1
1.0 INTRODUCTION
©2000 Xantrex/Trace Engineering
The Trace Sun Tie (ST) solar power conversion center is designed to convert a home or
business into a green power generating station. The ST unit converts solar electric (PV) power into
utility grade electricity which can be used by the home, or sold to the power company. Installing an
ST unit is as simple as mounting it to the wall and connecting a DC source (PV array), and the AC
output to the utility.
Standard Features
All-in-one Design
All necessary DC input and AC output connections, disconnects and circuit breakers are housed
within the STs easily installed, compact enclosure. A built-in LCD panel provides easy-to-read
system status and daily cumulative energy production information.
Uses Most Types of PV Technology
The ST is designed to take advantage of most types of solar electric technologies. The inverter
allows up to 120 VDC open circuit PV modules to be used so both crystalline and thin film PV
modules can be used.
Maximum Power Point Tracking
The inverter performs a power sweep every minute adjusting array voltage and current,
maximizing PV power generation. Maximum Power Point Tracking (MPPT) ensures the system
produces as much AC power as possible under any light condition.
High Efficiency and Long Life
The high frequency, solid-state design of the ST inverter is extremely efficient. When array
output is over 500 watts, the inversion process is over 90% efficient (with a peak efficiency of 94%).
The ST inverter has a design life of over twenty years.
Expandable
ST inverters may be connected in a parallel configuration for increasing net metering capacity.
The modular expandability of the ST Series allows for system growth.
UL Listed
The ST has complete on-board islanding protection and meets safety operating standards and
code requirements world wide. In North America, it is UL listed (UL 1741-First Edition) and cUL listed
to CSA C22.2 No. 107.1-95. NEC 690 building code requirements for PV may be met with the
optional ground fault protection (PVGFP).
Options
These features are included on some models:
PV array combiner board with six 20 amp max. protected inputs
PV array Ground Fault Protection PVGFP
