Siemens SITOP solar User manual

General
The reproduction, transmission or use of this document or its contents
is not permitted without express written permission. Offenders will be
liable for damages. All rights, including rights created by patent grant or
registration of a utility model or design, are reserved.
Although we have checked this document for correspondence to the
hardware and software described, differences may still exist and we do
not guarantee full correspondence. The information in this publication is
checked at regular intervals and any necessary corrections included in
subsequent editions. Your ideas and suggestions are welcome.
SITOP solar ® is a brand name of Siemens AG.
© Siemens AG 2006 All rights reserved

Siemens AG C98130-A7580-A1-1-7619 Page 3 of 34
SITOP solar 08/2006
1Foreword ............................................................................................................................................... 4
2Warnings ............................................................................................................................................... 5
2.1 CAUTION..................................................................................................................................... 7
3Device Description................................................................................................................................ 8
3.1 Basic Information on the Device .................................................................................................. 9
3.2 Physical Layout .......................................................................................................................... 10
3.3 How the Devices Work................................................................................................................ 10
4Mounting ............................................................................................................................................. 11
4.1 Potential Danger from Alternating and Direct Current............................................................. 11
4.2 Physical Mounting...................................................................................................................... 12
4.3 Electrical Connection................................................................................................................. 13
4.3.1 Electrical Connection between MASTER and SLAVE Devices ........................................... 13
4.3.2 Connection of the Solar Generator (Applies to MASTER and SLAVES)............................. 13
4.3.3 Connection of the Power Line................................................................................................ 14
4.3.4 Connection of the Sensors...................................................................................................... 15
4.3.5 Connection of a digital counter.............................................................................................. 16
4.4 Commissioning ........................................................................................................................... 16
4.5 Country-Specific Power Monitoring........................................................................................... 17
4.6 Service Work/Disassembly of the Inverter.................................................................................. 17
4.6.1 Replacing the Lithium Battery............................................................................................... 18
5Reactions of the Inverter.................................................................................................................... 18
5.1 Switch-On Procedure.................................................................................................................. 18
5.2 Normal Operation....................................................................................................................... 19
5.3 Operation at Excessively High Ambient Temperatures.............................................................. 19
5.4 Reaction to Too High/Too Low Temperature............................................................................. 19
5.5 Reaction to Excess Availability of Power................................................................................... 19
5.6 Parallel Connection of Several Inverters ................................................................................... 19
5.7 Night and Remote Switch-On......................................................................................................20
6Operator Panel and Display............................................................................................................... 20
6.1 Operational Indicators ............................................................................................................... 20
6.2 Fault Messages........................................................................................................................... 23
6.3 Activation and Deactivation of the Running Light ..................................................................... 26
7SITOP solar log Evaluation Software................................................................................................ 27
8Block Circuit Diagrams...................................................................................................................... 28
8.1 Block circuit diagram 1500 MASTER with 2 x 1500 SLAVEs.................................................... 28
8.2 Block circuit diagram 1500, 2000 or 2300 MASTER
Æ 1500 , 2000 or 2300 SLAVE.............. 29
9Technical Data .................................................................................................................................... 30
10 Warranty............................................................................................................................................. 33
TABLE OF CONTENTS

Siemens AG C98130-A7580-A1-1-7619 Page 4 of 34
SITOP solar 08/2006
1 Foreword
Dear Customer,
Thank you for buying an inverter from the SITOP solar family.
We hope that the device will meet with your complete satisfaction when you use it
with your solar system. Many years of experience and our know-how have gone into
the development of these devices. However, it should be mentioned that an inverter
is a complex electronic system which is also confronted with a wide variety of local
conditions. If questions arise or a malfunction occurs, do not hesitate to call your
specialized dealer. He or she will try to help you as quickly and straightforwardly as
possible.
Please read this user's guide carefully to familiarize yourself with the device. The
German version of the user’s guide is applicable in cases of doubt.

