SolarMax SHT Series User manual

Instruction Manual
SolarMax SHT-series
50SHT / 60SHT

SolarMax Produktions GmbH
Zur Schönhalde 10
D-89352 Ellzee
E-Mail: [e-mail]
© SolarMax Produktions GmbH 2020

3
en
Inhalt
1 Notes on the manual � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �5
1.1 Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.2 Target groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.3 Where to keep this manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.4 Symbols used. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2 Safety � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �6
2.1 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.3 Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3 Description � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �8
3.1 Identication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3.2 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3.3 Front panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
3.4 Connections in the lower part. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Installation � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 12
4.1 Package contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2 Selecting the installation location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3 Mounting the inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5 Electrical Connection � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 16
5.1 Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.2 Connecting the inverter to the mains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.2.1 Integrated RCD and RCM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.2.2 Connection instructions for AC Output Cables . . . . . . . . . . . . . . . . . . . . 17
5.2.3 Connecting the inverter to the PV generator . . . . . . . . . . . . . . . . . . . . .20
5.3 Communication interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
6 Commissioning� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �24
7 Conguration � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �25
7.1 Installation of MaxLink App . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
7.2 Connecting the inverter via WLAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
7.3 Conguration of the inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
8 Troubleshooting � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �30
8.1 Troubleshooting measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
8.2 SolarMax Service Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
9 Technical Data � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �33
10 Disposal� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �34
11 Warranty � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �35

4

5
en
1 Notes on the manual
1�1 Scope
The scope of this manual is to provide detailed instructions about the installation, operation,
maintenance and troubleshooting procedures for the following SolarMax inverters:
50SHT / 60SHT
1�2 Target groups
This instruction manual is intended for the operator of the plant and the installer of the PV
power plant. Before any action is taken, the user must rst read the safety instructions to
protect himself from the hazards deriving from using devices operating at high voltages.
Electrical connection an installation may only be carried out by trained electricians (e.g.
electricians, electric systems technicians, electrical mechanics, and industrial electronics
technicians).
1�3 Where to keep this manual
The plant operator must ensure that this instruction manual is available to the relevant per-
sons at all times. If this original document is lost, an up-to-date version of this instruction
manual can be downloaded from our website at any time (www.solarmax.com).
1�4 Symbols used
The following safety instructions and general information are used within this instruction
manual.
DANGER!
Non-observance of these safety instructions results in serious injuries or death.
WARNING!
Non-observance of these safety instructions may result in serious injuries or death.
CAUTION!
Non-observance of these safety instructions may result in minor or extensive
injuries.
ATTENTION!
Non-observance of these safety instructions may result in material damage.
Note
Notes contain additional information or facilitate operation of the inverter.

6
2 Safety
2�1 Intended use
SolarMax HT series inverters are designed exclusively for the conversion of the direct current
generated by PV modules into alternating current which conforms to the parameters of the
public grid. Any other use is contrary to the intended use.
Inverters of the SHT series may only be used in combination with PV modules which comply
with the IEC 61730 standard. Inverters of the SHT series may only be connected to Class II
PV generators.
2�2 Safety instructions
DANGER!
Fatal electric shock hazard!
In daylight the PV generator supplies the inverter with a dangerously high DC
voltage.
■ Make sure that all electrical input conductors to the inverter are de-energized
before starting any work on the inverter or the input conductors.
DANGER!
Fatal electric shock hazard!
Components within the inverter are charged with a high voltage.
■ Never open the inverter while it is in operation.
WARNING!
Risk of injury from electric arc!
Removing the DC connectors when live can lead to dangerous electric arcs.
■ Switch off the DC disconnector at the inverter before removing the DC
connectors.
WARNING!
Fire hazard caused by inappropriate repair attempts!
■ The inverter does not contain any replaceable components. Defective inverters
must be returned to the SolarMax Service Center for repair or disposed of in
accordance with the instructions in this manual.
CAUTION!
The inverter can become very hot during operation�
■ Do not touch the heatsink and the side surfaces during or soon after the use.

