SUNNY ISLAND 4548-US / 6048-US

The efficient island manager: now with 20 percent more power

The new SMA Sunny Island 4548-US and 6048-US inverters are based on the proven off-grid technology in the Sunny Island 5048-US but now feature 20 percent more power output. A maximum efficiency of 96 percent ensures peak production, which results in reduced diesel usage and makes a smaller dimensioning of the PV array possible. The new Sunny Island with two different power ratings enable more flexible system sizing. And, with multicluster technology, up to 12 Sunny Islands can be integrated into off-grid power systems up 100 kW in size.


  • Max. efficiency: 96 percent
  • CEC efficiency: 94 % and 94.5 %
  • State of Charge Calculation
  • Intelligent battery management for longer battery lifespan


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


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


  • Extreme overload capacity
  • OptiCool active temperature management system
  • 5-year standard warranty

Data sheet

SUNNY ISLAND 4548-US / 6048-US - The efficient off-grid manager SUNNYIS4548_6048US-DUS161422W.pdf
  • Type: Data sheet
  • Language: English (US)
  • Number: SUNNYIS4548_6048US-DUS161422
  • Version: 2.2

Operating Instructions

Operating Manual - SUNNY ISLAND 4548-US / 6048-US SI4548-6048-US-BE-en-21W.pdf
  • Type: Operating Instructions
  • Language: English (US)
  • Number: SI4548-6048-US-BE-en-21
  • Version: 2.1

Installation Guide

Retrofit Kit SI-485PB-NR - Mounting Instructions / Equipamiento adicional SI-485PB-NR - Instrucciones de montaje SI-485PB-NR-US_en_es-10.pdf
  • Type: Installation Guide
  • Language: International
  • Number: SI-485PB-NR-US_en_es-10
  • Version: 1.0
MC-PB (US) - Mounting instructions / Instrucciones de montaje MC-PB-MO-us_en_es-10.pdf
  • Type: Installation Guide
  • Language: International
  • Number: MC-PB-MO-us_en_es-10
  • Version: 1.0


Firmware-Update 7.302/7.300 for SUNNY ISLAND 5048-US / 4548-US / 6048-US
  • Type: Firmware
  • Language: English (US)
  • Number: SUNNY_ISLAN_5048U-7302-7300E
  • Version: 7.302/7.300


  • Type: Certificate
  • Language: English (US)
  • Number: SI5048-6048-US-ZE-CoC-UL-en-10
  • Version: 1.0

White Paper

SUNNY ISLAND Generator - White Paper SIGEN-11FD1212.pdf
  • Type: White Paper
  • Language: English (US)
  • Number: SIGEN-11:FD1212
  • Version: 1.1

Technical information

Technical Information - SUNNY ISLAND 4548-US/6048-US - Safety Concept Explanation SI4548US-SI6048US-SafetyConcept-TI-en-10.pdf
  • Type: Technical information
  • Language: English (US)
  • Number: SI4548US-SI6048US-SafetyConcept-TI-en-10
  • Version: 1.0
SUNNY ISLAND 4548-US/5048-US/6048-US: Grid Backup with Generator - Digital Input TechNDIGIN-HUS123112.pdf
  • Type: Technical information
  • Language: English (US)
  • Number: TechNDIGIN-HUS123112
  • Version: 1.2
Incompatibility of SB 2000HF-US/SB 2500HF-US/SB 3000HF-US in Battery Backup and Off Grid systems (North America/-US Version) - Technical Note TECHNOTEHFBACKUPSYS-HUS125110.pdf
  • Type: Technical information
  • Language: English (US)
  • Version: 1.0
Technical Information - Battery Management of the SUNNY ISLAND - Gentle charging control for lead-acid batteries based on current state of the battery SI_Batteriemanagement-TI-en-21.pdf
  • Type: Technical information
  • Language: International
  • Number: SI_Batteriemanagement-TI-en-21
  • Version: 2.1
Lithium-Ion Batteries in Sunny Island Systems - List of Approved Lithium-Ion Batteries SI_LiIon-TI-en-29.pdf
  • Type: Technical information
  • Language: International
  • Number: SI_LiIon-TI-en-29
  • Version: 2.9
Technical Information - PV Inverters - Use of PV Inverters in Off-Grid and Backup Systems in North and South America SB-OffGrid-TI-US-en-18.pdf
  • Type: Technical information
  • Language: English (US)
  • Number: SB-OffGrid-TI-US-en-18
  • Version: 1.8


ORDER FORM - SMA WARRANTY EXTENSION - Warranty Extensions for SMA America Sunny Boy Products US SO 107-0078-001r07.pdf
  • Type: Warranty
  • Language: English (US)
  • Number: US SO 107-0078-001r07
  • Version: 7.0
  • Type: Warranty
  • Language: English (US)
  • Number: SERVICEREBATE-FUS143525
  • Version: 2.5
SMA America LLC Factory Warranty - SUNNY BOY US / SUNNY TRIPOWER US US_SO_107-0080-001r10.pdf
  • Type: Warranty
  • Language: English (US)
  • Number: US_SO_107-0080-001r10
  • Version: 10

Off-grid solutions from SMA

Our modular concepts provide the ideal technical off-grid solution for a wide range of capacities and all relevant plant types.

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Learn more about the flexible uses of our products by seeing how they are used at selected reference plants.

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