SMA SB 3000-US User Manual
CA
US
PV Inverter
SUNNY BOY 3000-US / 3800-US / 4000-US
Installation Manual
SB30-40-US-IA-en-34 | TBUS-SB30_40US | Version 3.4
SMA America, LLC Legal Restrictions
Copyright © 2013 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.
Neither SMA America,LLC nor SMA Solar Technology Canada Inc. makes 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 nor SMA Solar Technology Canada Inc. 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 and SMA Solar Technology Canada Inc. reserve 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 and SMA Solar Technology Canada Inc. is under
license.
SMA America, LLC
3801 N. Havana Street
Denver, CO 80239 U.S.A.
SMA Solar Technology Canada Inc.
2425 Matheson Blvd. E
8th Floor
Mississauga, ON L4W 5K5
Canada
Installation Manual SB30-40-US-IA-en-34 3
Important Safety Instructions SMA America, LLC
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions for the following products:
• Sunny Boy 3000-US / 3800-US / 4000-US
This manual must be followed during installation and maintenance.
The product 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 product. To reduce the risk of personal injury and to ensure the safe installation and
operation of the product, you must carefully read and follow all instructions, cautions and warnings
in this manual.
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.
Symbol Description
DANGER indicates a hazardous situation which, if not avoided, will result in
death or serious injury.
WARNING indicates a hazardous situation which, if not avoided, could result
in death or serious injury.
CAUTION indicates a hazardous situation which, if not avoided, could result
in minor or moderate injury.
NOTICE is used to address practices not related to personal injury.
Markings on this product
The following symbols are used as product markings with the following meanings.
Symbol Description
Warning regarding dangerous voltage
The product works with high voltages. All work on the product must only be
performed as described in the documentation of the product.
Beware of hot surface
The product can become hot during operation. Do not touch the product during
operation.
4 SB30-40-US-IA-en-34 Installation Manual
SMA America, LLC General Warnings
General Warnings
General Warnings
Al l el ect ric al ins tal lat ions m ust be m ade in acc ord anc e wi th the local and NationalElectrical Code
ANSI/NFPA 70 or the Canadian Electrical Code® CSAC22.1. This document does not and is not
intended to replace any local, state, provincial, federal or national laws, regulation or codes
applicable to the installation and use of the product, including without limitation applicable
electrical safety codes. All installations must conform with the laws, regulations, codes and
standards applicable in the jurisdiction of installation. SMA assumes no responsibility for the
compliance or noncompliance with such laws or codes in connection with the installation of the
product.
The product 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 product, read all of the instructions, cautions, and warnings in this
manual.
Before connecting the product to the electrical utility grid, contact the local utility company. This
connection must be made only by qualified personnel.
Wiring of the product must be made by qualified personnel only.
®
Installation Manual SB30-40-US-IA-en-34 5
General Warnings SMA America, LLC
6 SB30-40-US-IA-en-34 Installation Manual
SMA America, LLC Table of Contents
Table of Contents
1 Information on this Document. . . . . . . . . . . . . . . . . . . . . . 11
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1 Intended Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2 Skills of Electrically Qualified Persons. . . . . . . . . . . . . . . . . . . . 14
2.3 Safety Precaution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3 Scope of Delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.1 Sunny Boy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2 Type Labels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.2.1 Sunny Boy Type Label. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.2.2 DC Disconnect Type Labels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.3 DC Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.4 Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.5 Ground-Fault Protective Device (GFDI). . . . . . . . . . . . . . . . . . . 23
4.6 Arc-Fault Circuit Interrupter (AFCI) . . . . . . . . . . . . . . . . . . . . . . 24
4.7 Anti-Islanding Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.8 String Fuses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.1 Safety during Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.2 Selecting the Mounting Location. . . . . . . . . . . . . . . . . . . . . . . . 26
5.3 Mounting the Wall Mounting Bracket on a Stone Wall . . . . . . 29
5.4 Mounting the Wall Mounting Bracket on a Wooden Wall
with a Stud or a Post. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.5 Mounting the Wall Mounting Bracket on a Wooden Wall
with two Studs or on two Posts . . . . . . . . . . . . . . . . . . . . . . . . . 31
Installation Manual SB30-40-US-IA-en-34 7
Table of Contents SMA America, LLC
