Protective Devices
| DC reverse polarity protection | Available | 
| Input-side disconnection point | DC load-break switch | 
| AC overvoltage protection" | Surge arrester type 2 | 
| DC overvoltage protection for products with production date before 09/2022 | Surge arrester type 2 | 
| DC overvoltage protection for products with production date as of 09/2022 | Surge arrester type 1+2 | 
| AC short-circuit current capability | Current control | 
| Grid monitoring | Available | 
| Maximal output overcurrent protection | 386 A | 
| Ground fault monitoring | Insulation monitoring: Riso > 36 kΩ | 
| All-pole sensitive residual-current monitoring unit | Available | 
| Active anti-islanding method | Frequency shift | 
| Arc fault detection (AFCI) | Available with STP 110-60 (AFCI) |