Xantrex SunTie XR User Guide

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Installation & Operator’s Manual

STXR1000, STXR1500, STXR2000 and STXR2500

Sun Tie XR Inverter

STXR1000, STXR1500, STXR2000 and STXR2500

Table of Contents

Section Description Page

1.0 INTRODUCTION .....................................................................................1

Standard Features ........................................................................... 1

2.0 INSTALLATION ....................................................................................... 2

Pre-Installation ................................................................................ 2

Tools Required .......................................................................... 2

Hardware/Materials Required ..................................................2

Location ..................................................................................... 2

AC Connections ........................................................................2

DC Connections ........................................................................3

STXR1500 and STXR2500 ..................................................3

STXR1000 and STXR2000 ..................................................4

Grounding ................................................................................. 5

AC Grounding .....................................................................5

DC Grounding .....................................................................5

PV Arrays ................................................................................... 5

AC Circuit Breakers .................................................................. 6

Wire Routing ............................................................................. 6

Mounting ..........................................................................................7

Wiring ........................................................................................... 12

DC Wiring ................................................................................ 12

STXR1500 and STXR2500 DC Wiring.............................. 12

PV Array Conduit Wiring Run .......................................... 12

STXR 1500 and STXR2500 DC Wiring............................. 14

PV Array Conduit/Wire Run .............................................14

AC Wiring ................................................................................ 15

Installing the Optional Remote Monitor ................................17

Wiring to the Sun Tie........................................................17

Lightning Protection ............................................................... 18

3.0 OPERATION ......................................................................................... 20

Start-up Procedure ........................................................................ 20

Required Equipment ............................................................... 20

AC Utility Voltage Check ........................................................ 20

Solar Array DC Voltage Check ............................................... 21

Operational Test ...................................................................... 22

4.0 TROUBLESHOOTING ..........................................................................26

5.0 SPECIFICATIONS .................................................................................29

6.0 SERVICE INFORMATION ..................................................................... 30

7.0 WARRANTY .......................................................................................... 31

Disclaimer of Liability

Since the use of this manual and the conditions or methods of installation, operation, use and maintenance of the unit are beyond the control of Xantrex Technology Inc., the company does not assume responsibility and expressly disclaims liability for loss, damage, or expense arising out of or any way connected with such installation, operation, use, or maintenance.

IMPORTANT SAFETY INSTRUCTIONS

This manual contains important safety instructions that should be followed during the installation

and maintenance of this product.

To reduce the risk of electrical shock, and to ensure the safe installation and operation of this product, the following safety symbols have been placed throughout this manual to indicate dangerous conditions and important safety instructions.

WARNING - A dangerous voltage or condition exists in this area.

Use extreme caution when performing these tasks.

AVERTISSEMENT - Une tension ou condition dangereuse existe dans cette zone.

Faire preuve d’extrême prudence lors de la réalisation de ces tâches.

CAUTION - This procedure is critical to the safe installation or operation of the unit. Follow these

instructions closely.

ATTENTION - Cette procédure est essentielle à l’installation ou l’utilisation

de l’unité en toute sécurité. Suivre ces instructions de près.

NOTE - This statement is important. Follow instructions closely.

NOTE - Cette déclaration est importante. Suivre les instructions de près.

• All electrical work must be done in accordance with local and national electrical codes.

• Before installing or using this device, read all instructions and cautionary markings located in (or on) the manual, the STXR and the PV array.

• Do not expose this unit to rain, snow or liquids of any type without the rain/weather shield hood installed (optional on some models).

• To reduce the chance of short-circuits when installing or working with the inverter or the PV array, use insulated tools.

• Remove all jewelry such as rings, bracelets, necklaces, etc., prior to installing this system. This will greatly reduce the chance of accidental exposure to live circuits.

• The ST unit contains more than one live circuit (PV array and AC line). Power may be present at more than one source even when the circuit breakers are off.

• This product contains no user serviceable parts. Return the unit to a Xantrex Authorized Service Center for maintenance.

• Wiring to the utility should only be done after receiving prior approval from the utility company and performed only by a qualified electrician.

• Completely cover the surface of all PV arrays with an opaque (dark) material BEFORE wiring them. PV arrays produce electrical energy when exposed to light and could create a hazardous condition.

SAVE THESE INSTRUCTIONS

III

SOLAR

HARVESTED AC

POWER TO GRID

PV ARRAY

SUN TIE XR

AC UTILITY

METER

OFF

DC INPUT VOLTAGE

AC OUTPUT

VOLTAGE

OFF

Sun Tie

MAIN UTILITY

ELECTRICAL PANEL

975-F00-008SB

NOTE: This is a one line drawing intended as a system overview only. System grounding and other electrical details are not included.

1.0 INTRODUCTION

The Sun Tie solar power conversion center is designed to convert a home or business into a “green” power generating station. The Sun Tie unit converts solar electric (PV) power into utilitygrade electricity which can be used by the home or sold to the power company. Installing a Sun Tie 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 Sun Tie’s 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 Sun Tie 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.