5.6 Mounting the DC Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.6.1 Inserting the DC Varistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.6.2 Mounting the DC Disconnect on the Wall . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.7 Mounting the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6 Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.1 Safety During Electrical Connection . . . . . . . . . . . . . . . . . . . . . 35
6.2 Overview of the Connection Area . . . . . . . . . . . . . . . . . . . . . . 36
6.2.1 Interior Connection Area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.2.2 Connection Area of the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.2.3 Connection Area of the DC Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.3 AC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.3.1 Inserting the AC Cables into the DC Disconnect. . . . . . . . . . . . . . . . . . . . . . 39
6.3.2 Connecting the AC Cables to the DC Disconnect. . . . . . . . . . . . . . . . . . . . . 40
6.3.3 Connecting the AC Cable of the DC Disconnect to the Inverter . . . . . . . . . . 41
6.4 DC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6.4.1 Inserting the DC Cables into the DC Disconnect. . . . . . . . . . . . . . . . . . . . . . 42
6.4.2 Grounding the DC Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
6.4.3 Grounding the DC Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
6.4.4 Connecting the DC Cables to the DC Disconnect. . . . . . . . . . . . . . . . . . . . . 46
6.4.5 Connecting the DC Cable of the DC Disconnect to the Inverter . . . . . . . . . . 47
6.5 Connecting the Combiner Box to the DC Disconnect . . . . . . . . 49
7 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.1 Automatic Line Voltage Detection. . . . . . . . . . . . . . . . . . . . . . . 51
7.2 Possible Grounding Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.3 Jumper Assignments for Grounding Systems . . . . . . . . . . . . . . 53
7.4 Changing the Display Language . . . . . . . . . . . . . . . . . . . . . . . 55
8 Commissioning the Inverter. . . . . . . . . . . . . . . . . . . . . . . . 56
8 SB30-40-US-IA-en-34 Installation Manual
SMA America, LLC Table of Contents
9 Opening and Closing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
9.1 Opening the Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
9.2 Closing the Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
9.3 Opening the DC Disconnect. . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9.4 Closing the DC Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
10 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
10.1 LED Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
10.2 Measurement Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
10.3 Operating Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
10.4 Display messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
10.4.1 Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
10.4.2 Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
10.4.3 Resetting "Error AFCI" Disturbance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
11 Cleaning and Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
11.1 Cleaning the Ventilation Grids . . . . . . . . . . . . . . . . . . . . . . . . . 78
11.2 Cleaning the Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
11.3 Checking the Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
11.4 Checking the DC Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . 82
11.5 Checking and Replacing the DC Varistors . . . . . . . . . . . . . . . . 82
11.6 Checking the PV Plant for a ground-fault . . . . . . . . . . . . . . . . . 85
11.7 Replacing the Ground Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
11.8 Replacing String Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
12 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
12.1 DC⁄AC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
12.1.1 Sunny Boy 3000-US . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
12.1.2 Sunny Boy 3800-US . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
12.1.3 Sunny Boy 4000-US . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
12.2 General Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Installation Manual SB30-40-US-IA-en-34 9
Table of Contents SMA America, LLC
12.3 Protection Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
12.4 DC Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
12.5 Torques and Cable Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
12.6 Tripping Limits/Tripping Times. . . . . . . . . . . . . . . . . . . . . . . . . . 97
13 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
14 Compliance Information . . . . . . . . . . . . . . . . . . . . . . . . . . 98
15 Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
10 SB30-40-US-IA-en-34 Installation Manual
SMA America, LLC 1 Information on this Document
1 Information on this Document
Validity
This document is valid for the following device types:
• SB 3000US • SB 3000US-12
• SB 3800-US-10 • SB 3800-US-12
• SB 4000US • SB 4000-US-12
Target group
This document is for electrically qualified persons. Only skilled workers are allowed to perform the
tasks set forth in this document (see Section 2.2 "Skills of Electrically Qualified Persons", page 14).