7
en
2�3 Symbols
Symbol Description
Life threatening hazard due to high voltage. Only qualied personnel may
perform work on the inverter.
Attention: hot surfaces!
10 min
Life threatening hazard due to high voltage in the inverter! Disconnect the
voltage from the inverter. Wait 10 minutes before opening the inverter.
Warning!
Non-observance of the safety instruction may cause serious injuries.
Read and follow the operating instructions supplied with the inverter. Do
not remove any symbols on the inverter. Replace damaged symbols.
CE marking. The inverter complies with the requirements of the European
directives regarding the Electromagnetic compatibility and the electric
safety.
Do not dispose of the inverter and its accessory components in the house-
hold waste.
Removing
this label
voids the
warranty
Do not open the inverter and do not make modications or holes of any
type. In case these instructions are not observed, then SolarMax does not
assume any liabilities for damages to persons or properties.

8
3 Description
3�1 Identication
The inverter can be identied on the basis of the information provided on the nameplate. The
nameplate is on the right side of the inverter. The following image shows the nameplate of
the 60SHT model:
60SHT
Item No�: 10260200
Serial No�: 1935-385823xxx
Input DC
Max.input voltage 1100 V
MPPT range 540 … 800 V
Max. input current 33A/33A
Max. short-circuit curr. 42A/42A
Output AC
Nominal power 60000 W
Maximum power 66000 VA
Power factor 0.8i - 0.8c
Voltage 400 V
Frequency 50 Hz
Max.current 3 x 92A
Protecton class I
Overvoltage category II
IP rating IP65
Ambient temperature – 25 … + 60°C
SolarMax Produktions GmbH
Zur Schönhalde 10 - 89352 Ellzee - Germany
www.solarmax.com
Fig. 1: Label of SolarMax 60SHT
3�2 Function
The SolarMax SHT Series inverters have the following characteristics that provide high ef-
ciency and high reliability:
■ Wide input DC range, allowing maximum exibility in the conguration of the PV
generator.
■ Wide Maximum Power Point (MPP) tracking operating interval, ensuring high energy har-
vesting even in sub-optimal weather conditions.
■ The high MPP accuracy and the high efciency of the power electronic circuits minimize
the operating losses.
■ Quad MPP tracker for optimum energy yield
■ Protection class IP65, suitable for outdoor use

9
en
Additionally, in the SHT Series inverters integrate the following protection devices:
■ Internal overvoltage
■ DC insulation monitoring
■ Ground fault protection
■ Grid monitoring
■ Current leakage protection
■ DC current monitoring protection
■ DC disconnector integrated
■ Reverse DC polarity protection
3�3 Front panel
LED indicators
124
3
Fig. 2: Status indicators on the front panel of the SHT inverters
The following table shows the status of the LED indicators in case of a warning/alarm:
Warning/Alarm Alarm
Code
PV
indicator
Grid
indicator
Comm�
indicator
Warning
indicator
Normal status


 
Startup phase

Communication active
 


PV normal
   
Grid over voltage A0


 
Grid under voltage A1
No grid A2
Grid over frequency A3
Grid under frequency A4
Grid unbalanced A6

10
Warning/Alarm Alarm
Code
PV
indicator
Grid
indicator
Comm�
indicator
Warning
indicator
PV over voltage B0

  
PV under voltage B4
Weak irradiance B5
PV strings abnormal B3


Inverter overtemperature C5
Internal fan abnormal C8
Insulation resistance
abnormal
B1

Leakage current abnormal B2

PV polarity reversed B7

Control power abnormal C0


 
DC bias current abnormal C2




Inverter relay abnormal C3

Leakage current HCT abnormal C6

System fault C7


DC link voltage unbalance C9

DC link over voltage CA
 


Internal communication fault CB
 


Software version
incompatibility
CC


EEPROM fault CD


Sampling inconsistency CE


Inverter circuit abnormal CF

Boost circuit abnormal CG


Legende:

LED ON

LED OFF

LED Blink

keep original status

11
en
3�4 Connections in the lower part
Fig. 3: Connections in the lower part
Position Description
1 DC Isolation switch
2 PV Strings terminal
3Communication interface
4RS485 interface
5AC output terminal
6Fan
7 Vent valve

