Fronius Worldwide
International Websites
Solar Energy
Home owners Business owners Installers & partners About us
Popular search terms
WattpilotGen24SymoPrimoSmart meterOhmpilotDatamanagerWarrantyCommissioningMonitoring
Find sales partners
Fronius partner programme
Trainings & webinars
Warranty extensions

The current page does not exist in the target language.

Do you want to change the language and go to the home page or do you want to stay on the current page?

Change Language
Products & solutions
Inverters & energy solutions
GEN24 - inverter with backup functionality SnapINverter - Fronius Primo SnapINverter - Fronius Symo Fronius Datamanger
Monitoring & Digital Tools
Solar.web - Monitoring & Analysis Solar.SOS - quick & simple Online Support Solar.start - simple commissioning Solar.creator - professional system design Repowering - modernize PV-system
Features & more Active Cooling Technology Backup power - independent with solar power Dynamic Peak Manager - shade management Repowering - make a fresh start SunSpec rapid shutdown SuperFlex design Connecting Energy - open interfaces & systems Symo Advanced UL 3741 certified
Technical data
Inverters
Primo GEN24 Primo Symo Symo Advanced Primo GEN24 Plus
Monitoring Datamanager 2.0 Smart Meter WR Sensors Sensor Card / Box Open Interfaces
Accessories Accessories Smart Meter Inverter accessories Rapid Shutdown Box MC4 Connectors Shade Cover
Overview
Info center
Blog
Events
References
News
Service & support
Technical Support
Warranties woman in the sun
Partner Program
Downloads
Contact
How can we help you?
Your initial contact
Fronius USA LLC
Headquarters
6797 Fronius Drive
Portage, IN 46368, USA
pv-sales-usa@fronius.com
T: 219.734.5500
Solar Energy
Installers & partners

Solar Energy

Installers & partners
  • International Websites
    • Fronius International - English
    • Fronius International - Deutsch
  • Africa and Middle East
    • مصر
    • الأردن
    • الكويت
    • لبنان
    • سلطنة عمان
    • دولة قطر
    • المملكة العربية السعودية
    • South Africa
    • الإمارات العربية المتحدة
  • Asia and Pacific
    • Australia
    • 中國
    • 香港
    • India
    • 日本
    • 대한민국
    • 新加坡
    • Taiwan (ROC)
    • ประเทศไทย
  • Europe
    • Österreich
    • Česká republika
    • Danmark
    • Deutschland
    • Eesti
    • Finland
    • Ελλάδα
    • España
    • France
    • Italia
    • Magyarország
    • Nederland
    • Norge
    • Polska
    • Portugal
    • Schweiz
    • Slovensko
    • Slovenija
    • Sverige
    • Türkiye
    • Україна
    • United Kingdom
  • North and Latin America
    • Argentina
    • Brasil
    • Canada
    • Chile
    • Colombia
    • Costa Rica
    • Ecuador
    • México
    • Panama
    • Peru
    • Uruquay
    • USA
    • Venezuela

Fronius Symo Advanced is UL 3741 certified

What is UL 3741?

UL 3741 is a solution to the NEC 690.12 requirement of module level rapid shutdown within a photovoltaic (PV) solar system.  According to UL’s website, UL 3741 provides “a means of evaluation for PV hazard control components, equipment and systems that reduce shock hazards from energized PV system equipment and circuits in a PV array. It is specifically intended to establish and expand requirements for the evaluation of a rapid-shutdown PV array that can keep firefighters out of hazardous current paths when responding to emergency situations in homes and buildings with PV systems.”

NEC 690.12 background

2020 NEC 690.12 Rapid Shutdown of PV Systems on Buildings requires that all PV arrays installed on buildings shall include rapid shutdown functions to reduce shock hazard for Fire Fighters in accordance with 690.12 (For further information regarding NEC 690.12, refer to manufacturer’s website)

The solution

Fronius Symo Advanced

The Fronius Symo Advanced string inverter is UL 3741 certified for use with listed flat roof systems when the inverter is installed within the 1 ft array boundary. This certification eliminates the need for module level rapid shutdown devices. When modules are properly mounted with either of these UL 3741 approved PV Hazard Control commercial installation systems, the Fronius Symo Advanced is NEC 690.12 compliant.