Additional information
Additional information is available at www.SMA-America.com.
Symbols
Symbols Explanation
DANGER indicates a hazardous situation which, if not avoided, will result in
death or serious injury.
WARNING indicates a hazardous situation which, if not avoided, could result
in death or serious injury.
CAUTION indicates a hazardous situation which, if not avoided, could result
in minor or moderate injury.
NOTICE is used to address practices not related to personal injury.
Indicates information that is important for a specific topic or objective, but is
not safety-relevant.
☐ Indicates a requirement for meeting a specific goal.
☑ Desired result
✖ A problem that could occur
Installation Manual SB30-40-US-IA-en-34 11
1 Information on this Document SMA America, LLC
Typography
Typography Usage Example:
"light" • Display messages
• Parameters
• The inverter switches to
"Balanced" mode.
•Terminals
•Slots
bold • Elements to be selected
• Elements to be entered
• Select the parameter FanTest and
set to 1.
Nomenclature
The following nomenclature is used in this document:
Complete designation Designation in this document
SMA America, LLC SMA
SMA Solar Technology Canada Inc. SMA
Sunny Boy 3000-US/3800-US/4000-US Inverter/Sunny Boy
Abbreviations
Abbreviations Designation Explanations
AC Alternating Current -
AFCI Arc-Fault Circuit Interrupter -
CCU Current controlling unit -
DC Direct Current -
EEPROM Electrical Eraseable
Programmable Read Only
Memory
FCC Federal Communications
US agency for communication
Commission
GFDI ground-fault Detection
Interruption
LED Light-Emitting Diode -
MPP Maximum Power Point -
MPPT Maximum Power Point Tracker -
OCU Operational Control Unit -
PV Photovoltaics -
12 SB30-40-US-IA-en-34 Installation Manual
SMA America, LLC 2 Safety
2Safety
2.1 Intended Use
The Sunny Boy is a PV inverter that converts the direct current from the PV array into alternating
current.
Figure 1: Principle of a PV plant with Sunny Boy
Position Designation
APV array
B Sunny Boy with DC Disconnect
CLoad
DEnergy meter
E Power distribution grid
You can use the alternating current generated as follows:
Household grid: Energy flows into the household grid. The loads connected, for example
household devices or lighting, consume the energy. The energy left over is
fed i nto the power dist ribution grid. Wh en the Sunny Boy is no t generating
any energy, e.g. at night, the loads that are connected are supplied by the
power distribution grid. The Sunny Boy does not have its own energy
meter. When energy is being fed into the power distribution grid, the
energy meter runs in reverse.
Power distribution grid: Energy is fed directly into the power distribution grid. The Sunny Boy is
connected to a separate energy meter. Depending on the electric utility
company, you will be remunerated accordingly for the energy generated.
Stand-alone grid: The Sunny Boy is connected to a stand-alone grid. A stand-alone grid is a
grid that is not connected to a power distribution grid. The Sunny Boy
needs a grid-forming generator, for example a Sunny Island, in order to
function. The energy generated is consumed directly on site; surplus
energy can be stored in batteries.
Installation Manual SB30-40-US-IA-en-34 13
2 Safety SMA America, LLC
The Sunny Boy is suitable for indoor and outdoor use.
The PV modules used must be suitable for use with the Sunny Boy and must be approved by the
module manufacturer. Do not connect any energy sources other than PV modules to the Sunny Boy.
The corresponding plant design may require the use of protective devices (see
National Electrical Code
®
690.9). For installations in Canada, the installation must be carried out in
accordance with the applicable Canadian standards.
For safety reasons, it is forbidden to modify the product or install components that are not explicitly
recommended or distributed by SMA America, LLC for this product.
Use the Sunny Boy in accordance with the information provided in the enclosed documentation only.
Any other use can result in personal injury or property damage.
The enclosed documentation is an integral part of this product.
• Read and adhere to the documentation.
