Grounding - SMA S Technical Description

Electrical Connection of the Sunny Backup 2200
7.3.1 Grounding
CAUTION!
Risk of injury from high leakage currents against PE.
The N connection of the Sunny Backup 2200 has NOT been connected with PE by default.
• Before commissioning the Sunny Backup 2200, be sure to externally ground the
Sunny Backup System S (see section7.3.3 „AC2 (Load Meter)" (59)).
• For safety reasons (leakage currents exceeding 3.5 mA), connect two protective
earth conductors (redundant grounding).
Redundant grounding is only available if the Sunny Backup System S is properly installed.
1. The first ground connection is made using the protective earth conductor from the PV feed-in
counter to the Sunny Backup 2200 via the Automatic Switch Box S.
2. The second ground connection is routed as a protective earth conductor from the power supply
counter to the Sunny Backup 2200.
Route the two separate protective earth conductors in the electrical distribution to the equipotential
bonding bar.
56 SBU2200-TEN083320
SMA Solar Technology AG

Grounding 2

Grounding 1
Technical Description