 

All mounting systems are UL 3741 certified according to 2023 NEC 690.12 Controlling Conductors within the array boundary (Also compliant with the 2017 and 2020 versions of the NEC). 

 

 

 

UNIRAC®

UNIRAC® Flat Roof Systems (RM10 EVO, RM10 LEGACY, RMDT, RM5, ECOFOOT 2+, ECOFOOT 5D, GRIDFLEX 5) are UL 3741 Listed systems that comply with NEC 690.12 when installed by qualified persons per the installation procedures outlined in the UNIRAC® UL 3741 Installation Guide.

 

For installation instruction manuals, procedures and product requirements, click the link below to be directed to manufacturer’s website

More about UNIRAC®

 

 

 

    

IRONRIDGE®

The BX Ballasted flat roof Photovoltaic Hazard Control System (PVHCS) is a UL 3741 Listed system that complies with NEC 690.12 when installed by qualified installers per the installation procedures outlined in the BX System Installation Manual.

 

For installation instruction manuals, procedures and product requirements, click the link below to be directed to manufacturer’s website.

More about IRONRIDGE®
For more insight into this UL 3741 solution, watch our webinar: Navigating Rapid Shutdown with Fronius and IronRidge®
Click here to access the webinar

 

 

 

PANELCLAW®

The clawFR Photovoltaic Hazard Control System (PVHCS) is a UL 3741 Listed system that complies with NEC 690.12 when installed by qualified persons per the installation procedures outlined in the clawFR System Installation Manual.

 

For installation instruction manuals, procedures and product requirements, click the link below to be directed to manufacturer’s website.

More about PANELCLAW®

 

 

 

 

 

 

 

 

 

SCHLETTER®

The FixGrid Pro flat-roof mount is a UL 3741 Listed system that complies with NEC 690.12 when installed by qualified installers per the installation procedures.

 

For installation instruction manuals, procedures and product requirements, click the link below to be directed to manufacturer’s website.

More about SCHLETTER®

 

 

 

AEROCOMPACT®

The SN2 and COMPACTFLAT S bracket-based flat roof system are UL 3741 Listed systems that comply with NEC 690.12 when installed by qualified persons per the installation procedures listed on the manufacturers instructions.

  • Module sizes up to 98.4 in x 51.60 in / 1310 x 2500 mm
  • Low point loads
  • Short-side and long-side clamping
  • High wind and snow loads
  • Versatile system with few components
  • Preassembled components, plug & play
More about AEROCOMPACT®

 

 

 

Aerocompact
Aerocompact
    
    

Fronius rooftop solution

It is required by Fronius USA, in accordance with our installation manual, that the Fronius Shade Cover be used when the Fronius Symo Advanced is installed in direct sunlight.

 

This solution allows you to:

  • Place inverter next to array
  • Lay flat or tilt up

 

Benefits:

  • Protects from harsh weather conditions
  • Keeps inverter’s temperature low and performance high
  • UL 3741 code compliance
    


Disclaimers

  • Fronius is not affiliated with Esdec Solar Group
  • PanelClaw® and IronRidge® are not Fronius products
  • Fronius is not responsible for installation or support of PanelClaw® or IronRidge® racking systems. It is the installer’s responsibility to comply with all applicable national, state or local codes, procedures, and product and safety standards, follow installation instructions provided by manufaturer, use recommended parts, and ensure proper electrical requirements. For more information about installer’s responsibilities, visit the manufacturer’s website. (LINKS ABOVE)
  • The Fronius Symo Advanced is the only Fronius inverter that is certified under UL 3741.  This certification does not include the Primo or Symo models.