The SMA Sunny Island SI 4.4M-13 inverter is single-phase and designed for off-grid and hybrid energy storage systems. It has a rated power of 4,400 W and supports peak power of 4,400 W for 30 minutes, 4,600 W for 5 minutes, and 5,500 W for 3 seconds. It supports connection to three-phase systems, parallel operation, and multi-cluster operation.

It includes protection against short circuits, overload, overheating, and deep battery discharge, as well as a soft-start system. It supports a generator and features a battery temperature sensor, state-of-charge calculation, full-charge and equalization functions, and communication interfaces for smart management.

• Rated input voltage: 48 V
• Rated power: 4,400 W
• Peak power: 4,400 W for 30 minutes, 4,600 W for 5 minutes, 5,500 W for 3 seconds
• Power supply: Single-phase
• Grid voltage: 230 V
• Operating frequency: 50/60 Hz
• Rated current: 14.5 A (On-Grid)
• Maximum output current: 60 A
• Maximum input current: 50 A
• Maximum input power: 11.5 kW
• Maximum charging current: 75 A
• Efficiency: up to 95.5%
• No-load consumption: 18 W
• Standby consumption: 6.8 W
• Protection rating: IP54
• Dimensions: 467 × 612 × 242 mm