Siemens AG C98130-A7580-A1-1-7619 Page 5 of 34
SITOP solar 08/2006
2 Warnings
WARNING
When this device is in operation, certain parts must carry hazardous voltage and dangerous
rotating machine parts (i.e., fans).
Non-adherence to the instructions in this user's guide may cause death, severe injury and
property damage.
Only qualified personnel who are familiar with all the safety information in this user's guide and
instructions on installation, operation and maintenance should work on this device.
Correct and safe operation of this device is dependent on correct transportation, storage,
installation and mounting as well as careful operation and maintenance.
Subject to change without prior notice. The German text applies in cases of doubt.
Definitions:
•QUALIFIED PERSONNEL
For the purposes of this user's guide and the warnings on the product itself, qualified
personnel are those persons who are familiar with installation, mounting, commissioning
and operation of the product and who are appropriately qualified for their job. This
includes:
1. Training/instruction or authorization in turning on and off, grounding and tagging
current circuits/devices in accordance with safety standards.
2. Training/instruction in the standards of safety technology in the care and use of
suitable safety equipment.
3. Training in First Aid
•DANGER
Means that death, severe injury or substantial property damage will occur if proper
precautions are not taken.
•WARNING
Means that death, severe injury or substantial property damage may occur if proper
precautions are not taken.
•CAUTION
When accompanied by a warning triangle, means that minor injury may occur if proper
precautions are not taken.
•CAUTION
When not accompanied by a warning triangle, means that property damage may occur if
proper precautions are not taken.
•ATTENTION
Means that an undesired result or state may occur if the instructions are not adhered to.

Siemens AG C98130-A7580-A1-1-7619 Page 6 of 34
SITOP solar 08/2006
NOTE
For clarity's sake, this user's guide cannot contain complete, detailed information on all types of the
product and can also not cover every conceivable situation concerning installation, operation or
maintenance.
If you need additional information or special problems occur which are not covered in sufficient detail in
the user's guide, you can request the necessary information from your specialized dealer.
In addition, we would like to point out that the contents of this user's guide are not part of a previous or
existing agreement, promise or a legal relationship and are not intended to modify same. All obligations
on the part of Siemens are based on the purchasing contract which also contains the complete and solely
valid terms of warranty. These contractual warranty terms are neither extended nor restricted by the
statements in this user's guide.
DANGER
When this device is in operation, certain parts must carry hazardous voltage which may cause
severe injury or death. To reduce danger of death or injury, the following precautions must be
adhered to.
1. Only qualified personnel who are familiar with this device and the information accompanying
it may be allowed to mount, operate, trouble-shoot, correct or repair this device.
2. Mounting of the device must be in accordance with the safety regulations (e.g., DIN, VDE)
and all other relevant national or local regulations. Correct grounding, conductor dimensions
and short circuit protection must be provided to ensure operational safety.
3. During normal operation, all covers must be keep closed.
4. Before performance of visual checks and maintenance work, make sure that the power
supply is off and located. When measurements must be made while the power supply is on,
never touch the electrical connection points. Remove all jewelry from wrists and fingers.
Make sure that the test equipment is in good condition and safe to operate.
5. Stand on an insulated surface when working on the running device (i.e., ensure that there is
no grounding).
6. The instructions in this manual must be precisely followed and all information on danger,
warnings and precautions must be adhered to.
7. This list does not contain all meausres pertinent to the safe operation of the device. If
special problems arise which are not described in sufficient detail for the purposes of the
buyer, contact your specialized dealer or technician.

Siemens AG C98130-A7580-A1-1-7619 Page 7 of 34
SITOP solar 08/2006
2.1 CAUTION
Electrostatically Sensitive Devices (ESD)
This device contains electrostatically sensitive components. These components can be easily destroyed
with incorrect handling. If you have to handle electronic modules, adhere to the following notes.
•Electronic modules should only be touched when necessary work makes this unavoidable.
•When modules still have to be touched, discharge your own body immediately beforehand. We
recommend touching a grounded, conductive object (e.g., wall socket protective contact).
•Modules may not come in contact with highly insulating materials (e.g., plastic foil, insulating table tops,
artificial fiber clothing).
•Modules may only be placed on conductive surfaces.
•When soldering modules, the soldering iron tip must be grounded.
•Modules and components may only be stored or shipped in conductive packaging (e.g., metalized
plastic boxes or metal cans).
•If packaging is not conductive, modules must be wrapped in conductive material before being
packaged. This can be conductive foam rubber or household aluminum wrap, for example.
The necessary ESD protective measures are shown again in the following figure.
a = Conductive floor d = ESD coat
b = ESD table e = ESD bracelet
c = ESD shoes f = Grounding connection of the cabinets
a
b
e
d
f f f
d
a
c
e
d
f f
b
c
a
Seated Standing Standing/seated

Siemens AG C98130-A7580-A1-1-7619 Page 8 of 34
SITOP solar 08/2006
3 Device Description
1 power switch 2 menu bottom 3 display 4 connection area
SLAVE (optional) MASTER
Figure 1: View of front
5) data cable slave 7) Modular jack for data cable slave right
6) Modular jack for data cable slave left 8) RS232 interface
SLAVE (optional) MASTER
Figure 2: Connection areas
Terminal marking from left to right
2
1
3
4
5
768
DC Master
Possible
connections + - L N PE
rigid 1.5 – 6 mm²
flexible 1.5 – 4 mm²
Slave
left DC AC Sensors Slave right
7 8 9
4 5 6
Possible
connections LNP
E+- LNP E 1 2 3 LNP E
rigid 1.5 – 4
mm² 1.5 – 6 mm² 0.2 – 1.5 mm² 1.5 – 4 mm²
flexible 1.5 – 2,5
mm² 1.5 – 4 mm² 0.2 – 1 mm² 1.5 – 2.5 mm²