Sun Sweep™–Maximum Power Point Tracking (MMPT)

Sun SweepTM is Xantrex’s proprietary Maximum Power Point Tracking technology that allows the Sun Tie XR to harvest the maximum amount of energy from your solar array. No matter what PV system you choose, single crystalline, polycrystalline or thin film, SunSweepTM learns your array’s specific characteristics, maximizing its output, all day, all season, year after year.

High Efficiency and Long Life

The high frequency, solid-state design of the Sun Tie inverter is extremely efficient. Above 500 watts, the inversion process is 90% efficient (or greater) with a peak efficiency of 94%. The Sun Tie inverter has a design life of over twenty years.

Expandable

Sun Tie XR inverters may be connected in a parallel configuration for increasing net metering capacity. The modular expandability of the Sun Tie Series allows for system growth.

UL Listed

The Sun Tie XR has complete on-board islanding protection and meets U.S. and Canadian safety operating standards and code requirements. In North America, it is UL Listed (UL 1741-1999) 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 maximum protected inputs

• PV array Ground Fault Protection PVGFP

Accessories

• STRM–Sun Tie XR Remote Monitor

• STRS–Sun Tie XR Rain Shield

2.0 INSTALLATION

Pre-Installation

Before installing the Sun Tie XR, read all instructions and cautionary markings located in this

manual, on the PV array and on the main service panel.

NOTE: The Sun Tie weighs approximately 35 pounds (depending upon configuration and model). Always use proper lifting techniques during installation to prevent personal injury.

Tools required

Phillips screw drivers level slotted screw drivers wire strippers open-end wrenches torque wrench socket wrench and fittings electrical tape multimeter (true rms) pencil frequency counter (optional) utility knife

Hardware/Materials required

wood screws and washers (supplied) conduit and appropriate fittings anchors for screws (material dependent)

Location

The Sun Tie XR unit can be mounted outdoors with the optional Rain Shield (STRS).

AC Connections

The inverter’s AC output breakers accept wire sizes from #6–14 AWG. Refer to the table below

for minimum recommended wire size.

Inverter

Model

STXR1000

STXR1500

STXR2000

STXR2500

AC Amps

Output per

leg

4.2 5.2 14 AWG 14 AWG 12 AWG

6.3 7.8 14 AWG 12 AWG 10 AWG

8.3 10.4 14 AWG 12 AWG 10 AWG

10.4 13 14 AWG 12 AWG 8 AWG

NEC Amp

(Amps x 125%)

Recommended Minimum AC Wire Sizes

Minimum Wire Size for Specified Distance

0–50 Ft

One Way

50–100 Ft

One Way

Table 2-1

100–200 Ft

One Way

975-000-001

NOTE: These are the minimum recommended wire sizes in conduit. Installing a large number of wires in conduit or enclosed locations may require larger wire sizes. Consult your local/national electrical code for more information.

NOTE: The six-circuit combiner board is rated for 100 amps of maximum real current. Although the 20 amp fuses will theoretically allow 120 amps to be applied, always design for a maximum of 100 amps maximum current. With appropriate fuse deratings, per NEC code, the maximum allowed current is 16 amps for any of the six circuits.

2.0 INSTALLATION

Pre-Installation (continued)

DC Connections STXR1500 and STXR2500

DC connections are made on the combiner board for models STXR1500 and STXR2500. The combiner board accepts wire sizes from #6–14 AWG. Refer to the table below for minimum recommended wire sizes.

DC Amps

1.0 1 .6 14 AWG 14 AWG 14 AWG

3.0 4.7 14 AWG 12 AWG 10 AWG

5.0 7 .8 12 AWG 10 AWG 6 AWG

7.0 10.9 12 AWG 8 AWG 6 AWG

9.0 14.0 10 AWG 8 AWG Not Recommended

11.0 17.2 10 AWG 6 AWG Not Recommended

NEC Amp

(Amps x 156%)

Minimum Wire Size for Specified Distance

0–25 Ft

One Way

25–50 Ft

One Way

50–100 Ft

One Way

975-000-002

Table 2-2

Recommended Minimum DC Wire Sizes

NOTE: These are the minimum recommended wire sizes. Installing a large number of wires in conduit or enclosed locations may require larger wire sizes. Consult your local/national electrical code for more information.

*NOTE: For installations requiring a two-wire run (positive and negative), the PV array wires can bypass the individual, fused combiner board terminals and connect directly to the input terminals (via an externally mounted DC fused combiner box) by using the positive and egative bypass terminals on the top of the combiner board. Refer to Figure 2-1 and Table 2-3 for connections and wire sizes.

