuse is open and secured against reconnection.
3. Unscrew all screws of the enclosure lid and remove the enclosure lid. The screws and conical
spring washers must be safely stored.
4. Clean the contact surfaces of the DC+ and DC‒ terminals with ethanol, for example.
This reduces the transition resistance on the contact surfaces. A low transition resistance
increases the system stability and minimises the risk of damage to the off-grid inverter.
5. Strip the insulation from the DC+ cable and mount a terminal lug.
6. Attach two M32 cable glands with counter nuts to the DC+ and DC − enclosure openings.
7. Lead the DC+ cable through the cable gland for DC+ into the off-grid inverter.
38 SI80H-60H-OffGrid-IA-en-11
Fuse link
200 A
160 A
SMA Solar Technology AG
Installation Manual