Siemens AG C98130-A7580-A1-1-7619 Page 9 of 34
SITOP solar 08/2006
3.1 Basic Information on the Device
PV systems can be implemented with an AC power of up to 4.6 kW when you
combine different inverter. The following table gives information about the possible
combination.
1. optional
devices 2. optional devices 3. optional devices
1100 Master
1500 Master 1 x 1500 Slave 2 x 1500 Slave
2000 Master 1 x 1500 Slave 1 x 2000 Slave
2300 Master 1 x 1500 Slave 1 x 2000 Slave 1 x 2300 Slave
Systems with 3.8 kW can be implemented by combining a SITOP solar 2300
MASTER with a SITOP solar 1500 SLAVE.
The primary differences between a MASTER and the SLAVES are the power
monitoring unit integrated in the device (ENS in accordance with DIN VDE0126-1-1)
and a powerful microprocessor system for operation and control of the indicators.
The system also offers the following features.
•Own MPP tracker on the MASTER and every SLAVE for separate operation of PV
generators (strings). This is a particular advantage when the subgenerators are
designed differently or when different module types are used.
•Wide input voltage range for optimum flexibility when planning systems and
selecting modules
•Low weight due to transformerless technology and active ventilation
•Standard integration of isolation monitoring of the solar generator
•Integrated all-current-sensitive, fault current circuit breaker (FI)
•Backlit display with 16 characters for indicating relevant measured values
•Serial RS 232 interface for easy connection of a PC or, if desired, a modem for
remote polling
The device has galvanic isolation and meets the requirements for secure
electrical isolation in accordance with EN 50178.
•Powerful integrated data logger for 8 measured values
The logger can be read with the free evaluation software SITOP solar log.
•Possible connections for sensors for measuring the emission and the module
temperature (ET100 or equivalent)
In addition, the impulse output (S0 output) of a digital counter can be connected
for AC power acquisition.

Siemens AG C98130-A7580-A1-1-7619 Page 10 of 34
SITOP solar 08/2006
3.2 Physical Layout
Except for the display unit of the MASTER, the safety isolated plastic housing is
identical for both MASTER and SLAVE. One SLAVE can be mounted on each side of
the MASTER. The devices are easy to install on a wall (see chapter 4.2). The
modular design and low weight make it easy for one person to do the job.
The removable terminal cover allows simple connection of the necessary installation
lines.
3.3 How the Devices Work
Operation of the devices is always fully automatic.
The inverters convert the DC power from the solar generator into 230 V alternating
current for use. This is achieved with an innovative switching technology with which
the neutral conductor of the building power network is directly connected to the minus
pole of the solar generator. The advantage over other transformerless switching
technologies is the prevention of capacitive leakage currents and electrical 50 Hz
alternating fields on the solar generator.
The voltage provided by the solar generator in the morning activates the
microprocessor of the MASTER when a certain threshold value is reached. This now
takes control over operation and the display becomes active. In particular, the
integrated data logger which provides a review of past reactions of the entire system
is managed.
When the input voltage exceeds a value stored the night before, the power network is
checked and, if running correctly, a switch is made to the power network.
During operation each MASTER and each SLAVE has its own MPP tracker so that
up to three different module fields are possible within a system even when they have
different working voltages.
The digital data supplied to the main processor by the SLAVES and the power pack
of the MASTER are shown on the display. The data on the display can be scrolled
with the button.
Using the integrated interface, the data can also be presented online with a PC and
the SITOP solar log software or, after the data logger is read out, stored for further
processing later.
For information at a quick glance, the device offers a bar whose progress varies with
the current incoming power. Similar to the running wheel of a conventional
mechanical counter, this running light shows you at a glance whether the inverter is
providing power to the system. In addition, the user obtains a statement as to the
amount of solar power being generated.
To cool the device, a fan is turned on when the heat dissipater temperature reaches
a certain value. The fan is controlled continuously via the temperature.
When the sun sets and it becomes dark, the MASTER uses the power offered by the
solar generator to determine the value at which the consumption of the system is
about that of the power from the solar modules. The related voltage value of the solar
field is stored and controls the switch on again the next morning. After the switch off
procedure, the described cycle begins again the next morning.

