Autarco UX Series User manual

© Autarco Group B.V. IM-S2.UX-EN-V1.4
Installation and Operation Manual
Solar Inverters UX series

2 UX-series Inverters
Contact Information
Autarco Group B.V.
Schansoord 60
5469 DT Erp
The Netherlands
www.autarco.com
[email protected]
Other Information
This manual is an integral part of the unit. Please read the manual carefully before installation, operation or
maintenance. Keep this manual for future reference.
Product information is subject to change without notice. All trademarks are recognized as the property of their
respective owners.
© Autarco Group B.V.
All rights reserved.

Installation and operation manual
IM-S2-UX-EN-V1.4 3
Table of Contents
1. Introduction 4
1.1 Read this first 4
1.2 Target Audience 4
1.3 Product versions covered by this document 5
2. Preparation 6
2.1 Safety instructions 6
2.2 Package contents 7
2.3 Internal DC switch 7
2.4 Explanations of symbols on inverter 7
3. Product information 8
3.1 Overview 8
3.2 Product identification 8
3.3 Product overview 9
4. Installation 10
4.1 Safety 10
4.2 Appropriate Mounting Location 10
4.3 Mounting instructions 11
4.4 Safety clearance 12
4.5 Mounting procedure 13
5. Electrical installation 14
5.1 Grounding 14
5.2 AC connection 16
5.3 Additional Protections 19
5.4 DC connections 20
5.5 Inverter commissioning sequence 21
6. Operation 22
6.1 LED indicator lights 22
6.2 Inverter display 22
6.3 Information 22
6.4 Settings 24
6.5 Advanced info 25
6.6 Advanced Settings 26
6.7 Temperature derating 28
6.8 External fan 28
7. Monitoring setup and system registration 29
7.1 The following products are available to monitor UX series inverters: 30
8. Maintenance 31
8.1 Fan Maintenance 31
9. Disposal 33
10. Troubleshooting 33
10.1 General 33
10.2 Internal component fault 33
10.3 Grid errors 34
10.4 System and design fault 35
11. Product specifications 36

4 UX-series Inverters
1. Introduction
1.1 Read this first
This manual contains important information for use during installation and maintenance of the UX series
Autarco inverter.
To reduce the risk of electrical shock, and to ensure the safe installation and operation of the UX series Autarco
inverters, the following safety symbols appear throughout this document to indicate dangerous conditions and
important safety instructions.
WARNING! Indicates safety instruction, which if not correctly followed, can result in injury or
property damages.
RISK OF ELECTRIC SHOCK! Indicates safety instructions, which if not correctly followed, could
result in electric shock.
HOT SURFACE! Indicates safety instructions, which if not correctly followed, could result in
burns.
1.2 Target Audience
This manual is intended for anyone who uses Autarco UX series inverter. Before any further action, the
operators must first read all safety regulations and be aware of the potential danger to operate high-voltage
devices. Operators must also have a complete understanding of this device’s features and functions.
ATTENTION! Qualified personnel means a person with valid license from the local authority in:
●Installing electrical equipment and PV power systems (up to 1000 V).
●Applying all applicable installation codes and using Personal Protective Equipment.
●Analyzing and reducing the hazards involved in performing electrical work.
WARNING! Do not use this product unless it has been successfully installed by qualified personnel
in accordance with the instructions in chapter 4 “Installation”.

Installation and operation manual
IM-S2-UX-EN-V1.4 5
1.3 Product versions covered by this document
The main purpose of this user manual is to provide instructions and detailed procedures for installing, operating,
maintaining, and troubleshooting the UX series of Autarco inverters which includes the following models:
●S2.UX40000(S)
●S2.UX50000(S)
●S2.UX60000(S)
●S2.UX50000-HV(S)
●S2.UX60000-HV(S)
●S2.UX70000-HV(S)
The “S2.” In the product code means the product is a grid-tied inverter.
The item code or SKU will include an additional number at the end. The final number references the default grid
standard and colour of inverter. For example, S2.UX50000S.1 is the 50kW model with Dutch grid standard as
default and Autarco blue cover.
If the product has an “S” at the end it comes with integrated DC switches.
Please keep this user manual available at all times in case of emergency.

