SMA SBCBTL6 User manual
SBCBTLUS-IUS094510 | IMUS-SBCBTLUS | Version 1.0
US
Sunny Boy Accessories
SUNNY BOY COMBINER BOX TLUS
SBCBTL6
Installation Guide
SMA America, LLC Legal Restrictions
Installation Guide SBCBTLUS-IUS094510 3
Copyright © 2010 SMA America,LLC. All rights reserved.
No part of this document may be reproduced, stored in a retrieval system, or transmitted, in any form
or by any means, electronic, mechanical, photographic, magnetic or otherwise, without the prior
written permission of SMA America,LLC.
SMA America,LLC makes no representations, express or implied, with respect to this documentation
or any of the equipment and/or software it may describe, including (with no limitation) any implied
warranties of utility, merchantability, or fitness for any particular purpose. All such warranties are
expressly disclaimed. Neither SMA America,LLC nor its distributors or dealers shall be liable for any
indirect, incidental, or consequential damages under any circumstances.
(The exclusion of implied warranties may not apply in all cases under some statutes, and thus the
above exclusion may not apply.)
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
SMAAmerica,LLC reserves the right to make changes without notice and shall not be responsible for
any damages, including indirect, incidental or consequential damages, caused by reliance on the
material presented, including, but not limited to, omissions, typographical errors, arithmetical errors
or listing errors in the content material.
All trademarks are recognized even if these are not marked separately. Missing designations do not
mean that a product or brand is not a registered trademark.
The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and
any use of such marks by SMA America,LLC is under license.
SMA America, LLC
3801 N. Havana Street
Denver, CO 80239 U.S.A.
Important Safety Instructions SMA America, LLC
4 SBCBTLUS-IUS094510 Installation Guide
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions for the Sunny Boy Combiner Box that must be followed
during installation and maintenance of the Sunny Boy Combiner Box.
The Sunny Boy Combiner Box 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 Combiner Box. To reduce the risk of personal injury and
to ensure the safe installation and operation of the Sunny Boy Combiner Box, you must carefully read
and follow all instructions, cautions and warnings in this installation guide.
Warnings in this document
A warning describes a hazard to equipment or personnel. It calls attention to a procedure or practice,
which, if not correctly performed or adhered to, could result in damage to or destruction of part or all
of the SMA equipment and/or other equipment connected to the SMA equipment or personal injury.
DANGER
DANGER indicates a hazardous situation which, if not avoided, will result in death or
serious injury.
WARNING
WARNING indicates a hazardous situation which, if not avoided, could result in death or
serious injury.
CAUTION
CAUTION indicates a hazardous situation which, if not avoided, could result in minor or
moderate injury.
NOTICE
NOTICE is used to address practices not related to personal injury.
SMA America, LLC Important Safety Instructions
Installation Guide SBCBTLUS-IUS094510 5
Other Symbols in this document
In addition to the safety and hazard symbols described on the previous pages, the following symbol
is also used in this installation guide:
Markings on this product
The following symbols are used as product markings with the following meanings.
Information
This symbol accompanies notes that call attention to supplementary information that you
should know and use to ensure optimal operation of the system.
Warning regarding dangerous voltage
The product works with high voltages. All work on the product must be done as
described in it‘s documentation.
Electric arc hazards
The product has large electrical potential differences between its conductors. Arc flashes
can occur through air when high-voltage current flows. Do not work on the product
during operation.
Beware of hot surface
The product can become hot during operation. Do not touch the product during
operation.
Earth Ground
Observe the operating instructions
Read the product’s documentation before working on it. Follow all safety precautions
and instructions as described in the documentation.
UL1741 is the standard applied by Underwriters Laboratories to the Sunny Boy
Combiner Box to certify that it meets the requirements of the National Electrical Code®.
General Warnings SMA America, LLC
6 SBCBTLUS-IUS094510 Installation Guide
General Warnings
General Warnings
All electrical installations must be done in accordance with the local and National
Electrical Code® ANSI/NFPA 70. For installation in Canada the installations must be done
in accordance with applicable Canadian standards.
The Sunny Boy Combiner Box contains no user-serviceable parts. For all repair and
maintenance, always return the unit to an authorized SMA Service Center.
Before installing or using the Sunny Boy Combiner Box, read all of the instructions,
cautions, and warnings on the Sunny Boy Combiner Box in this installation guide.
Before connecting the Sunny Boy Combiner Box to the electrical utility grid, contact the
local utility company. This connection must be made only by qualified personnel.
Wiring of the Sunny Boy Combiner Box must be made by qualified personnel only.
SMA America, LLC Table of Contents
Installation Guide SBCBTLUS-IUS094510 7
Table of Contents
1 Notes on this manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1 Target group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.2 Validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.3 Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2 Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1 Appropriate usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1 Unpacking and inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3 Identifying the Sunny Boy Combiner Box . . . . . . . . . . . . . . . . . 13
4 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.2 Selecting the mounting location . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2.1 Conditions for installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2.2 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3 Wall mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3.1 Stone wall mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3.2 Wood wall mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3.3 Mounting the Sunny Boy Combiner Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5 Inserting the strings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6 Electrical connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.1 Connection area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.2 Fuse sizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.3 Connecting equipment ground . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.4 Connecting PV modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table of Contents SMA America, LLC
8 SBCBTLUS-IUS094510 Installation Guide
6.4.1 Inserting the string fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.4.2 Connecting the negative strings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.4.3 Connecting the positive strings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.5 Connecting the inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.5.1 Connecting DC+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.5.2 Connecting DC − . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8 Opening and closing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.1 Opening the Sunny Boy Combiner Box . . . . . . . . . . . . . . . . . . 27
8.2 Closing the Sunny Boy Combiner Box . . . . . . . . . . . . . . . . . . . 28
9 Replacing string fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
10 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
11 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
11.1 Cable requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
12 Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
SMA America, LLC Notes on this manual
Installation Guide SBCBTLUS-IUS094510 9
1 Notes on this manual
This manual describes the installation and commissioning of the Sunny Boy Combiner Box SBCBTL6.
Keep this manual in a convenient place for future reference
1.1 Target group
This manual is for qualified personnel only. Qualified personnel have received training and have
demonstrated skills and knowledge in the construction and operation of the device. Qualified
personnel are trained to deal with the dangers and hazards involved in installing electric devices.
1.2 Validity
This manual is valid for the Sunny Boy Combiner Box TLUS. It does not cover any details concerning
connected equipment. Information concerning the connected equipment is provided by the
manufacturer.
1.3 Nomenclature
In this document SMA America Production, LLC is referred to in the following as SMA. In this manual
the Sunny Boy Combiner Box TLUS is referred to as Sunny Boy Combiner Box.
Security SMA America, LLC
10 SBCBTLUS-IUS094510 Installation Guide
2 Security
2.1 Appropriate usage
The Sunny Boy Combiner Box is a string combiner connecting up to 6 strings and linking them to the
inverter. All inputs must be fused in accordance with National Electrical Code® NEC 690. The
Combiner Box is designed for the use with transformerless SMA PV inverters.
Principle of a PV power system with the Sunny Boy Combiner Box
Do not use the Sunny Boy Combiner Box for purposes other than those described here. Alternative
uses, modifications to the Sunny Boy Combiner Box or the installation of components not expressly
recommended or sold by the manufacturer void the warranty claims and operation permission.
The Sunny Boy Combiner Box can only be used in ungrounded array installations.
Position Description
APV modules
B Sunny Boy Combiner Box
C Sunny Boy with DC Disconnect
D AC main circuit breaker
ELoad
F Meter
GGrid
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