Siemens AG C98130-A7580-A1-1-7619 Page 11 of 34
SITOP solar 08/2006
Integrated safety
The ENS (device for power monitoring with all-pole switches in series) integrated on
the MASTER ensures the necessary safety against undesired "island power." The
ENS continuously checks the network for correct voltage, frequency and impedance
ratios. When illegal values are determined, a disconnection from the network is
initiated. At the same time, this information is forwarded to the microprocessor and is
also sent as plain text to the display.
When several MASTERS are connected in parallel on one system, make sure that
the devices feed in power over different phases so that they do not interfere with
each other. In addition, adhere to DIN VDE 0126 which requires that incoming power
of more than 4.6 kW be distributed over several phases.
Another important part of the ENS is an all-current-sensitive FI circuit breaker which
ensures fast disconnection from the 230 V building power network when leakage
currents greater than 30 mA occur.
To be able to detect a defect in the installation or on the modules early, an isolation
check of the solar generator is performed each time a device is connected to the
public power network.
4 Mounting
Touchable voltage carrying parts can already
be accessed in the terminal area.
4.1 Potential Danger from Alternating and Direct Current
As with all electrical systems, touching current-carrying parts is dangerous and can
even be fatal. This device contains direct current up to 675 V as well as the power
network alternating current of 230 V.
Before opening the device, turn off the inverter on the
front of its housing. Be absolutely sure to disconnect on both the
direct and alternating current sides.
Even after disconnection from the power, hazardous voltage
is still present in the device caused by a residual
charge in the internal capacitors (see chapter 4.6)!
Caution! The components of this device carry voltage. Unintentional touching of live
components in the device, incorrect installation, handling or repair of the device may
cause severe injury and substantial property damage.
Only appropriately qualified persons may work on this device. These persons must
be familiar with all warnings and the measures described in this user's guide for
installation and operation of the device or apply to today's state of technology.
Please check all connections carefully after initial installation.
Make sure that there are no flammable materials in the vicinity of the devices.
Remember that the inverter which you install will probably spend decades at the
location which you select.

Siemens AG C98130-A7580-A1-1-7619 Page 12 of 34
SITOP solar 08/2006
4.2 Physical Mounting
To mount MASTER or SLAVE, select a location and provide a bored hole with screw
in the middle of the wall for each device. Now hang the devices on the tabs there.
The holes to the left and right in the terminal area can be used as a drilling jig for the
two other screw attachments.
Any SLAVES can be installed directly next to the MASTER.
Ensure that the max. distance between MASTER and SLAVE is not longer than the
length of the data cable in the SLAVE.
Be sure to consider the following points when selecting the installation location.
•Do not install in rooms where extremely high temperatures occur and care for
enough ventilation because of the waste heat. High ambient temperatures reduce
the power output. (see chapter 5.4)
•This would probably shorten the life expectancy of the device. See technical data.
•Do not install in areas where condensation can occur.
•Do not mount on flammable bases (e.g., wood or fiberboard).
•Objects which may catch fire do not belong in the vicinity of the device. Allow at
least 1 m distance.
•Leave approx. 50 cm of free space above and below the devices so that air can
circulate freely.
Dimensions in mm Figure 3: Mounting drawing
88
176
139
430
18,3
11,8
min. 500
min. 500
tab for attachment
holes for attachment screws
*
**

Siemens AG C98130-A7580-A1-1-7619 Page 13 of 34
SITOP solar 08/2006
4.3 Electrical Connection
After the device(s) has/have been mounted correctly on the wall, the electrical
connection can be made.
4.3.1 Electrical Connection between MASTER and SLAVE Devices
This point can be omitted if you are only using a MASTER.
First, disconnect the screws of the covering plate of the connection area on the front
of both housings and remove the cover.
For simple installation, disconnect the screws of the pull relief devices under the
terminals and remove the terminal holders.
Run the data cable in the connection area of the SLAVE to the connection area of the
MASTER and connect it there with a Western plug. A choice of right or left slave is
available.
Then run a three-core AC line from the SLAVE to the MASTER. Be sure to use the
same side (left or right) on the MASTER as for the data cable.
The right or left BUS slave has no galvanic isolation.
Never connect the right or left BUS slave to the public Telecom
network.
Never under any conditions connect a SLAVE directly to the public
power network.
Wiring must always be made via a MASTER.
A possible second SLAVE is connected in the same way to the other side of the
MASTER.
4.3.2 Connection of the Solar Generator (Applies to MASTER and SLAVES)
The solar generator must be dimensioned so that
the maximum input voltage of the device cannot under any
circumstances be exceeded.
Check the connection values of the generator and the device.
Remember that the no-load voltage of the solar field increases during cold weather!
Caution: See the nameplate for the maximum permissible input voltage.
Check to make sure that the solar generator does not under any circumstances
exceed the permissible input voltage range of the device.
Electrolyte capacitors like the ones used in your inverter can be destroyed by
explosion when overvoltage is continuous.
Before connecting the PV generator or the building power network, the device must
be turned off with the power switch on the front plate. To install the direct current and
alternating current line, disconnect the screws of the covering plate of the connection
area on the front of the device and remove the cover.
Before connection, disconnect all lines from the power.

