Fronius unveils new generation of rapid shutdown boxes

Fronius launches a new generation of its Rapid Shutdown Box, offering the most convenient solution for NEC 2014 (690.12) and NEC 2017 (Array Disconnect) compliance, while enhancing overall rooftop and firefighter safety. The new generation includes two versions: the Fronius Rapid Shutdown Box Duo and Quattro.


NEC 2014 requires PV system conductors away from the array to be brought down to a safe level so that firefighters can have assurance that they will not be exposed to potentially lethal voltage during firefighting operations. The National Electrical Code instructs us that the DC “homerun” conductors must be at no more than 30V and within 30 seconds of rapid shutdown initiation. The same requirement is in effect for NEC 2017 (Array Disconnect, until January 1st of 2019).

We hosted a webinar on this very system — which you can still listen to here.

The second generation of the Fronius Rapid Shutdown Box provides installers with an even more convenient solution for this code requirement. “Based on customer feedback, we implemented many improvements into this new generation of our Rapid Shutdown Box”, says Michael Mendik, Head of Solutions Management at Fronius USA. “The low-profile design, as well as installer-friendly mounting and wiring options, make this solution the most convenient and cost effective one on the market”.

Directly connected to the inverter through the same conduit as the DC homeruns and powered by the array, the Fronius solution minimizes the number of components and eliminates the need for an external power supply. The low-profile design and the multiple mounting options allow for installation underneath the modules, ensuring a clean system look. In addition, the NEMA 4X rating ensures the box is built for severe outdoor conditions. MC4 connectors, spring loaded terminals and generous wiring space make the wiring a breeze. The Rapid Shutdown Box can also act as a combiner box, replacing a standard junction box, keeping the number of components low.

The new generation consists of two version. The smaller Fronius Rapid Shutdown Box DUO, for up to two strings, and the bigger Fronius Rapid Shutdown Box QUATTRO, for up to 4 strings. Both versions are compatible with all Fronius SnapINverters in systems up to 600 V (excluding the Fronius Symo 15.0 208 V).

Shipping of the Fronius Rapid Shutdown Box Duo (for up to 2 strings) starts as of now. The Fronius Rapid Shutdown Box Quattro (for up to 4 strings) starts shipping in November. Fronius continues to offer the existing Rapid Shutdown Box Multi (also for up to 4 strings) until the new Quattro version is available.

— Solar Builder magazine

Tigo’s TS4 MLPE platform earns UL certification for meeting rapid shutdown regs

tigo ts4 mlpe rapid shutdown

Underwriters Laboratories (UL) has certified Tigo‘s UHD-Core TS4-S for fully complying with National Electric Code (NEC) 690.12 Rapid Shutdown regulations. The TS4-S joins the UL Certified status of Tigo’s TS4-L (Long Strings) and TS4-O (Optimization) announced last February; all products are currently shipping.

The UL Certification now applies to 600V, 1000V, and 1500V PV system designs with Tigo’s TS4 MLPE modular platform using any type of module with a maximum output power of 475W. The built-in automatic over voltage and over temperature protections continue to reduce liability and improve the safety of installers, customers, and first responders in case of emergency.

“Tigo’s UL Certification enables our partners to meet NEC demands like module-level shutdown now, while also offering the most cost effective and flexibly designed systems on the market,” said Zvi Alon, CEO of Tigo. “

To see Tigo’s TS4 platform with a Sunpreme bifacial smart panel, visit Booth 8401 at Intersolar North America’s Exhibition in San Francisco on July 11-13, 2017.

Get to know NEC 2017 revisions: Updated PV labels, rapid system shutdown


— Solar Builder magazine

New PV labeling rules in effect, Graphic Products releases guide to cover them all

With the number of solar installations rapidly rising, consistent and accurate safety labels are essential to communicate the hazards that vendors, contractors and emergency responders face. Graphic Products new online Solar Photovoltaic (PV) Labeling Guide. This new solar labeling guide is complimentary and instantly downloadable.

New regulations for solar labeling are in effect for 2017, and solar installers need to understand and include critical information on labels for PV generation systems. The 2017 revision of the National Electrical Code (NEC) has streamlined solar labeling requirements in an effort to improve compliance and safety. This guide goes through these specific changes, too.

PV labels NEC 2017

New Label

Here’s a deep dive into a lot of the updates.

Solar labeling is especially important for firefighters who must identify hazards, installation type and emergency shutoff location during an emergency. In response, NEC 2017 closely aligns with the 2015 International Fire Code (IFC), specifying label format, size, location, and content, so firefighters can quickly identify the information they need to stay safe when responding to an emergency.

Types of Installations Needing Solar PV Labels

In this guide, installers working with interconnected power systems, standalone PV systems, back-fed overcurrent protection devices, circuit conductors, and many more systems will have labeling text, color and size requirements illustrated for quick reference. It also covers proper materials for solar labels.

