SMA Sunny Island X 50 w. LCD Three Phase 50kW Battery Inverter SI50-20

Exceptional Performance, Even in Extreme Conditions

Engineered to deliver full nominal power even at ambient temperatures up to 45°C, this robust inverter is built for challenging environments. It ensures stable load supply, smart energy management, and real-time control of energy flows, all without compromising on performance.

Smart Monitoring with Sunny Portal powered by ennexOS

Manage your energy systems more intelligently with Sunny Portal powered by ennexOS. This intuitive platform offers complete visibility of all your system components, making remote monitoring and control simple and reliable. Whether you’re tracking usage, analyzing system performance, or managing multiple inverters, you’ll always stay connected.

Key Features & Benefits

• 50kW nominal power output – Ideal for commercial and industrial solar storage systems – check 3v3rything in our solar shop

• Three-phase inverter – Ensures balanced load distribution and optimal performance

• Modular scalability – Expand AC and battery capacity as needed

• Wide battery compatibility – Works with multiple battery chemistries

• Integrated energy management – Maximizes efficiency in grid-tied systems

• Generator and grid integration – For hybrid or off-grid applications (via Connection Box)*

• Smart system monitoring – View, track, and manage energy flows via Sunny Portal

• German engineering – Manufactured to the highest quality and cybersecurity standards

• Extended warranty – 10-year coverage (5+5 years with product registration)** Extended warranty available with product registration at my.sma-service.com

Why Choose the Sunny Island X 50?

If you’re looking for a battery inverter that adapts to your energy needs, the SMA Sunny Island X 50 delivers. Whether you’re optimizing self-consumption, building energy independence, or expanding your service offering as a solar installer or reseller, this inverter ensures flexibility, reliability, and long-term performance.

Made in Germany and backed by SMA’s world-class support, the Sunny Island X 50 is an investment in the future of energy. Grid tie? You need an SMA EV charger?

Ideal For:

• Professional solar system installers

• Off-grid cabin and homestead builders

• Commercial-scale energy storage projects

• Battery resellers and renewable energy providers

• DIY solar enthusiasts building scalable solar systems

Get in touch today to learn more about the SMA Sunny Island X 50 or to request a quote tailored to your project. You need a Solplanet inverter for your solar panel system in your home? Sign in to one of our SMA webinars.

The SI50-20 represents a leap forward in SMA’s commitment to smarter, more adaptable energy solutions. As part of the Sunny Island X series, it’s designed for professionals and solar pioneers who need more than just power—they need a system that can grow, adapt, and perform under pressure.

This 50kW three-phase battery inverter is purpose-built for modern energy infrastructures, supporting everything from large-scale storage systems to remote off-grid power setups. Its architecture makes it ideal for complex installations where system design flexibility, long-term reliability, and energy independence are essential.

Thanks to its integration potential with components like the Sunny Island X Connection Box, the SI50-20 allows for hybrid configurations that combine battery storage with grid or generator input—making it a strong choice for both backup systems and standalone solar projects.

With the SI50-20, you’re not just installing an inverter—you’re building a smarter, future-ready energy backbone.