SMA Technologie AG Electrical Connection
Installation Guide SB40TL_50TL-IEN081211 29
Cable requirements
The PE wire must be 5 mm longer than the L and N wires!
Connection procedure
1. Test the grid voltage and compare it with the permitted voltage range (see section 4
„Technical Data” (Page 12)).
2. Switch off the line circuit breaker and secure it to prevent it being reactivated.
3. Remove the Electronic Solar Switch.
WARNING!
Risk of lethal burns!
When a generator (Sunny Boy) and a consumer are connected to the same line circuit
breaker, the protective function of the line circuit breaker is no longer guaranteed. The
current from the Sunny Boy and the grid can add up to overcurrent which is not detected
by the line circuit breaker.
• Never connect consumers between the Sunny Boy and the line circuit breaker
without protection.
• Always install separate fuses for consumers.
External
diameter
Wire
cross-section
PE
L
N
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