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

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


SMA Off-Grid Solutions OGS_INFO-AEN120510W.pdf
  • Type: Brochure
  • Language: English (Worldwide)
  • Number: OGS_INFO-AEN120510
  • Version: 1.0
SUNNY ISLAND System Guide - System Solutions for Reliable Off-Grid Power Supply SISYSGUIDE-KEN140421.pdf
  • Type: Brochure
  • Language: English (Worldwide)
  • Number: SISYSGUIDE-KEN140421
  • Version: 2.1

Technical information

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
  • Type: Technical information
  • Language: English (Worldwide)
  • Number: INFOOFFGRID-TI-en-15
  • Version: 1.5
Batteries in Sunny Island Systems - List of Approved Batteries SI_LiIon-TI-en-31.pdf
  • Type: Technical information
  • Language: International
  • Number: SI_LiIon-TI-en-31
  • Version: 3.1

Technology Brochures

TechnologyBrochure 6 - Battery Management in Off-Grid Systems TECHBATT-AEN114414.pdf
  • Type: Technology Brochures
  • Language: English (Worldwide)
  • Number: TECHBATT-AEN114414
  • Version: 1.4

Planning guidelines

Planning Guidelines - Design of Off-Grid Systems with Sunny Island 3.0M / 4.4M / 6.0H / 8.0H Devices Designing-OffGridSystem-PL-en-22.pdf
  • Type: Planning guidelines
  • Language: International
  • Number: Designing-OffGridSystem-PL-en-22
  • Version: 2.2