• Keep the documentation in a convenient place for future reference.
2.2 Skills of Electrically Qualified Persons
The tasks described in this document are intended for skilled persons only. Electrically qualified
persons must have the following skills:
• Knowledge of how an inverter works and is operated
• Training in how to deal with the dangers and risks associated with installing and using electrical
devices and plants
• Training in the installation and commissioning of electrical devices and plants
• Knowledge of all applicable standards and directives
• Knowledge of and adherence to this document and all safety precautions
14 SB30-40-US-IA-en-34 Installation Manual
SMA America, LLC 2 Safety
2.3 Safety Precaution
Danger to life due to high voltages in the inverter
High voltages capable of causing electric shocks are present in the conductive components of the
inverter.
• All work on the inverter may be carried out by an electrically qualified person only.
• All work on the inverter should only be carried out as described in this document.
• The performance of work on the inverter is only permitted when the inverter is dead.
• Only commission the inverter when the enclosure lid is closed.
Risk of burns due to hot enclosure parts
Some parts of the enclosure can become hot during operation.
• During operation, touch the enclosure lid only.
Damage to the inverter due to electrostatic discharges
The inverter may be destroyed or damaged by electric discharges due to electronic components
being touched.
• Ground yourself before touching any components.
Installation Manual SB30-40-US-IA-en-34 15
3 Scope of Delivery SMA America, LLC
3Scope of Delivery
Check the delivery for completeness and any externally visible damage. Contact your specialty
retailer if the delivery is incomplete or damaged.
Figure 2: Components included in delivery
Position Quantity Designation Explanation
A1Sunny Boy ‒
B 2 Ventilation grid For closing the recessed grips
C 1 Wall mounting bracket ‒
D 2 Replacement jumper For the fan test
E1DC Disconnect ‒
F 1 M6x16 cheese-head screw As spare part for closing the enclosure lid
on the Sunny Boy
G 2 M6x10 cheese-head screw For attaching the Sunny Boy to the wall
mounting bracket
2 M6x10 cheese-head screw For attaching the DC Disconnect to the
wall mounting bracket
1 M6x10 cheese-head screw For closing the cover on the DC Disc onnect
16 SB30-40-US-IA-en-34 Installation Manual
SMA America, LLC 3 Scope of Delivery
Position Quantity Designation Explanation
H 6 Conical spring washer For M6x10 cheese-head screws and
M6x16 cheese-head screw
I3DC varistor* ‒
K 1 Insertion tool* For DC varistors
L 1 Installation manual, user
‒
manual, document set with
explanations and certificates
* Only applies for SB 3000US-12/SB 3800-US-12/SB 4000US-12
Installation Manual SB30-40-US-IA-en-34 17
4 Product Description SMA America, LLC
4 Product Description
4.1 Sunny Boy
The Sunny Boy is a PV inverter which converts the direct current of the PV array to alternating current
and feeds it into the power distribution grid.
Figure 3: Sunny Boy design
Position Designation
A Ventilation grids (left and right)
B Type labels
CDC Disconnect
DLEDs
EDisplay
FEnclosure lid
18 SB30-40-US-IA-en-34 Installation Manual
SMA America, LLC 4 Product Description
Symbols on the Inverter
Symbol Designation Explanation
Tap symbol You can operate the display by tapping on the
enclosure lid:
• To switch on the backlight, tap once.
• To switch to the next displayed message, tap
once.
• To restart the inverter, tap once.*
• To display the serial number and designation of
the inverter, the firmware version, and the status
of the Power Balancer (if activated) one after
the other during operation, tap twice in
succession.*
Green LED Indicates the operating state of the inverter
(see Section 10.1).
Red LED Indicates the status of the grounding fuse
(see Section 10.1).
Yellow LED Indicates a fault or a disturbance
(see Section 10.4.2).
* Applies for SB 3000US-12⁄SB 3800-US-12⁄SB 4000US-12 only
Installation Manual SB30-40-US-IA-en-34 19
4 Product Description SMA America, LLC
4.2 Type Labels
4.2.1 Sunny Boy Type Label
The type label provides a unique identification of the inverter. The type label is on the right-hand side
of the enclosure.
