Sunny Island 4.4M / 6.0H / 8.0H

Sunny Island 4.4M / 6.0H / 8.0H Contact SMA

Proven technology

Now even more affordable

With the new generation of devices, the tried-and-tested Sunny Island battery inverters are easier and more affordable to install than ever – both in your home and in commercial applications as well as to the utility grid and in off-grid locations.

The Sunny Island has been installed more than 120,000 times worldwide. With the new generation, installers and PV system operators benefit from an even more user-friendly battery inverter.

  • Lower system costs thanks to fewer components
  • Faster installation and commissioning with a simple user interface
  • Warranty period extended to 10 years

Batteries in Sunny Island systems - List of permitted batteries

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Communicative in all areas

Thanks to its integrated user interface and standard WLAN and Ethernet interfaces, the Sunny Island can be immediately and easily configured and monitored via smartphones or tablets.

  • Uses standard Ethernet and WLAN interfaces
  • Webconnect for faster and easier PV system monitoring with Sunny Portal / Sunny Places
  • Local monitoring via web interface
  • Optimized data logging for maximum transparency, even without continuous online access
Sunny Island - Communicative in all areas

Can be used flexibly in private homes and commercial enterprises

The Sunny Island has maximum flexibility, from operation in remote off-grid areas to commercial or home energy management. It gives planners total freedom in the size and type of system, the battery and the type of energy generation. Works with self-consumption systems, battery backup systems and off-grid systems.

  • Ideal for retrofits or modular expansions of single- and three-phase systems in the 1 to 30 kW range
  • All lead-acid batteries and over 20 different lithium-ion batteries can be used
  • Can be expanded with SMA Multicluster-Technologie for systems in the 20 to 300 kW range

Always a reliable electricity supply

The Sunny Island runs reliably under even the most extreme conditions – without compromising its efficiency.

  • Exceptionally high overload capacity ensures a safe electricity supply, even in critical situations
  • IP54 for operation even in extreme environments
Always a reliable electricity supply

Possible system configurations with Sunny Island 4.4M / 6.0H / 8.0M

Single, single-phase

Single, single-phase
SI 4.4M, SI 6.0H and SI 8.0H for systems from 1kW to 8kW.

Single cluster, single-phase

Single cluster, single-phase
Up to three SI 6.0H or SI 8.0H inverters can be coupled in parallel in one phase for system from 3kW to 24kW.

Single cluster, three-phase

Single cluster, three-phase
Three SI 4.4M, SI 6.0H or SI 8.0H battery inverters can be connected each one to one phase to build 3-phase systems from 5kW to 24kW.

Multicluster, 3-phase

Multicluster, 3-phase
Three SI 6.0H or SI 8.0H battery inverters per cluster for system capacities until 300kW (up to 36x Sunny Islands).

Sunny Island 4.4M / 6.0H / 8.0H 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.
eMANUAL: SUNNY ISLAND 4.4M / 6.0H / 8.0H

The operating manual is also available as


With Sunny Design, you can plan your tailor-made PV system in just a few clicks.

Planning tool Sunny Design

With Sunny Design, you can plan your tailor-made PV system in just a few clicks.

If you have any questions, please contact SMA.

Do you have any questions?

If you have any questions, please contact SMA.