SMA Inverter / Chargers

SUNNY ISLAND 4.4M / 6.0H / 8.0H

The all-rounder for high-performance stand alone and self-consumption on-grid solutions
SMA Sunny Island.jpg

The SMA Sunny Island 4.4M / 6.0H / 8.0H supports a wide range of on-grid and off-grid applications in the 3 to 25 kW range - from operation in remote off-grid areas to home energy management.

Furthermore, being a core element in the SMA Flexible Storage System for new and existing PV systems, it stores generated solar power and works with the Sunny Home Manager to manage home and commercial energy consumption intelligently.

Its high protection class, wide temperature range and exceptional overload capacity provide the kind of reliability needed for off-grid use. Intelligent load and energy management keeps the system running even in critical situations.


The SMA Sunny Island offers flexibility in terms of combination with other equipment, which means that the system can be configured precisely to meet the applicable power requirements.

  • Choice of battery: The Sunny Island is compatible with many well-known brands of lithium-ion battery and all lead-acid batteries.
  • Can be retrofitted for single- and three-phase systems
  • Increase system size at any time with SMA multicluster technology


In the SMA Smart Home, the Sunny Home Manager, with the SMA Sunny Island, takes control of intelligent management between the PV system, appliances and storage systems as well as regulates all energy flows.

  • Comprehensive visualization in the Sunny Portal
  • Forecast-based charging
  • Simple planning using planning guidelines and Sunny Design


The SMA Sunny Island is impervious to fine desert sand, high humidity in rainforests and salty mist in coastal regions as well as significant temperature fluctuations. It runs reliably under the most extreme conditions—without compromising its efficiency.

  • Outdoor installation possible thanks to IP 54
  • Wide temperature range
  • Can switch any appliance on

  Sunny Island 4.4 M Sunny Island 6.0 H Sunny Island 8.0H
AC Input (Grid or generator)
Voltage 230 Vac (172,5 to 264,5 Vac)
Frequency 40 Hz (40 to 70 Hz)
Maximum AC current for increased self-consumption 14,5 A 20 A 26 A
Maximum AC power for increased self-consumption 3,3 kVA 4,6 kVA 6 kVA
Maximum AC input current 50 A 50 A 50 A
Maximum AC input power 11500 W 11500 W 11500W
AC Input (Stand-alone or emergency power operation)
Voltage 230 Vac (202 to 253 Vac)
Frequency 50 Hz (45 to 65 Hz)
Rated grid voltage / AC voltage range 14,5 / 60 A 20 / 120 A 20 / 120 A
Rated power (Unom/fnom/25 °C/cos φ=1) 3300 W 4600 W 6000 W
AC power at 25°C for 30 min / 5 min / 3 s 4400 / 4600 / 5500 W 6000 / 6800 / 11000 W 8000 / 9100 / 11000 W
AC power at 45°C permanently 3000 W 3700 W 5430 W
THD / power factor at rated power < 5% / -1 to 1 < 1,5% / -1 to 1
Battery DC input
Voltage 48 V (41 to 63 V) 48 V (41 to 63 V) 48 V (41 to 63 V)

Maximum charging / rated / discharging current

75 / 63 / 75 A 110 / 90 / 103 A 140 / 115 / 130 A
Battery type Li-Ion*, FLA, VRLA
Battery capacity