Figure 4: Layout of the Sunny Boy type label
Position Designation Explanation
AModel Device type
B Serial no. Inverter serial number
C Device-specific characteristics ‒
You require the information on the type label to use the inverter safely and for customer support at the
SMA Service Line. The type label must be permanently affixed to the inverter.
20 SB30-40-US-IA-en-34 Installation Manual
SMA America, LLC 4 Product Description
A
B
www.sma-solar.com
Utility interactive inverter
LISTED UL 1741 36AN
DC-Disconnect
DC-DisconU-XX
Item No.l
Date of manufacture
Max. system voltage under all conditions*
SMA Solar Technology AG
Engineered in Germany
DE34
XX/XXXX
XXXX Vdc
CAN/CSA C22.2 No.107.1-1
DC max operating current*
XXXX Adc
Max. string fuse rating*
XXXX Adc
Operating temperature range*
-XX °F to +XXX °F (-XX °C to +XX °C)
ENCLOSURE
Type 3R
SB 3000US / SB 3000US-12 / SB 38000-US-10 /
SB 3800-US-12 / SB 4000US / SB 4000 US-12 /
SB 5000US / SB 5000US-11 / SB 5000US-12 /
SB 6000US / SB 6000US-11 / SB 6000US-12 /
SB 7000US / SB 7000US-11 / SB 7000US-12 /
SB 8000US / SB 8000US-11 / SB 8000US-12
* For mor details and for tightening torque,
allowable wire size and type see the
Installation Guide
AC max voltage and rated current*
XXX V / XX A
This unit is UL approved for use with
PV arrays and the inverter types
4.2.2 DC Disconnect Type Labels
The type labels provide a unique identification of the DC Disconnect. The type label is on the righthand side of the enclosure.
Figure 5: Layout of the DC Disconnect type label
Position Designation Explanation
AItem No.I Device type
B Device-specific characteristics ‒
Installation Manual SB30-40-US-IA-en-34 21
4 Product Description SMA America, LLC
A
www.sma-solar.com
DC-Disconnect
XXXXXXXXXX
Serial No.
SMA Solar Technology AG
Engineered in Germany
DE34
DC-DisconU-XX
Item No.
XXXXXXXX
Date of manfuacture
Figure 6: Layout of the DC Disconnect type label
Position Designation Explanation
A Serial no. DC Disconnect serial number
You require the information on the type labels to use the DC Disconnect safely and for customer
support at the SMA Service Line. The type labels must be permanently affixed to the DC Disconnect.
Symbols on the type labels
Observe the operating instructions
Read the relevant documentation before working on the product. Follow all safety
precautions and instructions as described in the documentation.
Evaluated to the requirements of the Underwriters Laboratories Standard for
Safety for Inverters, Converters, Controllers and Interconnection System
Equipment for Use With Distributed Energy Resources, UL 1741.
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SMA America, LLC 4 Product Description
4.3 DC Disconnect
The DC Disconnect safely disconnects the PV array from the inverter.
Figure 7: DC Disconnect design
Position Designation
ARotary Switch
BCover
The DC Disconnect connects the PV array to the inverter. Turning the rotary switch interrupts the flow
of current and the DC cabling can be safely disconnected from the inverter.
4.4 Communication
The inverter can be equipped with a communication module for wired communication with special data
capture devices or a PC with corresponding software (for information on supported communication
products connected to with the communication module, see www.SMA-America.com).
4.5 Ground-Fault Protective Device (GFDI)
According to the National Electrical Code®, Section 690.5, the Sunny Boy has a system for detecting
ground-fault errors in the PV array.
The PV array is operated in a grounded configuration. The grounding of a PV plant is established as
per the specifications of Section 690.41 to 690.47 of the National Electrical Code® ANSI/NFPA
70 and is the responsibility of the electrically qualified person. Installations in Canada must be carried
out in accordance with the applicable Canadian standards.
