Complying with NEC 690.12 Rapid Shutdown

Tigo is pleased to announce that its TS4-S, TS4-O, TS4-L products, as well as JES integrated junction boxes, are part of a solution to NEC 2014 and 2017 690.12 rapid shutdown requirements for all US residential and commercial systems, so long as the following requirements are met:

NEC 2014

• All modules are equipped with either one or a combination of the following TS4 units:
• TS4-S/TS4-R-S
• TS4-O/TS4-R-O (UHD-Core or non-UHD-Core)
• TS4-L/TS4-R-L (UHD-Core or non-UHD-Core)

or

• All modules are 1st generation embedded Smart Modules (JES/HBF products)
• Modules are installed with a Cloud Connect or Cloud Connect Advanced and TAP(s)
• The Cloud Connect(s) is installed on same AC main service as a rapid-shutdown ready inverter (For non-RSS ready inverters, DC disconnect must also be switched off to enter Rapid Shutdown)

A PV system meeting the above criteria will initiate rapid shutdown that complies with NEC 2014 requirements when its AC main breaker is turned off, causing the outputs of all module leads to drop to 0A and 0V within 30 seconds. Thus, array voltage remains below 30V and 240V AC inside the boundaries as defined by code.

These solutions were tested and certified by Intertek on October 2014.

NEC 2017

Per NEC 2017 690.12, the requirements below will be mandated as of January 2019. Until that date, either the solution above for NEC 2014 or the solution below for NEC 2017 are acceptable.

The requirements mandated as of January 2019:

• All modules are equipped with either TS4-S/TS4-R-S (UHD-Core) OR a combination of TS4-O/TS4-R-O (UHD-Core) and TS4-L (UHD-Core)

• Modules are installed with a Cloud Connect or Cloud Connect Advanced and TAP(s)
• The Cloud Connect(s) is installed on same AC main service as a rapid-shutdown ready inverter (For non-RSS ready inverters, must make sure upon AC loss inverter drops voltage between (-) and (+) to GND within 30 seconds)
• Installed inverter corresponds to installed TS4 covers as shown below
  

  TS4 Cover Type	TS4-S/TS4-R-S	TS4-O/TS4-R-O or TS4-L
  Compliant Inverters	SMA Fronius Solis ABB	SMA Ingeteam Yaskawa Solectria Solar ABB Delta Sungrow Fronius Ginlong Huawei Kaco

Other inverters may receive a compliance certificate as well with our system. Current UL certified combinations can be found here, http://productspec.ul.com/document.php?id=QIJS.E469960.

A PV system meeting the above criteria will initiate rapid shutdown that complies with NEC 2017 requirements when its AC main breaker is turned off, causing the outputs of all module leads to drop to 0A and 0V within 30 seconds. Thus, within the array (up to 1 ft or 305 mm from it) voltage drops below 80V, and outside the array voltage drops below 30V, within 30 seconds, as defined by code.

Please consult the Tigo Energy Installation and Safety Manual to ensure that the system is set up and configured properly.

Click here to view our rapid shutdown certificates.

For the full details of rapid shutdown and other safety functions with Tigo PV-Safe, click here.