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Southwest Photovoltaic (PV) Systems, Inc.
212 East Main, Tomball, Texas 77375 • Ph: 281.351.0031 • Fax: 281.351.8356

Connecting The Sun To Your Utility Meter
Trace Engineering’s new Sun Tie (ST) solar electric inverters are designed, built and priced to make the benefits of site-generated PV power easy for anyone to attain. The Sun Tie operates interactively with the utility, without the use of batteries. Made specifically for new, small-scale, independent power producers, the ST is a perfect choice for anyone interested in participating in the emerging Green Power market. The ST is available in four models with output capacity of 1.0, 1.5, 2.0 and 2.5 kVA.

Distributed generation, using the power of the sun, is a win - win choice for the environment, utility companies and consumers alike. With this form of electrical distribution, solar PV power is generated and inverted at the location where it’s used. Solar electricity helps reduce the need for new large-scale—and often environmentally harmful—generating stations and distribution lines.

Consumers can have lower electricity bills because any PV power they generate is either used in their home or business or, when there is excess, sold to the utility company. “Net Metering” is one way electricity is exchanged between the power grid and solar generators. Net Metering programs are available from many utility companies, contact your local electricity provider for details.

All-in-One Design

All NEC (U.S. National Electrical Code) required DC input and AC output connections, disconnects and circuit breakers are housed within the Sun Tie’s compact case. A built in LCD panel provides easy-to-read system status and daily cumulative power production information.

Works With Any Type of PV Technology

The ST is designed to optimize the output from all types of solar electric technologies. The open circuit voltage window of the Sun Tie ranges up to 125 VDC so both conventional Crystalline and newer Thin Film PV modules can be used.

Maximum Power Point Tracking

The Sun Tie uses sophisticated software to track and adjust the output of the PV array. Our Maximum Power Point Tracking (MPPT) software, which samples once a minute, ensures complete harvest of the sun’s energy all day long.

Expandable

Multiple ST inverters can be connected to a utility grid so that additional generating capacity may be added in a fully modular manner.

High Efficiency, Long Life Design

The high frequency, solid state design of the ST inverter is extremely efficient. The inverter efficiency is over 90%, with peak efficiencies of 94%. Built and designed in the U.S.A. by Trace Engineering, makers of the worlds most reliable inverters, the Sun Tie is sure to provide many years of trouble free service and carries a two year warranty.

Standard Features

Sun Tie—Utility interactive inverter, 240 VAC 60 Hz output. Includes factory installed DC and AC input/output breakers, combination DC and AC lightning arrestor.

Options

STRS—Protective rain shield, required for out door installation of ST Series inverters

Certifications

UL Listed—The Sun Tie is UL Listed to UL 1741 and cUL Listed to CSA 22.2. The ST is designed to comply with IEEE 929.

Note: ST1000 and ST2000 models do not include PV ground fault interrupters and PV combiner boards. Trace offers a PV ground fault interrupter (PVGFP) which requires an enclosure (not included) and a UL Listed 10 circuit combiner box (TCB10). Both of these items can be ordered separately.

Specifications

Model ST1000 ST1500 ST2000 ST2500
AC Voltage - Nominal 240 VAC
Maximum Power point tracking voltage range 42 - 85 VDC
Minimum Input DC voltage (for full rated AC output) 52 VDC (typically, four nominal 12 VDC PV modules, in series)
Minimum Wake-up DC Input Voltage 50 VDC
Absolute Maximum PV Open Circuit Voltage 125 VDC
AC Voltage - Min/Max 211 - 254 VAC
AC output characteristics Current source
Nominal Frequency - 60 Hz
Frequency Window - Min/Max 59.5 - 60.5 Hz. Default
Continuous AC Output @ 25° 1.0 kVA 1.5 kVA 2.0 kVa 2.5 kVa
Efficiency Peak 92% 94%
AC Output Waveform Sine wave, high frequency PWM controlled
Total Harmonic Distortion Less than 5% at rated power per IEEE 929 and UL 1741
AC Disconnect Double pole 15 Amp 240 VAC branch circuited rated breaker.
DC Disconnect Single Pole 100 amp DC rated circuit breaker.
Islanding Protection Over/under AC Voltage and frequency detection plus active islanding detection - Meets IEEE 929 and UL 1741 requirements.
User Display Backlit alphanumeric LCD displays - AC amps, AC voltsrms, DC volts, AC frequency, output power (W) and (Wh) produced.
Specified Temperature Range 32F° - 113 F° (0 C° - 45 C°)
Enclosure Type Outdoor, rainproof, powder coated aluminum enclosure, fully screened.
Dimensions - Inverter only 13.25" W x 33.25" H x 5.3" D (33.8cm W x 83.1cm H x 13.2 cm D)
Dimensions - Shipping 15.75" W x 37.75" H x 9.5" D (39.4cm W x 94.4cm H x 23.8cm D)
Weight - Inverter only 35 lbs. (16kg)
Weight - Shipping 40 lbs. (18kg)
Mounting Vertical wall mount only.
Listings UL listed to UL 1741, 1st edition and cUL listed to CSA 22.2 #107.1-95
Specifications subject to change without notice.


Standard Features and Options
Model ST1000 ST1500 ST2000 ST2500
PV Ground Fault Protection System -- Standard -- Standard
PV combiner board with 6 fused inputs 20 Amp maximum per input. -- Standard -- Standard
Surge arrestor - Combined AC/DC protection Standard Standard Standard Standard
Rain Shield (STRS) - Protective rain shield. Required for outdoor installation. Optional Optional Optional Optional

 

   
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