*Positive (+) PV Array

Bypass Terminal

*Negative (-) PV Array

Bypass Terminal

PV array wiring

(note polarity)

DC conduit wiring

(from solar arrays)

–

Figure 2-1

Combiner Board Indicating DC PV Array Wire Connection Points

NOTE: The National Electrical Code (NEC) places restrictions on minimum DC wire bending radius. A #6 AWG wire is the largest that may be used on the STXR1500 and STXR2500 inverters when connecting to the individual fused circuits of the combiner board.

2.0 INSTALLATION

Pre-Installation (continued)

DC Connections STXR1000 and STXR2000

DC connections are made at the 100 amp DC circuit breaker and the DC negative terminal block

for models STXR1000 and STXR2000. Refer to the table below for minimum recommended wire sizes.

DC Amps

(from PV array)

10 15.6 10 AWG 6 AWG 4 AWG

15 23.4 8 AWG 4 AWG *2 AWG

20 31.2 6 AWG 4 AWG *1 AWG

30 46.8 4 AWG *2 AWG Not Recommended

40 62.4 4 AWG *1 AWG Not Recommended

60 93.6 *2 AWG Not Recommended Not Recommended

NEC Amp

(Amps x 156%)

Minimum Wire Size for Specified Distance

0–25 Ft

One Way

25–50 Ft One Way

50–100 Ft

One Way

975-000-004

Table 2-3

Recommended Minimum DC Wire Sizes

*NOTE: The National Electrical Code (NEC) places restrictions on minimum DC wire bending radius. If the enclosure’s side is used for routing the wires to the DC terminals, then the wires must be bent to make the appropriate connections. A #3 AWG wire is the largest that may be used on the STXR1000 and STXR2000 inverters if the side panel is used. Side knockouts are NOT provided on the unit.

PV array Negative wiring

PV array Positive wiring

Figure 2-2

DC PV Array Wire Connection Points

(with no combiner board)

2.0 INSTALLATION

Pre-Installation (continued)

Grounding

AC Grounding

The Sun Tie should be connected to a grounded, permanent wiring system.

DC Grounding

The negative PV conductor should be bonded to the grounding system at only one point in the system. The size for the conductor is usually based on the size of the largest conductor in the DC system. Negative/ground bonding is accomplished by factory wired PVGFP breakers (when this option is installed) or a factory installed grounding block (when PVGFP is not installed).

PV Arrays

The Sun Tie is optimized to work with 4-each, 12 volt nominal crystalline PV modules in series (48

VDC nominal), or various combinations of amorphous, thin film PV modules. Ensure the PV array used in the system operates within the MPPT operational window.

The solar array connected to the Sun Tie Series inverter should have a minimum of 50 volts DC

open-circuit in full sunlight conditions. Crystalline solar arrays configured for 48 volts DC nominal will have a open-circuit voltage in the area of 84 volts DC in full sunlight. The maximum peak power tracking (MPPT) software controls the output of the solar modules, under loaded conditions, in the 42-85 volts DC range (full inverter output power occurs between 52–85 VDC). Other array voltage will either not operate the inverter, may cause damage or will not allow maximum harvest of the sun’s energy.

WARNING: WHENEVER A PV ARRAY IS EXPOSED TO SUNLIGHT, A SHOCK HAZARD EXISTS AT THE OUTPUT CABLES OR EXPOSED TERMINALS. TO REDUCE THE RISK OF SHOCK DURING INSTALLATION, COVER THE ARRAY WITH AN OPAQUE (DARK) MATERIAL BEFORE MAKING ANY CONNECTIONS.

STXR1000 and STXR2000 Models

STXR1500 and STXR2500 Models

Ground Bar Location

(connect to solid earth ground)

Figure 2-3

Ground Bar Location

2.0 INSTALLATION

AC Circuit Breakers

The main service panel must dedicate a 15 amp minimum, double pole breaker (120/240 volts AC)

to operate the Sun Tie XR.

Wire Routing

Determine all wire routes both to and from the Sun Tie. Possible routing considerations include:

• AC input wiring from the main service panel to the Sun Tie

• DC input wiring from the PV array to the Sun Tie

• DC ground from the PV array to an external ground rod

• All wiring and installation methods should conform to applicable electrical and building codes.

• Pre-plan the wire and conduit runs. The DC terminal blocks accept up to a #6 AWG wire (STXR1500 and STXR2500) and #2 AWG* wire (STXR1000 and STXR2000); the AC circuit disconnects accept cable sizes up to #6 AWG.

• For maximum safety, run AC and DC wires/cables in (separate) conduits.

*NOTE: #2 AWG wire can only be used if the bottom knockouts are used. If punching side walls for wire routing, the largest wire for acceptable wire bend radius is #3 AWG maximum.

WARNING: CHECK FOR EXISTING ELECTRICAL OR PLUMBING PRIOR TO DRILLING HOLES IN THE WALLS!

+ 28 hidden pages

Xantrex SunTie XR User Guide

Specifications and Main Features

Frequently Asked Questions

User Manual