SMA Solar Technology AG 6 Electrical Connection
Installation Manual SI80H-60H-OffGrid-IA-en-11 67
Additionally required material (not included in scope of delivery):
☐ 4 bootlace ferrules
1. Connect the electricity grid and generator to the transfer switch.
2. Connect the AC2 terminal of the off-grid inverter to the transfer switch
(see Section 6.10"Connecting an External Energy Source",page43).
3. Connect the cable for the auxiliary contact to the transfer switch. Ensure that the AC2 terminal
is connected to the electricity grid when the auxiliary contact is open.
4. Connecting the cable for the auxiliary contact to the off-grid inverter:
• Break through the cable feed-through plate at a suitable position using a sharp object.
• Strip the insulation from the cable for the auxiliary contact and press bootlace ferrules onto
the two wires.
• Lead the cable through the hole in the cable feed-through plate into the off-grid inverter.
• Connect one wire to the BatVtg+ terminal with the 4-pole terminal
(torque: 0.5 Nm ... 0.6 Nm).
• Connect one wire to the DigIn+ terminal with the 4-pole terminal
(torque: 0.5 Nm ... 0.6 Nm).
•Connect the BatVtg– terminal to the DigIn– terminal (torque: 0.5 Nm ... 0.6 Nm).
Use the same conductor as in the cable for the auxiliary contact.
Destruction of the off-grid inverter due to abrupt switching from electricity grid to
generator and vice versa
• Ensure that the off-grid inverter is disconnected from the electricity grid and the generator for
at least five seconds between all switching operations.
• Contact the SMA Service Line if you require a switching concept for a transfer switch.
Requirements for operation on the electricity grid
The off-grid inverter does not meet the requirements for operation on the electricity grid in many
countries.
• Ensure that the applicable local standards and requirements are met.
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