Installation Instructions
Electrical Connection SMA Solar Technology AG
24 SB11_12_17-IEN100132 Installation Guide
Connection Procedure
1. Pull the Electronic Solar Switch downwards, slightly
towards the wall.
2. Check the connection cables of the PV modules for
correct polarity and compliance with the Sunny
Boy's maximum input voltage of 400 V (DC).
3. Check the strings for ground faults, as described in section 9.1.1 "Checking the PV Generator
for Ground Fault" (page36).
DANGER!
Danger to life due to high voltages in the Sunny Boy!
• Before connecting the PV generator, ensure that the line circuit breaker is switched
off.
NOTICE!
Exceeding the maximum input voltage can destroy the Sunny Boy!
If the voltage of the PV modules exceeds the maximum input voltage of the Sunny Boy, it
can be destroyed by the overvoltage. All warranty claims become void.
• Do not connect strings to the Sunny Boy with open circuit voltage greater than the
maximum input voltage of the Sunny Boy.
• Check the system design.
DANGER!
Risk of lethal electric shock!
• Do not connect strings with ground faults.
• Firstly, clear the ground fault in the respective string.