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SMA SUNNY ISLAND SI 4548-US 4500W 48V Off-Grid Inverter Smar

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Sunny Island 4548-US | The efficient off-grid manager
The SMA Sunny Island 4548-US and 6048-US inverters are based on proven off-grid technology and feature industry leading power output. A maximum efficiency of 96 percent ensures peak production, which results in reduced diesel usage in rural communities. More flexible sizing allows for simplified system planning. And, with multicluster technology, up to 12 Sunny Islands can be integrated into off-grid power systems up 110 kW in size.

The Sunny Island is a bidirectional inverter (battery inverter and battery charger) for off-grid systems. The Sunny Island supplies loads on the stand-alone grid side and charges the batteries with the energy from grid-feeding units connected on the AC side.

SMA SUNNY ISLAND SI 4548-US 4500W 48V Off-Grid Inverter Smartformer Compatible

• Sunspec Certified

Maximum efficiency 96%
CEC efficiency of 94.5%
Charge level calculation
Intelligent battery management


Easy commissioning with the "Quick Configuration Guide"
Complete off-grid management
Excellent for grid-tied battery back up


For Sunny Island systems from 2 kW to 100 kW
Single, 120/240 split-phase and three-phase operation, connectable in parallel and modularly expandable


Extreme overload capability
OptiCool™ active temperature management system
5-year standard warranty


  • Manufacturer: SMA
  • Model: SI 4548-US-10
  • Rated Power Output [W]: 4500
  • Length [mm (in)]: 615 mm (24 in)
  • Width [mm (in)]: 470 mm (18.5 in)
  • Depth [mm (in)]: 240 mm (9 in)

Surge/Lightning Protection



      • Inverter Type: Grid-Tie String Inverter
      • Maximum/Peak Efficiency [%]: 208V:96.9%/ 240V:96.8%/ 277V:97%
      • Transformer / Transformerless: Transformer
      • DC Power Rating [W]: 6000
      • Nom. DC Voltage [V]: 310
      • Max. Input Power [W]: 6350
      • Max. Input Voltage [V]: 600
      • Min. DC voltage / start voltage [V]: 250V/ 300V
      • Min. DC voltage / start voltage [V]: 250V/ 300V
      • Number of MPP Trackers: 1
      • Voltage Upper Limit for MPP Range [V]: 480V
      • DC Disconnection Type: 4
      • AC Power Rating [W]: 6000
      • Max. AC Power [W]: 6000
      • AC voltage range [V]: 208V:183-229V/ 240V:211-264V/ 277V:244-305V
      • AC grid frequency [Hz]: 60
      • Max. output current [A]: 208V:29A/ 240V:25A/ 277V:22A
      • Maximum AC Voltage Range [V]: 208V:229V/ 240V:264V/ 277V:305V
      • AC Disconnect: true
      • Sleep (Night) Consumption [W]: .1
      • CSI-Approved Built-in Meter: true
      • NEMA Enclosure Rating: NEMA 3R
      • Cooling Method: OptiCool
      • Ambient Temperature Range [°C(°F)]: -25°C - 45°C (-13°F - 113°F)
      • Display: Text Line
      • Communication: RS485/Bluetooth optional
      • Basic Warranty [Years]: 10
      • Warranty Extension Options [Years]: 15, 20
      • Grid Standard: IEEE1547
      • Compliances: UL1741 (Second Ed.), UL1998, UL1699B, IEEE 1547, FCC Part 15 (Class A & B), CSA C22.2 No. 107.1-2001
      • AC grid range [Hz]: 59.3-60.5Hz
      • Max. recommended PV power (@ module STC): 7500

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