Selecting an Inverter for Rapid Shutdown with TS4-F

If you want to achieve module-level rapid shutdown and have chosen to use the TS4-F for your PV system, one of your first steps is to ensure the system will be installed with an RSS transmitter. This is required for the system to function properly. The RSS transmitter sends a "keep alive" signal to the TS4-F/TS4-A-F units, and when it is turned off, this "keep alive" signal disappears, and the system goes into rapid shutdown mode. 

RSS transmitters can be bought and installed as an external standalone product through Tigo, or alternatively, some inverter manufacturers integrate compatible RSS transmitters into their inverters for reduced installation time.

Below is the list of inverters with compatible integrated RSS transmitters. Contact the respective manufacturer for more information.

SMA

STP62 US-41
STP50 US-41
STP33 US-41
SB 7.7 SP-US-41
SB 7.7 TP-US-41
SB 7.0 SP-US-41
SB 7.0 TP-US-41
SB 6.0 SP-US-41
SB 6.0 TP-US-41
SB 5.0 SP-US-41
SB 5.0 TP-US-41
SB 3.8 SP-US-41
SB 3.8 TP-US-41
SB 3.0 SP-US-41
SB 3.0 TP-US-41

Fronius

Symo Advanced 24.0-3 (24kW)
Symo Advanced 20.0-3 (20kW)
Symo Advanced 15.0-3 (15kW)
Symo Advanced 12.0-3 (12kW)
Symo Advanced 10.0-3 (10kW)

Chint Power

CPS SCA60KTL-DO/US-480
CPS SCA50KTL-DO/US-480

Solectria

PVI 60TL (60kW)
PVI 50TL (50kW)

*Note that this list may not be up to date.  Check with your inverter manufacturer for the lastest information.

A complete list of inverters compatible with Tigo TS4-F can be found on the UL website.  This document is in sections, the TS4-F section is last.  Some of these have built-in transmitters, some do not.  This is a list of equipment that has been tested together and certified by UL (Underwriter's Laboratories), the most recognized and respected testing organization in the United States.  You will need to register to access the UL link above, but it is free.

Some inverters, such as the Delta M80U, have an integrated power supply. In those cases, that PS can be used to power the Tigo RSS Transmitter rather than using an external PS.

If you are designing a system with the TS4-M/S/O/L, please follow this link to find relevant design documentation: TS4-M-S-O-L-Design-Essentials.

If you have any further questions please feel free to contact training@tigoenergy.com.