SMA Sunny Boy 1100U Installation Manual
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SMA Sunny Boy 1100U Installation Manual

SMA Sunny Boy 1100U Installation Manual

Photovoltaic, grid-tied string inverter
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Sunny Boy 1100U
Photovoltaic, Grid-Tied
String Inverter
Installation Guide

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Summary of Contents for SMA Sunny Boy 1100U

  • Page 1 Sunny Boy 1100U Photovoltaic, Grid-Tied String Inverter Installation Guide...

  • Page 3: Revision History

    Specifications are subject to change without notice. Every attempt has been made to make this document complete, accurate, and up-to-date. Readers are cautioned, however, that SMA America reserves the right to make changes without notice and shall not be responsible for any damages, including indirect, incidental or...

  • Page 4: Safety And Hazard Symbols

    Installation Guide IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important instructions for the Sunny Boy 1100U that must be followed during installation and maintenance of the inverter. The Sunny Boy is designed and tested according to international safety requirements, but as with all electrical and electronic equipment, certain precautions must be observed when installing and/or operating the Sunny Boy.

  • Page 5: Cautions And Warnings

    SMA equipment and/or other equipment connected to the SMA equipment. Warnings and Cautions may also be accompanied by one or more of the safety and hazard symbols described above to indicate the type of hazard described therein.

  • Page 6: Other Symbols

    Sunny Boy shipping container. For warranty coverage, or if you have questions about the Sunny Boy warranty, contact SMA America at the address, telephone number, or Web site listed on page i (to send E-mail, see the Contact section of the SMA America Web site).

  • Page 7: Table Of Contents

    Sunny Boy 1100U Internal Components ....4-2 Opening the Sunny Boy 1100U ....4-2 Locating Internal Components .
  • Page 8 SMA America SB1100U-11:SE1604...

  • Page 9: Introduction

    Product Overview The SMA Sunny Boy 1100U string inverter is designed for use in grid-tied PV generating plants. It accepts DC voltage inputs from PV arrays of up to 400 V DC. A grid-feeding inverter takes the DC output of the PV array, converts it to AC, adjusts the output voltage to match the local utility-grid voltage, and feeds the AC output to both the house wiring and the utility grid.

  • Page 10: Installation Overview

    This section includes guidelines to help you select the best mounting location, cautions and warnings that you should follow to avoid injury and/or equipment damage, and step-by-step instructions for mounting a Sunny Boy 1100U inverter. Section 4: Wiring and Connecting the Sunny Boy...

  • Page 11: Unpacking And Inspection

    SMA dealer and to the shipping company that delivered the Sunny Boy. If it becomes necessary to return the Sunny Boy, use the original packaging in which the Sunny Boy was delivered.
  • Page 12 Unpacking and Inspection SMA America SB1100U-11:SE1604...

  • Page 13: Mounting The Sunny Boy

    Consider the following guidelines, cautions, and warnings when choosing a mounting location for a Sunny Boy inverter: • The Sunny Boy 1100U should be installed in a location where it is not exposed to direct sunlight, since the higher temperature within the unit caused by the sun can result in reduced output from the PV system.
  • Page 14 Mounting the Sunny Boy Choosing a Mounting Location CAUTION: The Sunny Boy 1100U weighs 21 kg (47 lb.). Ensure that the surface on which you mount the Sunny Boy is strong enough to hold the weight. Do not mount the Sunny Boy on plasterboard (sheet-rock) or thin wood panelling.

  • Page 15: Dimensions And Recommended Clearances

    Dimensions and Recommended Clearances Dimensions and Recommended Clearances The outer dimensions of the Sunny Boy 1100U are shown in Figure 3-2. The Sunny Boy must be mounted so that there is at least eight inches of clearance above the heat sink...
  • Page 16 Mounting the Sunny Boy Dimensions and Recommended Clearances Wall-Mounting Bracket Figure 3-3 Dimensions of the wall-mounting bracket SMA America SB1100U-11:SE1604...