12
4 Installation
CAUTION!
The inverter is a heavy device!
■ To prevent personal injury or device damage, arange two people to move the
inverter and handle with care.
4�1 Package contents
When the inverter is delivered check and report any damage on the box that may affect its
contents. Verify the presence of all the parts listed below and that the inverter does not show
any visible damage. Contact immediately the dealer in case of any parts missing or damaged.
G
Fig. 4: Scope of delivery of SHT inverters
Part Quantity Description
A 1 Inverter
B 2 DC connector
C 1 Terminal block waterproof cover
D 1 Mounting bracket
E 3 pairs Screws and dowels
F 1 M6 screw
G 1 This manual
H 1 PV connector unplugging tool

13
en
4�2 Selecting the installation location
DANGER!
Fatal fire or explosion hazard!
The inverter is an electrical device with heat generation and the possibility of
sparking.
■ Install the inverter in an environment that is free of ammable gases and uids
■ Never install the inverter near combustible materials. The installation base
must be non-combustible.
■ Follow the local fire safety regulations.
Select the installation site according to the following indications:
■ The inverter is protected to IP65 and can be installed indoors or outdoors. Select a dry
location protected from water and snow
■ Install the inverter in an easily accessible location, so that the maintenance work can be
carried out easily
■ Do not install the inverter in a place where personnel are likely to come into contact with
its enclosure and heat sinks because these parts are extremely hot during operation.
■ Do not expose the inverter to direct sunlight
■ Never install one inverter above another (this would reduce the cooling effect)
■ The environmental temperature in the installation site must be between -25°C and +45°C
■ Make sure there is a good air circulation. An insufcient air circulation may reduce the
performance and the lifetime of the components inside the inverter.
■ Maintain the following minimum installation distances:
40 cm
60 cm
60 cm
40 cm
Fig. 5: Minimum installation distances of SHT inverters

14
■ Install the inverter in vertical position with maximum backward inclination of15°.
≤ 15°
OK OK (max. 15°) No No No
Fig. 6: Mounting position of the SHT inverter
■ Make sure the installation base is robust enough to sustain the weight of the inverter.

15
en
4�3 Mounting the inverter
NOTE
The SHT series inverters should be mounted on a mounting system or substruc-
ture. A mounting system is not included. All commercially available mounting sys-
tems are suitable which guarantee permissible mounting.
The inverter is attached to the wall or to a mounting system using a mounting plate. The
mounting plate and the mounting material are included in the scope of delivery. The following
installation instructions apply to wall mounting of the inverter
1. Mark the three drilling holes on the wall using the mounting bracket provided with the inverter.
640
400
419 7.
192 5.
Fig. 7: Mounting the mounting bracket
2. Drill the holes. Insert the dowels, position the bracket and insert the screws to lock it.
Alternatively, you can x the supplied mounting plate of the inverter to a mounting system
with the corresponding screws.
3. Mount the inverter on the monting bracket and tighten the inverter with rear panel using
screws as shown in the following gure:
Anti-theft lock is recommended
to be installed here
Fig. 8: Thigtening the inverter
4. Ensure that the three supporting points on the rear side of the inverter align with the three
hole of the mointing bracket.
5. Ensure that the inverter is well xed and that the inverter is locked on the support and an
antitheft lock is installed.

16
5 Electrical Connection
5�1 Safety
DANGER!
Fatal electric shock hazard!
In daylight the PV generator supplies the inverter with a dangerously high DC
voltage.
■ Respect all the valid national standards and regulations concerning safety and
prevention.
■ This inverter will be connected directly to a high voltage photovoltaic gener-
ator. The installation must be carried out by qualified personnel observing the
local and national standards and regulations.
■ The PV generator voltages are very high. NEVER plug or unplug the DC con-
nectors when the inverter is turned on, otherwise dangerous electric arcs
could develop.
NOTE
Follow the applicable standards and regulations to implement the electrical con-
nections, in particular for the section of the conductors, the fuses, and the Protec-
tive Earth (PE) connection.
5�2 Connecting the inverter to the mains
5�2�1 Integrated RCD and RCM
The SHT Series inverters are equipped with integrated RCD (Residual Current Device) and
RCM (Residual Current Monitor) according to VDE 0126-1-1. The sensor measures the residual
current and compares it to the pre-set value, disconnecting automatically the inverter from the
AC grid by means of the integrated RCD in case the value exceeds it.
If you add an external RCD breaker you can use a type A device with at least 100mA rated fault
current (300mA in case of PV plants with large leakage capacities).

