Where can I find the GTI so that I can allow my TRACE SW to sell power back to the utility?
Setting a TRACE SW inverter to be able to sell power back to the grid
The GTI is an accessory for the Trace SW inverters that provide the unit with anti-islanding capability, and is designed for use with Trace SW models with 4.2 or newer software (DOM 2001). The GTI is required for the inverter to be able to be compliant with the NEC code of North America. The following link is a distributor that still offers this product. :
TRACE GTI Manual: