Sunny Island 3.0M / 4.4M

The custom-fit solution for small
on-grid and off-grid solutions

The Sunny Island 3.0M/4.4M is the perfect product solution for stand-alone and grid-connected systems with a power output range of 2 to 13 kW.

Furthermore, being a core element in the SMA Flexible Storage System, the Sunny Island stores generated solar power and works with the Sunny Home Manager 2.0 to manage home energy consumption intelligently.

With its high protection class, wide temperature range and overload capacity, the Sunny Island provides the kind of reliability needed for off-grid use. The intelligent load and energy management ensures operation even in critical situations, such as in the event of high inrush currents or harsh ambient conditions.

SUNNY ISLAND 3.0M / 4.4M - flexible


The 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.
  • For new and existing PV systems
  • Can be retrofitted for single- and three-phase systems
SUNNY ISLAND 3.0M / 4.4M - Intelligent


In the SMA Smart Home, the Sunny Home Manager 2.0, with the Sunny Island, takes control of intelligent management between the PV system, appliances and storage systems as well as regulates all energy flows.

SUNNY ISLAND 3.0M / 4.4M - robust


The 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 3.0M / 4.4M FAQs

  • How can I use the Sunny Island to become less dependent on rising electricity costs?
    How do my home appliances keep running even when there is a grid failure?
    Our planning guidelines provide the answers you need.
  • What does my optimal PV system with the Sunny Island look like?
    With the SMA Sunny Design planning software, you can configure your system to fit your personal needs in just a few steps.
  • How do I install the grounding for a stand-alone grid?
    Which PV inverter is suitable for my stand-alone grid?
    Which lithium-ion batteries are compatible?
    You can find the answers to your questions in our useful manuals.

Sunny Remote Control

Speedwire data module / Modbus TCP

Load-shedding protection

RS485 Piggy-Back

Plant monitoring and communication with Piggy-Back

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.

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

Battery cable sets

Sensor Resistors

Replacement battery temperature sensor