Connecting The Inverter To The Utility Grid - SMA SUNNY BOY STORAGE 3.7 Operating Manual

SMA Solar Technology AG
6.2.2

Connecting the Inverter to the Utility Grid

Requirements:
☐ The connection requirements of the grid operator must be met.
☐ The grid voltage must be within the permissible range. The exact operating range of the
inverter is specified in the operating parameters.
Procedure:
1. Disconnect the AC circuit breaker and secure it against reconnection.
2. Remove the adhesive tape from the enclosure opening for the AC connection.
3. Insert the cable gland into the opening and tighten it with the counter nut from the inside.
4. Guide each cable into the inverter. In the process, lay each cable in such a way that they do
not come into contact with the communication assembly.
5. Connect the grounding conductor to the grounding terminal:
• Strip off the conductor insulation by 18 mm.
• Insert the screw through the spring washer, the clamping bracket and the washer.
• Guide the conductor between the washer and clamping bracket and tighten the screw
(TX 25) (torque: 6 Nm ± 0.3 Nm).
6. Plug the terminal block for the AC connection in the
AC-out slot in the inverter, and tighten it with a flat-
blade screwdriver (blade width: 3.5 mm) (torque:
0.3 Nm).
7. Ensure that the terminal block is securely in place and the screws are tightened.
8. Thread the conductors L and N through the ferrite.
9. Strip off the conductor insulation of L1 and N 18 mm.
10. In the case of fine stranded wire, provide the conductors with a bootlace ferrule.
Operating manual
6 Electrical Connection
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