6 UX-series Inverters
2. Preparation
2.1 Safety instructions
DANGER! Do not touch any internal components whilst the inverter is in operation.
DANGER! Do not stand close to the inverter during severe weather conditions such as lighting,
etc.
Make sure you completely cover the surface of all PV arrays with opaque (dark) material before
wiring them or make sure the DC circuit breaker or equivalent DC isolator is disconnected.
This is because photovoltaic (PV) arrays create electrical energy when exposed to light, and could
cause a hazardous condition.
The UX series inverter must only be operated with PV arrays of protection class II, in accordance
with IEC 61730, class A.
WARNING! The PV inverter will become hot during operation; please don’t touch the heat sink or
peripheral surface during or shortly after operation.
NOTICE! Do not directly connect AC output of the inverter to any private AC equipment. The PV
inverter is designed to feed AC power directly into the public utility power grid.
WARNING! The installation, service, recycling and disposal of the inverters must be performed by
qualified personnel in compliance with national and local standards and regulations.
Please contact your dealer to get the information of authorized repair facility for any
maintenance or repairmen.
Any unauthorized actions including modification of product functionality of any form will affect the validation of
warranty service; Autarco may deny the obligation of warranty service accordingly.

Installation and operation manual
IM-S2-UX-EN-V1.4 7
2.2 Package contents
Autarco UX series inverter
Mounting bracket
+ screws
12xMC4 connector
pairs
(S4.MC4F/MC4M)
Instruction manual
2.3 Internal DC switch
Please verify whether your Autarco UX series inverter is equipped with internal DC switches. This switch can be
found on the bottom of the inverter. If there isn’t an internal DC switch it is important to apply an external DC
disconnector in order to completely disconnect the solar PV module strings from the inverter.
2.4 Explanations of symbols on inverter
10min
DANGER - HIGH ELECTRIC VOLTAGE
This device is directly connected to public grid. All work to the inverter shall be
carried out by qualified personnel only. There might be residual currents in
inverter for up to 10 minutes because of large capacitors.
ATTENTION
This device is directly connected to electricity DC generators and the public AC
grid.
DANGER – HOT SURFACES
The components inside the inverter will get hot during operation, DO NOT touch
aluminum housing during operating.
ATTENTION
In case of any work to the inverter, always refer to this manual for detailed
product information.
ATTENTION
This device SHALL NOT be disposed of in residential waste. Please go to Chapter 9
“Recycling and Disposal” for proper treatments.
CE MARK
This equipment conforms to the basic requirements of the EU guideline governing
low voltage and electromagnetic compatibility.

8 UX-series Inverters
3. Product information
3.1 Overview
Autarco UX series grid tied inverters are state of the art, high efficiency, robust and reliable grid tied inverters at
the best price quality ratio available. They are easy to install and carry a standard 10 year product warranty. Our
rigorous quality control and testing facilities guarantee Autarco inverters meet the highest quality standards
possible. These inverters are the key to our international track record of delivering extremely reliable solar
power solutions.
Key features:
●Maximum efficiency of 98.8%
●Wide MPPT voltage range
●Low turn off voltage
●High enclosure protection class IP65
●Intelligent redundant fan-cooling
●Standard ten year product warranty
●Multiple monitoring options
●Optional integrated DC switch
For full specifications please see chapter 11 “Product specifications”.
3.2 Product identification
You can identify the inverter by the serial number (S/N) sticker on the side of the inverter. Important electrical
specification can also be found on the label which can be found on the right side of the inverter housing. Do not
remove the label or the serial number as this voids the product warranty.

Installation and operation manual
IM-S2-UX-EN-V1.4 9
3.3 Product overview
A: Inverter cover
B: LED light – POWER
C: LED light – OPERATION
D: LED light – ALARM
E: LCD display 2x16 characters
F: Escape key
G: Up key
H: Down key
I: Enter key
J: DC switches (optional)
K: DC inputs MPPT 1-4
L: External Intelligent Fans*
M: Communication ports
N: AC terminal block and cover
B C D
E
F G H I
J K L M N
* The S2.UX40000(S) and S2.UX50000(S) have two fans, the
S2US60000(S) has three fans.

10 UX-series Inverters
4. Installation
4.1 Safety
DANGER! Do not install the inverter near flammable or explosive items.
WARNING! The installation must be performed by qualified personnel and in compliance with
national and local standards and regulations.
This inverter will be connected to a high voltage DC power generator and AC grid. Inappropriate
installation may also jeopardize the life span of the inverter.
The installation site must have good ventilation conditions. Direct exposure to intense sunshine
is not recommended.
4.2 Appropriate Mounting Location
The heat sink can reach a temperature of 75⁰C under operation.
●Make sure the mounting wall is strong enough to hold the weight of the inverter.
●The ambient temperature of installation site should be between -20 ⁰C and +60 ⁰C.
●Make sure of ample ventilation at installation site, insufficient ventilation may reduce the performance
of the electronic components inside the inverter and shorten the life span of the inverter.
●The inverter has fans that will intelligently cool the inverter if the internal components exceed 100⁰C.
The fan noise should not exceed 60dB.

