Dc Connection With Additional Dc Distribution - SMA SUNNY BOY 5000-US Installation Manual

Electrical Connection

6.6.4 DC Connection with Additional DC Distribution

For a parallel connection of more than 1 string in front of the integrated DC disconnect, use the
COMBINED terminal on the non-grounded side.
Using the Spring Terminal labeled COMBINED
1. Insert an insulated screwdriver into the slot in the spring terminal provided.
2. Press the screwdriver upward.
☑ The spring terminal is open.
3. Feed the stripped cable into the spring terminal.
4. Pull the screwdriver back into its original position.
5. Remove the screwdriver.
☑ The spring terminal is closed and the cable is fixed.
6. Pull on the cable to check whether it is secure.
Negative Grounding
1. Connect the positive DC cable to the terminal (A)
labeled COMBINED in the DC disconnect.
2. Connect the negative DC cable (B) to the terminal
labeled PV GROUNDED in the DC disconnect.
3. Tighten all cables in the terminal blocks in the DC disconnect with a torque of 15 in‑lb. (1.7 Nm).
54 SB50US-80US-IA-en-36
SMA America, LLC
Installation Manual