7 Commissioning SMA Solar Technology AG
72 SI80H-60H-OffGrid-IA-en-11 Installation Manual
Checking for AC1 and AC2 Terminals of the Off-Grid Inverter
Battery current sensor, if
present
The battery current sensor can be loaded
with the maximum DC current (see technical
data of the battery current sensor).
Check item Check criterion OK Not
applicable
AC1 and AC2 enclosure
openings
All enclosure openings are sealed with M25
cable glands or filler-plugs.
The core cross-section of the cable must be
9 mm... 18 mm for an M25 cable gland.
AC1 and AC2 terminals All contact areas are free of insulation.
All levers on the terminals are in the
downward position.
All cables are securely clamped.
AC1 terminal The stand-alone grid or the Multicluster Box
is connected to the AC1 Loads/
SunnyBoys terminals.
If an external energy source is
connected, AC2 terminal
The external energy source is connected to
the AC2 Gen/Grid terminal.
For a TN system, the neutral conductor is
connected to the AC2 Gen/Grid N
terminal.
For a TT system, the neutral conductor is
connected to the AC2 Gen/Grid N
TT
terminal.
In a three-phase system,
allocation of the off-grid
inverters
The allocation of the off-grid inverters to the
line conductors of the stand-alone grid or the
Multicluster Box results in a right-hand
rotating magnetic field. Master must be
assigned to L1, slave 1 must be assigned to
L2, slave 2 must be assigned to L3.
Check item Check criterion OK Not
applicable
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