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IM-S2-UX-EN-V1.4 11
4.3 Mounting instructions
Two people are required to remove the inverter from the carton and install the inverter.
Handles are formed into the heatsink for ease of handling the inverter.
●The inverter is suitable for outdoor and indoor installation.
●Vertical installation is recommended, with a maximum inclination of 15⁰ backwards.
Max. 15⁰

12 UX-series Inverters
4.4 Safety clearance
CAUTION! Make sure heat sinks are out of reach of children.
WARNING! When installing multiple inverters, make sure there is sufficient clearance between
them. High temperatures may affect performance.
Observe the following minimum clearances to walls and other inverters
Min. 500mm
Min. 500mm
Min. 500mm
Min. 500mm

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IM-S2-UX-EN-V1.4 13
4.5 Mounting procedure
Step 1 —Mount the wall bracket onto the mounting wall with appropriate screws plugs
Step 2 —Lower the inverter onto the bracket
Step 3 —Use screws in the packaging to fix the bottom of the inverter to the mounting bracket

14 UX-series Inverters
5. Electrical installation
DANGER! This inverter will be connected to a high voltage DC power generator and AC grid. The
installation must be performed by qualified personnel and in compliance with national and local
standards and regulations
5.1 Grounding
DANGER! Never connect or disconnect the connectors under load.
NOTICE! The AC connection to the electrical distribution grid must be performed only after
receiving authorization from the utility that operates the grid.
NOTICE! Make sure to set the correct grid standard as part of system commissioning, see
chapeter 6.6.
There are two options for ground protection: through grid terminal connection and external heat sink
connection.
If AC terminal is used to connect ground, please refer to the contents of 5.3.2.
If the heat sink is used to connect the ground, please follow the steps below.
1) Prepare the grounding cable: recommended to use the 16-35mm² outdoor copper-core cable.
2) Prepare OT terminals M6
IMPORTANT! For multiple inverters in parallel, all inverters should be connected to the same
ground point to eliminate the possibility of a voltage potential existing between inverters
grounds.
WARNING! No matter what kind of grounding connection is adopted, it is strictly forbidden to
connect the ground of the inverter with the lightning protection of the building, otherwise
Autarco will not be responsible for any damage caused by lightning.

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IM-S2-UX-EN-V1.4 15
3) Strip the grounding cable insulation to the suitable length as shown in Figure 5.7.
IMPORTANT! B (insulation stripping length) is 2-3mm longer than A (OT cable terminal crimping
area)
4) Insert the stripped wire into the OT terminal crimping area, and use the hydraulic clamp to crimp the
terminal to the wire (as shown in Figure 5.8).
IMPORTANT! After crimping the terminal to the wire, inspect the connection to ensure the
terminal is solidly crimped to the wire.
5) Remove the screw from the heat sink ground point

16 UX-series Inverters
6) Use the screw of the ground point to attach the grounding cable. Tighten the screw securely. Torque is
3Nm (as shown as in Figure 5.9).
IMPORTANT! In order to improve the corrosion resistance of the grounding terminal, we
recommend that the external grounding terminal is coated with silica gel or paint for protection
after installation of the grounding cable.
5.2 AC connection
DANGER! Never connect or disconnect the connectors under load.
NOTICE! The AC connection to the electrical distribution grid must be performed only after
receiving authorization from the utility that operates the grid.
The AC cable used must be dimensioned in accordance with any local and national directives on cable
dimensions which specify requirements for the minimum conductor cross-section. Cable dimensioning factors
are e.g.: nominal AC current, type of cable, type of routing, cable bundling, ambient temperature and maximum
specified line losses.
We recommend 16- 35mm2105 ℃cable with resistance lower than 1.5 ohm.
Please make sure the resistance of cable is lower than 1.5 ohm. If the wire is longer than
20m, it's recommended to use 25-35mm cable. Refer to local electrical codes for wire sizing.