100 Ah a 10000 Ah (plomo)

50 Ah a 10000 Ah (Li-ion)

Charge control IUoU charge procedure with automatic full charge and equalization charge
Efficiency / self-consumption of the device
Maximum efficiency 95,5 % 95,8 %
No-load consumption / standby 18 / 6,8 W 25,8 W / 6,5 W
AC short-circuit Yes Yes Yes
AC overload Yes Yes Yes
DC reverse polarity protection No No No
DC fuse No No No
Overtemperatures Yes Yes Yes
Battery deep discharge Yes Yes Yes
Overvoltage category as per IEC 60664-1 III III III
General Data
Dimensions ( w x h x d) 467 x 612 x 242 mm
Weight 44 Kg 63 Kg
Operating temperature range -25º C to 60º C
Protection class as per IEC 62103 I
Climatic category as per IEC 60721 3K6
Degree of protection as per IEC 60529 IP54
Features / function
Three-phase systems Yes Yes Yes
Battery backup function Yes Yes Yes
State of charge calculation / full charge / equalization charge Yes Yes Yes
Battery temperature sensor Yes Yes Yes
Data cables Yes Yes Yes
Warranty 5 years
Features / function for off-grid applications
Automatic rotating magnetic field detection Yes Yes Yes
Generator support Yes Yes Yes
Parallel connection Yes Yes Yes
Multicluster Yes Yes Yes
Integrated soft start Yes Yes Yes
Accesories for off-grid applications
Battery fuse ** Optional
Interface SI-COMSMA (RS485) Optional
Interface SI-SYSCAN (Multicluster) Optional
Interface SWDMSI-NR (Speedwire) Optional
Sunny Island Charger SIC50-MPT** Optional
Cluster controller Optional
Accesories for on-grid applications (self-consumption)
Interface SI-COMSMA (RS485) Optional
Interface SWDMSI-NR (Speedwire) Optional
Sunny Home Manager Optional
SMA Energy Meter Optional
Automatic transfer switch for battery backup** Optional


* See List of Approved Lithium-Ion Batteries.

** Procurement via external supplier.

Speedwire data module / Modbus TCP

SMA Speedwire data module / Modbus TCP For smooth communication: Speedwire can be used to access PV systems via Sunny Explorer. Device configuration and parameter checks are easy and convenient. In addition, with Modbus all parameters can be viewed remotely or set automatically. And setpoints can be entered for direct control of Sunny Island output.

Load-shedding protection

SMA Load-shedding protection

Load-shedding protection for use in AC-coupled off-grid systems: disconnecting loads during power overloads allows the batteries to recharge – e.g. from the PV plant. To ensure that the protection doesn't drop out due to a short circuit, only DC contactors that are supplied by the battery are used.

For all available Sunny Island we offer a 3-pole load-shedding contactor with 100 A nominal current with 48 V DC coil 


Compatible versions are available for all Sunny Island models.

RS485 Piggy-Back. Plant monitoring and communication

SMA RS485 Piggy-Back. Plant monitoring and communication The RS485 wiring for plant monitoring and communication allows functional lengths of up to 1200 meters. The Sunny WebBox collects all the data and informs you about the status of the PV plant. With Piggy-Back the data transmission is reliable even in interference-prone areas. Subsequent expansions are possible without problem thanks to the modular design principle.

Multicluster Piggy-Back

SMA Multicluster Piggy-Back

For communication in Multicluster systems, one Piggy-Back is required per cluster. The Piggy-Backs are also equipped with an RS 485 interface for the SMA Monitoring Bus. Scope of delivery includes data cable for indoor use.


Compatible with Sunny Island 5048.

Sunny Island Charger Piggy-Back

  SIC-Piggy-Back for a smooth communication between Sunny Island Charger and Sunny Island via the sync bus of the Sunny Islands.

Adapter cable

  Adapter cable for using the RS485-communication between Sunny Island and Sunny WebBox.

Battery fuse boxes (BatFuse B.01 and B.03)

SMA Battery fuse boxes (BatFuse B.01 and B.03)

External DC distributor for all-pole battery fuse protection. Both types are suitable for currents from 63 to 250 A and feature an NH fuse-switch disconnector for simple activation of the Sunny Island. BatFuse B.01 provides one connection for Sunny Island and three DC connections on the battery side. BatFuse B.03 features three connections for Sunny Island and six DC connections on the battery side. Both types also have an 8A auxilliary supply output from the battery.


Compatible with all Sunny Island models.

Battery cable sets


Cables for the DC connection between the battery, BatFuse and Sunny Island - or the direct connection between the battery and inverter. The double insulation enables ground-fault-proof and short-circuit-proof installation. Approved for cable temperatures up to 90°C.


- 70 mm² for Sunny Island 4.4M / 6.0H and 8.0H in 3 and 6 meters long


Measuring shunts for battery current detection. Suitable for use with generators or loads that cannot be measured by the Sunny Island. Battery shunts are available for maximum DC currents of 200 and 600 A.


Compatible with Sunny Island 4.4M / 6.0H and 8.0H.

Replacement battery temperature sensor

  Replacement battery temperature sensor tyep KTY with 10 m connection cale for Sunny Island.


Sunny Island, Li-Ion approved batteries

SMA Multicluster 12 for Sunny Island

  • SMA Sunny Island.jpg
  • SMA Sunny Island 2.jpg

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