With DuraLabel printers and supplies, users have the flexibility to create labels not only compliant with NEC’s requirements but also with codes specific to each state and municipality. DuraLabel printers can create labels and signs from ½” up to 9″.

— Solar Builder magazine

Yaskawa-Solectria debuts commercial Rapid Shutdown Combiner for three-phase string inverters

Yaskawa – Solectria Solar, just introduced its Commercial Rapid Shutdown Combiner for three-phase string inverters. This Commercial Rapid Shutdown Combiner offers a complete solution to NEC 2014 & 2017, Article 690.12, requiring commercial rooftop PV installations to de-energize DC conductors outside the PV array boundary.

Yaskawa Solectria Solar combiner rapid shutdownThe Commercial Rapid Shutdown Combiner’s design integrates seamlessly with Yaskawa – Solectria Solar’s PVI 14-60 TL three-phase, transformerless inverters. It allows operation of 1 or 2 MPPT zone configurations with up to 5 strings per MPPT zone.

If the Rapid Shutdown Combiner is enabled, the array automatically shuts down the system upon loss of AC power to the site, without an additional power supply, disconnect or activation switch. Together, Yaskawa – Solectria Solar’s PVI 14-60TL three-phase, transformerless inverters and Commercial Rapid Shutdown Combiner provide a fully-integrated solution and the simplest way to achieve compliance with NEC 2014 & 2017, Article 690.12.

RELATED: How to select the right combiner box for your next solar project 

“With 35 states now following NEC 2014, and the rapid adoption of NEC 2017, our 3-phase Commercial Rapid Shutdown Combiner is the go-to solution for commercial rooftop installations. Yaskawa – Solectria Solar provides a bankable and cost competitive product, allowing customers to use one solution provider for all their requirements,” said Miles Russell, Director of Product Management for Yaskawa – Solectria Solar.

— Solar Builder magazine

SPI Preview: Fronius showcases shutdown, storage, smart meters, software and a paddleboard

While attending Solar Power International in Las Vegas this year, you will notice the large presence Fronius has on the trade show floor (booth 1521), promoting a slew of products under its mantra of “24 hours of sun.” Here is a sneak peek of what you’ll find. (Oh, and you’ll also have a chance to win several prizes, including a grand prize of an inflatable Fronius paddleboard.)

Fronius smart inverter

Fronius Primo Hybrid and Tesla Powerwall

Fronius Rapid Shutdown solution

The Fronius Rapid Shutdown Boxes provide an NEC 2014 code (690.12) compliant solution while enhancing rooftop and firefighter safety. Directly connected to the inverter through the same conduit as the DC homeruns, the Fronius solution minimizes the number of components needed providing ease of installation. See both versions of the Fronius Rapid Shutdown Box and how it can be mounted behind the array.

Fronius Primo Hybrid and Tesla Powerwall

The Fronius Primo Hybrid is the seamless storage solution for residential solar systems. It is suitable for both new solar installations and existing systems. The Fronius Primo Hybrid inverter, partnered with the Tesla Powerwall creates the most streamlined storage system available. The Fronius Primo Hybrid can operate the PV array and the Tesla Powerwall at the same time, reducing system costs. In existing systems, the Fronius Primo Hybrid can simply be added (AC coupled) or replace the existing inverter (DC coupled).

Fronius Smart Meter

Are you facing feed-in limitations for a solar system? Or would you like to monitor a house’s energy consumption? Fronius has you covered – Introducing the Fronius Smart Meter, a bidirectional energy meter. Thanks to high accuracy and fast communication via Modbus RTU, the meter is suitable for various applications, such as dynamic feed-in management (e.g. zero export) or self-supply systems. Together with Fronius Solar.web, the Fronius Smart Meter offers a detailed overview of energy consumption within a home or commercial building.

Fronius SnapINverter line

The Fronius SnapINverters are a string inverter family from 1.5 to 24.0 kW with a simple hinged mounting system, allowing for easy installation within 15 minutes or less. Simply commission the system with the company’s smartphone app and connect it to Fronius Solar.web via integrated Wi-Fi. The great design flexibility and rich feature set with integrated DC disconnect, AFCI, Wi-Fi, SunSpec Modbus, Advanced Grid Features and optional Revenue Grade Meter make SnapINverters a great choice for any residential or commercial installation.

Remote inverter software update and Bay4 Energy

Fronius will introduce its all-new Fronius Solar.web online monitoring platform, including the new remote inverter software update feature. Also, learn more about its collaboration with Bay4 Energy to provide best-in-class commissioning support, O&M and asset performance management services.

“We are looking forward to presenting the latest Fronius solutions to our customers and to further supporting the US solar market with innovations that bring us closer to 24 hours of sun,” says Tristan Kreager, Director of Solar Energy at Fronius USA.

— Solar Builder magazine