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IM-S2-UX-EN-V1.4 17
NOTE: There is no need to connect N to AC side for the UX series three-phase inverter,
the ground wire can be connected to the grounding hole on the right side of the inverter
heat sink.
Cable specification Copper-cored
cable
Copper clad
aluminum /
Aluminum Alloy
cable
Traverse cross sectional area (mm2)
Range
16~35
25~35
Recommended
25
35
Cable outer diameter (mm)
Range
22~32
Recommended
27
NOTE: Prepare M6 OT terminals
The steps to assemble the AC grid terminals are listed as follows:
A) Strip the end of AC cable insulating jacket about 90mm then strip the end of each wire (as shown in figure
5.17).
Figure 5.17 Strip AC cable
NOTE: L2 (insulation stripping length) is 2mm-3mm longer than L1 (OT cable terminal
crimping area)
B) Strip the insulation of the wire core, insert into the cable crimping area of the OT terminal, then use a
hydraulic crimp tool to crimp it firmly. The wire must be covered with heat shrinkable tube or insulating tape.
When using the heat shrinkable tube sleeve the heat shrinkable tube over the wire before crimping the OT
terminal.
C) Remove the 4 screws on the AC terminal cover and remove the cover.
L2 L1

18 UX-series Inverters
D) Remove the screw under terminal slide and pull out the terminal.
E) Insert the cable through cap nut, water proof bushing and AC terminal cover into the AC terminal and use a
socket wrench to tight the screws. The torque is 4-6Nm (as shown in figure 5.20).
Figure 5.20b Connect cable to AC terminal

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IM-S2-UX-EN-V1.4 19
F) Push the AC terminals along the rail to the inside of the inverter then tighten the screws under rack. Tighten
the 4 screws of AC terminal cover and tighten the AC entry cap nut (as shown in figure 5.21).
NOTICE! It is important that the AC wires are connected to the right terminals as indicated by
the “L”, “N” and “Earthing” symbols on each AC connector.
In some countries a second protective conductor is required as a matter of principle. In each
case, observe the applicable regulations for the site.
The AC connection to the electrical distribution grid must be performed only after receiving
authorization from the utility that operates the grid.
Always use separate fuses for consumer load. Use dedicated circuit breakers with load switch functionality for
load switching.
DANGER! No consumer load should be applied between the mains circuit breaker and the
inverter.
5.3 Additional Protections
To protect the inverter's AC grid connection conductors, Autarco recommends installing breakers that will
protect against overcurrent. The following table defines OPCD ratings for each model;
Inverter
Rate Voltage (V)
Rated Output (kW)
OPCD: Current for
protection device (A)
S2.UX40000(S)
400V
40
80
S2.UX50000(S)
400V
50
100
S2.UX60000(S)
400V
60
100
S2.UX50000-HV(S)
480/500V
50
80
S2.UX60000-HV(S)
480/500V
60
80
S2.UX70000-HV(S)
540V
70
90

20 UX-series Inverters
The Autarco inverter is equipped with an integrated Residual Current Protective Device (RCPD) and Residual
Current Operated Monitor (RCOM). The RCOM will detect the leakage current and compare it with the expected
value, if the leakage current exceeds the permitted range, the RCPD will disconnect the inverter from the AC
load.
If regulations in the country of installation stipulate an external Residual Current Device (RCD), you must use a
device with a tripping threshold of 100 mA or more. A type “A” RCD can be used in accordance with our
“Manufacturer’s declaration for usage of residual current devices with Autarco SX, UX and LX grid-tied
inverters.”
5.4 DC connections
DANGER! Never connect or disconnect the connectors under load.
UX series inverters have four MPP trackers. The DC characteristics of each model is shown in the table below:
Inverter
MPP trackers
Max DC power
Max DC voltage
Max. DC current per MPPT
S2.UX40000(S)
4
48000W
1100V
22.0A
S2.UX50000(S)
60000W
28.5A
S2.UX60000(S)
72000W
S2.UX50000-HV (S)
60000W
22.0A
S2.UX60000-HV (S)
72000W
28.5A
S2.UX70000-HV(S)
84000W
DANGER! Do not connect the strings with an open circuit voltage greater than the Max DC
voltage of the inverter.
To connect the PV generator to the inverters we use 4mm² or 6mm² PV cable and MC4 connectors. For details
on how to assemble MC4 connector please refer our MC4 connector manual.
DANGER! For protection against electric shock, MC4 connectors must be isolated from the PV
array while being assembled or disassembled.