De pen din g on the pla nt t ype , the cabl e fo r DC + or DC − of t he P V ar ray is c onn ect ed t o the grou ndi ng
system in the Sunny Boy. According to UL 1741, the GFDI is always active when the DC voltage
present is sufficient for switching on the display in the Sunny Boy.
If the ground-fault current exceeds 1 A, the Sunny Boy switches off and displays a disturbance. After
the ground-fault has been located and eliminated, the ground-fault disturbance must be cleared
manually. Following this, the Sunny Boy resumes operation.
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4 Product Description SMA America, LLC
4.6 Arc-Fault Circuit Interrupter (AFCI)
According to the National Electrical Code®, Section 690.11, the Sunny Boy has a system for electric
arc detection and interruption.
An ele ctr ic a rc w ith a po wer of 3 00 W o r gr eat er m ust be i nte rru pted by the AFCI in the time specified
by UL 1699B. A tripped AFCI may only be reset manually.
On ly t he f oll owi ng S unn y Boy devi ce t ype s ar e eq uip ped wit h an automatic arc-fault circuit interrupter
(AFCI):
• SB 3000-US-12
• SB 3800-US-12
• SB 4000-US-12
The 2011 edition of the National Electrical Code
PV plants attached to a building must be fitted with a means of detecting and disconnecting serial
electric arcs on the PV side.
The automatic arc-fault circuit interrupter can be deactivated in the "Installer" mode via the
communication device if this function is not desired.
®
, Section 690.11, stipulates that newly installed
4.7 Anti-Islanding Protection
The Sunny Boy has an active safety algorithm to protect against islanding.
A stand-alone grid occurs when the power distribution grid is switched off and the Sunny Boy attempts
to continue to feed in to the power distribution grid. For this to happen, the remaining load must be
resonant at 60 Hz and exactly match the power of the Sunny Boy. The effect of the safety algorithm
is that, in the event of the power distribution grid being switched off, the PV plant does not supply any
current to a symmetrical load that is resonant at 60 Hz.
4.8 String Fuses
The DC Disconnect is supplied with 4 string fuses (one fuse per string) designed for 15 A and 600 V.
With string fuses, the DC Disconnect can protect the PV modules from potential reverse currents.
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5Mounting
5.1 Safety during Mounting
Risk of injury due to inverter falling over
Potential risk of bruising and broken bones due to the heavy weight of the inverter.
• When mounting the inverter, note that it has a weight of 88 lb. (40 kg).
• Use appropriate mounting material for the mounting location of the inverter:
– For mounting on plasterboard, do not use hollow-wall anchors or toggle bolts.
– Wooden supporting studs or posts must be present behind the mounting points on
plasterboard.
• Use suitable lifting device when mounting.
The inverter can become hot during operation
Potential burn injuries when touching the enclosure.
• Install the inverter in such a way that it cannot be touched accidentally.
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5 Mounting SMA America, LLC
5.2 Selecting the Mounting Location
Requirements for the mounting location:
Danger to life due to fire or explosions
With electrical devices, there is always a certain danger that a fire may break out.
• Do not mount the inverter in the vicinity of combustible materials.
• Do not mount the inverter in areas where highly flammable materials are stored.
• Do not mount the inverter in a potentially explosive atmosphere.
☐ The mounting must be on a stable surface, e.g. concrete and other walls.
☐ The mounting location must be suitable for the weight and dimensions of the inverter
(see Section 12 "Technical Data", page 90).
☐ In living areas, make sure that the mounting surface is not made of plasterboard or similar.
The inverter makes noises when in use, which can be perceived as a nuisance in a living area.
☐ Studs must be present behind the mounting points on plasterboard sheets or panels.
☐ The mounting location must be clear and have safe access at all times without the use of
additional aids being necessary (such as scaffolding or lifting pla tfo rms ). N on- ful fil lme nt of t hes e
criteria may restrict servicing.
☐ The mounting location must not be exposed to direct solar irradiation. Direct solar irradiation
can overheat the inverter. As a result, the inverter reduces its power output.