  • Page 17: Mounting Procedure

    Mounting Procedure Mounting Procedure The Sunny Boy 1100U is shipped with a T-shaped wall-mounting bracket that is suitable for use with most walls (see Figure 3-4). The horizontal part of the T bracket has two holes spaced for 16-inch centers for mounting on wooden wall studs, or it can be mounted on concrete or stone walls.
  • Page 18 9. Insert an M6x10 bolt through the hole in the mounting strap and into the threaded hole in the bottom end of the wall-mounting bracket (see #3 in Figure 3-4). 10.Tighten the bolt fully (do not overtighten). 11.Verify that the Sunny Boy 1100U is firmly mounted in place. SMA America SB1100U-11:SE1604...

  • Page 19: Wiring And Connecting The Sunny Boy

    This section provides step-by-step procedures and other information required for wiring the Sunny Boy 1100U to the PV array, the household circuits, and the utility grid. To accomplish the installation in the safest and most efficient manner, complete the steps in the order that they appear.

  • Page 20: Sunny Boy 1100U Internal Components

    Locating Internal Components Figure 4-1shows the internal components of the Sunny Boy 1100U. Refer to this illustration whenever you need to locate a component to complete a step of the installation procedure.
  • Page 21 PV array) PV array) Figure 4-1 Sunny Boy 1100U Internal Component Locator The DC input from the PV array (via the DC disconnect enclosure) and the output to the AC utility grid connect to the inverter inside the Sunny Boy’s case. These internal AC and DC wiring terminals (see Figure 4-1) accept a maximum wire size of #6 AWG.
  • Page 22 Communication Cable 1/2” AC Knockout Gland Figure 4-2 Bottom View of the Sunny Boy 1100U Showing 1/2” Wiring Knockouts CAUTION: All knockouts in the Sunny Boy chassis are sized for -inch rigid conduit (EMT). DO NOT enlarge any of these holes, as this is a violation of UL requirements and voids the SMA warranty.

  • Page 23: Wiring The Ac Output

    The diagram in Figure 4-3 shows the potential losses in AC wires with respect to the cross-sectional area of the cable and the length of the cable. Use this table to determine the best wire size to use for your particular installation. SB1100U-11:SE1604 SMA America...

  • Page 24: Connecting The Ac Wires

    Figure 4-3 Energy Losses in Various Wire Sizes and Wire Lengths The Sunny Boy 1100U is designed to feed 213 V AC to 262 V AC to the utility grid at frequencies from 59.3 Hz to 60.5 Hz. Table 4-1 lists the voltage and frequency limits for the AC connection.
  • Page 25 8. Connect the L2 (AC line 2) wire to the terminal labeled L2 in the Sunny Boy. 9. Fasten the wires while applying a torque of 35 in-lb. 10. Verify that all connections are correctly wired and properly torqued. SB1100U-11:SE1604 SMA America...
  • Page 26 Wiring and Connecting the Sunny Boy Wiring the AC Output Figure 4-4 AC Connection Terminals SMA America SB1100U-11:SE1604...

  • Page 27: Wiring The Dc Input

    DC wiring connections to the Sunny Boy. Voltage drop and other considerations may dictate that larger size wires be used. Note: Use the online string-sizing calculator at < www.sma- america.com > to determine the correct string configuration (see Figure 4-6). To navigate to the string-sizing calculator, click “String Sizing”...
  • Page 28 Wiring and Connecting the Sunny Boy Wiring the DC Input Figure 4-6 Online String-Configuration Calculator at < www.sma-america.com > 4-10 SMA America SB1100U-11:SE1604...

