SMA Sunny Boy 8 kW Grid-Tie Inverter

The SMA Sunny Boy 8000US-12 is an 8000-watt, single-phase grid-tie central inverter featuring integrated Arc-Fault Circuit Interrupter (AFCI) protection. As noted directly in the manufacturer's technical documentation, the US-series inverters ship with gray lids.

Input (DC) Specifications

• Max. Recommended PV Power: 10,000 W

• Max. DC Input Voltage: 600 V

• Peak Power Tracking (MPPT) Range: 300 V – 480 V

• Min. PV Start Voltage: 365 V

• Max. DC Input Current: 30 A

• Fused String Inputs: 4 x 20 A inside the included SMA DC-Disconnect switch

Output (AC) Specifications

• Max. Continuous AC Output Power: 8000 W

• Nominal AC Voltages Supported: 240 V / 277 V single-phase (Note: 208V is excluded on the 8000US)

• AC Voltage Range: 211 V – 264 V (for 240 V) | 244 V – 305 V (for 277 V)

• Max. AC Output Current: 32 A (at 240 V) | 29 A (at 277 V)

• Nominal AC Frequency: 60.0 Hz

Mechanical & Physical Data

• Inverter Dimensions (W x H x D): 18.5" x 24" x 9" (470 x 615 x 240 mm)

• DC Disconnect Dimensions (W x H x D): 7" x 12" x 7.5" (187 x 297 x 190 mm)

• Inverter Weight: 141 lbs (64 kg)

• DC Disconnect Weight: 8 lbs (3.5 kg)

• Enclosure Rating: NEMA 3R (suitable for indoor/outdoor mounting)

• Cooling System: OptiCool active forced-air cooling management

Efficiency & Certifications

• Max. Efficiency: 97.3%

• Galvanic Isolation: Yes (Low-frequency transformer design)

• Compliance: UL 1741, IEEE 1547, CSA C22.2 No. 107.1-01

• Safety Features: Integrated Ground Fault Detection & Interruption (GFDI) and Arc-Fault Circuit Interrupter (AFCI) compliant with NEC requirements.