17
en
5�2�2 Connection instructions for AC Output Cables
ATTENTION!
An independent three-phase circuit breaker must be installed on the AC side of
each inverter. Do not install one circuit breaker for multiple inverters!
ATTENTION!
Install a model B leakage curren protection switch with no less than 600 mA
current. Do not share neutral wire when B leakage current protection switch is
installed or else a power grid trip may occur.
AC output cables requirements
For AC power cables outdoor multi copper-cores cables are recommended. For the specica-
tion of these cables see the following table:
Terminal Kabeltyp
Cross-sectional
area (mm2)
Range
Recommended
OT terminals Notes
AC terminal
5-core outdoor
special cable
30 … 50 OT35 ... 50-8
The distance bet-
ween ACterminal
and grid-connec-
tion is no more
than 200m
4-core outdoor
special cable
Protection Ground
(PE)
multi-core outdoor
special cable 30 … 50 OT35 ... 50-8 Terminal
connection
Connection of Protection Ground (PGND) Cables
1. Remove the external isolation of the cable to free wires for a length of 120 mm. Remove
the isolation of the individual wires for the length of the OT terminal as shown in the gure
below.
L1
OT35-50-6
L2 = L1+2 mm
Fig. 9: Removing the isolation of the AC cable
2. Insert the exposed core wires into the crimp area of the OT terminal and crimp them using
hydraulic pliers.
3. Remove the grond screws from the ground points, secure the PE cable using the ground
bolts and tighten the bolts (torque 3 Nm) as shown in the following gure.

18
Fig. 10: Securing the PE cable
NOTE
The PE wire must be well grounded to ensure that impedance between Neutral and
Earth wire be less than 10 Ω.
Connection of AC Output Cable
In the lower part of the front of the inverter there is an covered AC wiring area.
1. Remove the screws and the cover of the covered AC wiring area:
AC wiring area
Fig. 11: Removing the cover of the AC wiring area
2. Remove an appropriate length of the jacket and insulation layer from the AC output cable.
3. Insert the exposed core wires into the crimp area of the OT terminal, wrap the wire crimp
area with heat shrink tubing or insulation tape and crimp them using hydraulic pliers.

19
en
heat shrink tubing
Fig. 12: Connecting the OT terminals to the AC cable
4. Loosen the locking cap from the AC output waterproof cable connector at the bottom of
the inverter and remove the plug from the locking cap.
5. Route the AC output power cable into the locking cap and the AC output connector at the
inverter bottom and connect the AC cable to L1, L2, L3, N and PE on the AC terminal block,
tighten them using screws driver (torque 12 Nm).
Fig. 13: Connecting AC Cables
6. Thighten the locking cap on the AC output waterproof cable connector (torque 12Nm).
7. Replace the cover of the AC wiring area and tighten the according four screws on the
cover (torque 3 Nm).
ATTENTION!
For operation convince and safety the inverter requires multi-stranded wire
and crimping terminals with proper crimping tool before wiring. To avoid
potential risk a overcurrent protection device (125 A / 400 VAC) is recom-
mended to add on the output terminal.

20
5�2�3 Connecting the inverter to the PV generator
DANGER!
Fatal electric shock hazard!
In daylight the PV generator supplies the inverter with a dangerously high DC
voltage.
■ The PV generator voltages are very high. NEVER plug or unplug the DC con-
nectors when the inverter is turned on, otherwise dangerous electric arcs
could develop.
10 mi
n
DANGER!
Fatal electric shock hazard!
Components within the inverter are charged with a high voltage.
■ Before attempting any action on the DC connections, make sure
that the DC switch is switched off
■ Wait 10 minutes to rule out any residual risks
■ Do not connect either PV generator pole to ground. Make sure that
positive and negative poles are free floating to earth potential.
PV input assignment
One or more cable pairs arrive from the PV system for connection to the inverter. The following
table describes possible pin assignments:
Fig. 14: Route connection for the installation of PV strings
Number of
cable pairs Number of input route Inverter type
1 All All types
2 PV1 and PV4 All types
3 PV1, PV4 and PV7 All types
4 PV1, PV4 and PV7, PV10 All types
5 PV1, PV2, PV4, PV7 and PV10 All types
6 PV1, PV2, PV4, PV5, PV7 and PV10 All types
7 PV1, PV2, PV4, PV5, PV7, PV8 and PV10 All types