  • Page 29: Connecting The Dc Wires

    If it becomes necessary to disconnect the Sunny Boy for repairs or maintenance, perform the steps above in the reverse order begining with turning all disconnects and breakers OFF and waiting 5 minutes for the Sunny Boy to discharge. SB1100U-11:SE1604 SMA America 4-11...
  • Page 30 DC-input-voltage range correctly before connecting the DC- input wires from the PV array to the Sunny Boy (see "Use the online string-sizing calculator at < www.sma-america.com > to determine the correct string configuration (see Figure 4- 6). To navigate to the string-sizing calculator, click “String Sizing”...
  • Page 31 8. Connect the positive and negative DC wires to the appropriate terminals in the DC disconnect enclosure. 9. Fasten the wires while applying a torque of 35 in-lb. 10. Verify that all connections are correctly wired and properly torqued. SB1100U-11:SE1604 SMA America 4-13...

  • Page 32: Connecting Communication Cables

    Sunny Boy and a PC (only one Sunny Boy can be connected per RS-232 serial cable). Requirements for RS-232 Communication: • The Sunny Boy 1100U must be equipped with an RS-232 Piggy-Back communica- tion module. • A cable no longer than 15 meters (49.2 ft.) with a minimum of two pairs of #24 AWG wires.
  • Page 33 Boy) PC running Sunny Data RS-232 Piggy-Back communication module No jumper installed for RS-232 communication Terminal block for RS-232 communication Communication cable gland Figure 4-8 Connecting a Sunny Boy to a PC with an RS-232 Cable SB1100U-11:SE1604 SMA America 4-15...

  • Page 34: Rs-485 Communication

    Sunny Boy models on the RS-485 communication bus. Requirements for RS-485 Communication: • The Sunny Boy 1100U must be equipped with an RS-485 Piggy-Back communica- tion module. • A 3 conductor cable no longer than 4000 feet (1200 meters) with a common shield, and a wire size no smaller than 24 AWG.
  • Page 35 Wiring and Connecting the Sunny Boy Connecting Communication Cables Figure 4-9 Detail of RS-485 Termination and Jumper Settings RS-485 Pinouts 2 - A (+) (Data+) 7 - B (-) (Data-) 5 - SR (Signal Ref.) SB1100U-11:SE1604 SMA America 4-17...

  • Page 36: Replacing The Cover

    3. Check the seal on the inside of the cover to ensure it is undamaged and in the correct position. 4. Carefully position the cover on the front of the Sunny Boy so that the four holes in the cover are aligned correctly with the four threaded holes in the case. 4-18 SMA America SB1100U-11:SE1604...
  • Page 37 6. Verify that the cover is in the correct position and that the seal is in place between the case and the cover. 7. Tighten the cover screws fully, and reinspect the seal to ensure that it is in the correct position. SB1100U-11:SE1604 SMA America 4-19...
  • Page 38 Wiring and Connecting the Sunny Boy Connecting Communication Cables 4-20 SMA America SB1100U-11:SE1604...

  • Page 39: Commissioning The Sunny Boy

    PV-array wiring as required by NEC Section 690.5 for PV systems installed on the roofs of dwellings. The PV array normally operates in a grounded configuration, where the array’s negative conductor is connected to the grounding system inside the inverter as a part of the ground-fault detection system. SB1100U-11:SE1604 SMA America...
  • Page 40 Allow- ing any light to reach the PV modules could expose you to hazardous voltages that can cause serious in- jury and/or death if you come in contact with them. SMA America SB1100U-11:SE1604...
  • Page 41 If the red LED remains on, the GFDI fuse is defective and must be replaced. Note: If the Sunny Boy is not operating as expected after the commissioning procedure is complete, refer to Section 6: Displays and Messages. SB1100U-11:SE1604 SMA America...
  • Page 42 Commissioning the Sunny Boy Figure 5-1 Commissioning Flowchart for the Sunny Boy 1100U If the Sunny Boy is not operating as expected after the commissioning procedure is complete, refer to Section 6: “Displays and Messages.” SMA America SB1100U-11:SE1604...
  • Page 43 Note: The Sunny Boy operates from the power produced by the PV array and is designed for minimal internal DC-power consumption. The maximum power the Sunny Boy 1100U will consume in normal operation is 4W. Note: Since the Sunny Boy operates from the power produced...
  • Page 44 Commissioning the Sunny Boy SMA America SB1100U-11:SE1604...

