SMA Solar Technology AG Electrical Connection
Technical Description SI5048-TEN093630 37
6.3.3 AC2 (Generator/Grid)
The sub-distribution of the generator/power distribution grid is connected to the AC2 output of the
Sunny Island.
The system does not monitor additional fuses. Check any additional fuses regularly!
For connection, proceed as follows:
1. Thread the 3-pole conductor through the cable screw connection and then through the cable
conduit inside the Sunny Island.
2. Install the M25 metric-thread cable screw connection (included in delivery) onto the
"AC2 Gen/Grid" cable feed-through.
– Introduce the cable screw connection with the thread in the cable feed-through.
– Screw the counter-nut onto the cable screw connection thread on the inside of the enclosure
and tighten.
3. Remove the protective insulation from each of the 3 cables.
4. Connect PE to the "AC2 Gen/Grid" according to the label.
5. Connect N and L to the "AC2/Sunny Boys" according to the label.
Single-phase parallel system
In the case of parallel single-phase systems also connect the generator or the grid to all
slaves on AC2. The cable cross-sections and cable lengths used must be identical.
Three-phase system
Always install the master at phase L1, slave 1 at L2 and slave 2 at L3. This installation
results in a right-hand rotary field.
Cable cross-section
The maximal cable cross section for the generator is 16 mm².
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