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SMA Sunny Tower Commercial Grid-Tie Solar System Inverter ST42

Availability: Call For Availability

Quick Overview

  • Ideal for commercial applications

  • Designed with the installer in mind

  • Lowest specific cost $/Watt with highest efficiency

  • Combines advantages of string inverters with ease of install of a central inverter

  • Internet ready with Sunny WebBox

  • Sealed electronics enclosure and OptiCool


  • Up to 42 kW Maximum Output Power
  • Improved CEC efficiency of up to 96%
  • Prewired at factory for 3-phase utility interconnection
  • Integrated load-break rated AC/DC disconnect switch
  • Integrated fused series string combiner
  • Certified to the new UL 1741/ IEEE 1547
  • 10 year standard warranty
  • Rugged stainless steel outdoor rated enclosure

SMA Sunny Tower ST42 Inverters

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  • SMA Sunny Tower ST42 Inverters
  • commercial grid-tie inverter system
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Manufacturer Specification Sheets

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Sunny Tower Specifications

SMA Sunny Tower ST42 Specifications

Efficiency Curve

SMA Sunny Tower ST42 efficiency curve

Webbox Monitoring

Webbox Monitoring

Sunny Tower Dimensions

SMA Sunny Tower ST36 Dimensions

About Sunny Tower ST36/42 Commercial Inverter Solutions:

The SMA Sunny Tower Product line was designed for installers to optimize effort on the job site. The SMA Sunny Tower provides ease of installation, lowest specific cost ($/Watt) and the highest efficiency to maximize rebates and power production, while minimizing the overall payback period. The SMA Sunny Tower combines the performance advantages of string inverters with the installation ease of central inverters. Because of the SMA Sunny Tower modular design, the product can be installed without the use of heavy equipment which allows any installer with residential experience to successfully install commercial grade systems leveraging the experience and tools on hand. The SMA Sunny Tower is available in 36 kW and 42 kW models and multiple Sunny Towers can be used together on a single system. SMA Sunny Towers are available with a built-in Sunny Webbox enabling them as internet ready. The SMA Sunny Tower places commercial installations within easy reach of any installer while providing the performance and reliability you’ve come to expect from SMA.

SMA Sunny Tower Commercial


SMA Sunny Tower example