SMA SUNNY ISLAND 8.0H - Checking the Wiring

7 Commissioning SMA Solar Technology AG
70 SI80H-60H-OffGrid-IA-en-11 Installation Manual
7.2 Checking the Wiring
Ensure that you carry out all tests relevant to the off-grid system and rectify all detected problems.
Requirement:
☐ The off-grid inverter must be disconnected from voltage sources (see Section 8.1).
Procedure:
•Check earthing.
• Check additional earthing.
• Check the DC connection of the off-grid inverter.
• Check the AC1 and AC2 terminals.
• Check the connection of the generator.
• Check the control and measuring cables.
• Check the wiring of the communication products.
• Check the components of the off-grid system.
Checklist for Earthing
Check item Check criterion OK Not
applicable
Enclosure opening for PE Enclosure opening is sealed with a filler-plug
or M20 cable gland.
The core cross-section of the cable must be
7 mm ... 14 mm for an M20 cable gland.
Conductor cross-section of the
PE wires at the AC1 and AC2
terminals
If one PE wire is connected, the conductor
cross-section must be at least 10 mm². If two
PE wires are connected, each conductor
cross-section must be at least 4 mm².
PE connection to earth The PE wires must be earthed – for example,
by means of a connection to an earthing
busbar or a foundation earth electrode.
In a TN system, N and PE
connection
Ensure by measuring that there is a
conducting connection between N and PE.
Earthing of the battery Ensure that the battery is not earthed
unintentionally.
If the battery has been earthed intentionally,
ensure that the conductor cross-section is
sufficient (see Section 6.5"Earthing the
Battery",page36).