☐ The mounting location must not be exposed to direct sources of water spray such as sprinklers
or gutters.
☐ The ambient temperature must be within a permissible range (see Section 12 "Technical
Data", page 90). This ensures optimal operation of the inverter.
☐ The mounting location must be inaccessible to children.
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Wall mounting bracket dimensions:
Figure 8: Dimensions of the wall mounting bracket
Observe recommended clearances:
Figure 9: Recommended clearances for mounting the inverter
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5 Mounting SMA America, LLC
• If the inverter is mounted outdoors, the clearance below the inverter must amount to 3 ft. (900 mm).
This prevents the ingress of waterspray into the inverter.
• O bse rve rec omm end ed c lea ran ces to the wal ls a s we ll a s to oth er inverters or objects. Thus, you
will prevent the inverter's power output from being reduced due to excessive temperatures.
• If multiple inverters are mounted in areas with high ambient temperatures, increase the
clearances between the inverters and ensure sufficient fresh-air supply. Thus, you will prevent
the inverter's power output from being reduced due to excessive temperatures.
• Do not mount inverters on top of one another. This prevents the upper inverter from drawing in
the heated air from the lower inverter.
Prescribed clearances
®
Under certain conditions, the National Electrical Code
specifies greater clearances. Ensure
that you adhere to the prescribed clearances according to the National Electrical Code®,
Paragraph 110.26.
Installations in Canada must be carried out in accordance with the applicable Canadian
standards.
Observe permitted mounting position:
Figure 10: Permitted and prohibited mounting positions
• Mount the inverter in a permitted mounting position at eye level. This ensures that there can be
no ingress of moisture into the inverter and you can read out display messages and LED signals
without any problems.
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5.3 Mounting the Wall Mounting Bracket on a Stone Wall
Additional required mounting material (not included in the scope of delivery):
☐ 3 screws suitable for the foundation.
☐ 3 washers suitable for the screws.
☐ 3 screw anchors suitable for the foundation and for the screws.
1. Position the wall mounting bracket at the installation location. Tip: The bottom end of the wall
mounting bracket reaches approximately to the bottom corner of the inverter.
2. Align the bracket with a spirit level.
3.
Danger to life from electric shock due to damage to electric lines
Electric lines may be located behind the installation points which can be damaged when
mounting the inverter.
• Ensure that no electric lines are located behind the installation points.
4. Use the wall mounting bracket as a template. For this purpose, mark the oblong holes at the
extreme left and right as well as the lowest oblong hole in the middle of the wall mounting
bracket.
5. Remove the bracket from the wall.
6. Bore drill holes at the markings.
7. Insert suitable screw anchors into the drill holes.
8. Insert screws with washers through the oblong
holes of the wall mounting bracket into drill holes.
9. Tighten the screws. Ensure that no screws are loose.
10. Ensure that the wall mounting bracket is firmly positioned.
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5 Mounting SMA America, LLC
5.4 Mounting the Wall Mounting Bracket on a Wooden Wall with a Stud or a Post
Additional required mounting material (not included in the scope of delivery):
☐ 3 screws suitable for the foundation.
☐ 3 washers suitable for the screws.
1. Position the wall mounting bracket at the installation location. Tip: The bottom end of the wall
mounting bracket reaches approximately to the bottom corner of the inverter.
2. Align the bracket with a spirit level.
3.
Danger to life from electric shock due to damage to electric lines
Electric lines may be located behind the installation points which can be damaged when
mounting the inverter.
• Ensure that no electric lines are located behind the installation points.
4. Use the wall mounting bracket as a template. For this purpose, mark both uppermost oblong
holes and the lowest oblong hole in the center of the wall mounting bracket.
5. Remove the bracket from the wall.
6. Bore drill holes at the markings.
7. Insert screws with washers through the oblong holes
of the wall mounting bracket into drill holes.
8. Tighten the screws. Ensure that no screws are loose.
9. Ensure that the wall mounting bracket is firmly positioned.
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