  • Page 45: Displays And Messages

    The red and yellow LEDs combined indicate that the GFDI has detected a ground fault. The ground fault must be located and cleared and the inverter reset manually. The inverter will not restart automatically after detecting a ground fault. SB1100U-11:SE1604 SMA America...
  • Page 46 Displays and Messages Figure 6-1 The Sunny Boy LED Status Indicator SMA America SB1100U-11:SE1604...
  • Page 47 Occasionally, during inclimate weather or low solar radiation, the LEDs may all turn on at once and then go off again. This indicates that the inverter is trying to initialize but the power available from the array is not sufficient to operate. This is not a malfunction. SB1100U-11:SE1604 SMA America...
  • Page 48 Note: If the inverter fails to connect to the utility grid 3 times in a row, it will wait 10 minutes before the next attempt. SMA America SB1100U-11:SE1604...
  • Page 49 “V-Const” or „U-Konst“ depending on which software you are using to access the parameters.) Derating The inverter is feeding power to the utility grid at a derated rate due to excessive heating of the heat sink. SB1100U-11:SE1604 SMA America...

  • Page 50: Fault Indicators

    CAUTION: For continued protection against the risk of fire, replace the GFDI fuse with fuses of the same type and rating only. The recommended type is a Littelfuse KLKD 1 Amp, 600V AC/DC SMA America SB1100U-11:SE1604...
  • Page 51 The Sunny Boy has detected a fault with the internal utility monitoring system. When the inverter detects a fault of this kind it will no longer connect to the utility grid. To correct this, the inverter must be serviced by a qualified service technician. SB1100U-11:SE1604 SMA America...
  • Page 52 CAUTION: Have the grid connection to the Sunny Boy checked only by a qualified electrician. WARNING: If troubleshooting methods require that you open the Sunny Boy inverter, do so only after disconnecting all sources of power to the Sunny Boy and waiting at least 5 minutes. SMA America SB1100U-11:SE1604...
  • Page 53 If this condition occurrs often, the actual grid impedance can be checked using the Sunny Boy Control or Sunny Data. High grid impedance can often be avoided or corrected by increasing the diameter of the AC cables between the grid connection and the inverter. SB1100U-11:SE1604 SMA America...
  • Page 54 The inverter has detected an input voltage that is too high for safe operation. WARNING: Disconnect the PV array from the Sunny Boy immediately! High input voltage can permanently damage the inverter. Have the PV array checked by a qualified technician. 6-10 SMA America SB1100U-11:SE1604...
  • Page 55 The code is repeated 3 times. If the condition remains the code will continue to be sent. The inverter has encountered a condition that makes it impossible to return to normal operation and will most likely require servicing. CAUTION: The Sunny Boy must be serviced only by a qualified technician. SB1100U-11:SE1604 SMA America 6-11...

  • Page 56: Communication Options

    Communication Options Sunny Boy inverters are available from the factory with different communication options installed depending upon your needs. The Sunny Boy 1100U series allows for both internal and external metering options to be used simaltaniously. These options may also be installed in the field by qualified technicians.
  • Page 57 Displays and Messages Status Messages on the Display The Sunny Boy 1100U is equipped with the „Sunny Display“ LCD in the lid. E-today 3.86kWh Mode E-today 3.86kWh Betrieb Mode Operation Erdschluss Earth Fault Photovoltaik-Stringwechselrichter Störung Photovoltaic string inverter Failure Stö...
  • Page 58 PV-voltage. Current AC power and AC voltage E-total 281.6kWh Finally the accumulated yield of the device since h-total 512h installation is displayed together with the total operating hours. Total energy yield and total operating hours 6-14 SMA America SB1100U-11:SE1604...
  • Page 59 "Measuring Channels and Messages" (page 6-18). Error „Error ROM“ indicates that the Sunny Boy has detected a defective firmware in the EEPROM. Contact SMA in order to remove this failure. Indication of defective fimware SB1100U-11:SE1604...
  • Page 60 DC input connectors WARNING: Disconnect the inverter from the supply voltage immediately, otherwise it can be severely damaged. Check the input voltage and your module configuration before you reconnect the DC voltage to the inverter again. 6-16 SMA America SB1100U-11:SE1604...
  • Page 61 English, French and German. Use the diagram and chart below for setting the display. Position of the switches for configuration of the Sunny Display language Language Switch S2 Switch S1 German English French Spanish Switch S2 Switch S1 Figure 6-3 Language Selecting Switches for the Sunny Display Option SB1100U-11:SE1604 SMA America 6-17...
  • Page 62 PV-voltage to earth Vpv-PE: current from PV-panels Ipv: E-Total (E-total): total energy yield h-Total (h-total): total operation hours Power On: total system start ups Sunny Boy serial number Serial Number: operating mode Mode: description of fault Error: 6-18 SMA America SB1100U-11:SE1604...
  • Page 63 Disturbance: A condition is only considered a Disturbance for as long as the reasons for this condition still are present. Error: A condition is considered an Error whenever the inverter cannot restart without user interaction. SB1100U-11:SE1604 SMA America 6-19...
  • Page 64 Displays and Messages Error messages In case of an error, the Sunny Boy 1100U generates the error code according to the operating mode and the detected error. Error Code Description Vac-Bfr The AC grid voltage is exceeding the permissible range. („Bfr“ or „Srr“...
  • Page 65 If you therefore often observe „dZac-Bfr“ or „dZac-Srr“ consult the utility company and ask, if it is permissable to change the grid monitoring pa- rameters of the inverter. Contact SMA about how to change the grid monitoring parameters of your Sunny Boy.
  • Page 66 • Void the UL Listing of the Sunny Boy • Void the warranty of the Sunny Boy • Could void any utility interconnection agreement Never change the operating parameters without explicit permission and instructions! Table 6-1 Operating Parameters of the Sunny Boy 1100U (changeable) Name Unit Range Default...
  • Page 67 EEPROM, i. e. parameters are only saved until next startup. The following parameters appear in parameter list but connot be modified: Table 6-2 Operating Parameters of the Sunny Boy 1100U (fixed) Name Unit Range...
  • Page 68 Displays and Messages 6-24 SMA America SB1100U-11:SE1604...

  • Page 69: Troubleshooting

    • If the system problem persists, contact technical support at: 530.273.4895 Ext.101 In order to better assist you when contacting SMA America, please provide the following information. This information is required before removing the inverter from service and prior to making a warranty claim.
  • Page 70 • Open circuit voltage (Voc) of the module • Number of modules in each string If it becomes necessary to send the Sunny Boy back to the manufacturer for service, please ship it in the original box to avoid damage during shipping. SMA America SB1100U-11:SE1604...
  • Page 71 • Consult the dealer or an experienced radio/TV technician for help. • Caution: Changes or modifications not expressly approved by SMA America, Inc. could void the user’s authority to operate this equipment. Contact SMA America for information...
  • Page 72 Troubleshooting SMA America SB1100U-11:SE1604...
  • Page 73 Sunny Boy SB1100U Specifications Real sine-wave, current source, high frequency PVM Inverter Technology 213 - 262 (240 V) AC Input Voltage AC Input Frequency 59.3 - 60.5 (60 Hz) Peak Power Tracking Voltage 125 - 400 V DC (at 240 V AC) 129 V DC Minimum DC Input Voltage 400 V DC...

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