Siemens AG C98130-A7580-A1-1-7619 Page 14 of 34
SITOP solar 08/2006
For simple installation, disconnect the screws of the pull relief devices under the
terminals and remove the terminal holders.
First, connect the plus line of the solar generator to the appropriately marked
terminal. Then repeat the procedure for the minus line. Make sure that the cables are
long enough so that the terminal holders of the pull relief can be secured to the
device again after installation.
The DC inputs of the MASTER and SLAVES may not be connected in parallel. Each
device requires its own string.
Make sure that the isolating switch in the generator connection box is turned off
before the cables are connected. Otherwise the input terminals may be damaged by
possible arcing.
Be sure not to reverse the poles of the connections, since a connection whose poles
are reversed will probably cause electrical arching when disconnected again, and this
may damage the terminals.
Once ignited a direct current electrical arc never goes out by itself
in contrast to alternating current. This may cause a fire.
If measurements are to be performed during commissioning, only connect/disconnect
measuring instruments when the device is off. Otherwise the electronics may be
damaged.
Never touch the plus pole or the minus pole, not to mention both
poles together! Direct current generated by solar energy can also
be hazardous and cause injury!
Now carefully screw the terminal holders to any SLAVES to ensure good physical pull
relief.
4.3.3 Connection of the Power Line
Before connection to the power line, disconnect the power by removing the power
fuse and providing suitable measures to prevent it from being connected again.
Then run the three-core alternating current cable through the breakthrough in the
connection cover of the MASTER and connect it to the appropriately marked
terminals. Make the PE connection somewhat longer than the other lines so that PE
will be disconnected last in case the power line is accidentally pulled out.
Carefully screw down the terminal holders on the MASTER to ensure good physical
pull relief.
The incoming power line must be equipped with a suitable circuit
breaker with triggering characteristic B.
The current depends on the version.
2.3, 2.0 and 1.5 Master 16 A
1.1 Master 10 A
Arrangements with Slaves 25 A independent of version.

Siemens AG C98130-A7580-A1-1-7619 Page 15 of 34
SITOP solar 08/2006
FreeFree
Solar
radiation
S0S0
Temperature
sensor
FreeGND5V
987654321
Connection area of MASTER
COM COM
SLAVE left SLAVE right
DC AC
Sensors
BUS BUS
9
123
456
78
Sensor terminal
4.3.4 Connection of the Sensors
Terminal allocation
ET 100 solar radiation sensor
The ET 100 was developed especially to measure the
solar radiation strength as well as to record the module
temperature of photovoltaic systems. Measurement of
the radiation is performed with a temperature-compensated
silicium cell in pseudo short-circuit. The module
temperature is determined with a temperature sensor
laminated to the back of the sensor.
Technical data
Meas. signal, solar radiation 1V / [kW / m2]
Meas. signal, module temperature U = 1.235 V + [10 mV / °C]
Power supply +5 V
Current consumption 150 µA
Fault solar radiation (100 - 1000 W/m2) +/- 5% of meas. value (max.)
Fault module temperature (-20 °C to 100 °C) +/- 2 °C (max.)
Physical dimensions (W x H x D) 100 mm x 75 mm x 40 mm
Required meas. signal line 4-core / shield
Solar cell size 50 mm x 50 mm
This procedure produces the following measuring accuracy.
1. The radiation measurement is calibrated via a "tilt & zone" CM11 pyranometer
at a minimum of 800 W/m2. Due to the different spectral sensitivity, an error
varying with the radiation conditions occurs.
2. The sensor surface (5 x 5 cm2) is smaller in relation to the frame than a solar
module. The back is encapsulated to withstand weather conditions.

Siemens AG C98130-A7580-A1-1-7619 Page 16 of 34
SITOP solar 08/2006
Installation guidelines for the ET 100
•Mount the radiation sensor directly on the PV generator with the same alignment
and angle of inclination.
•Allocation of the connection cable:
Brown: Measuring signal, temperature sensor (10 mV / °C)
Orange: Measuring signal, solar radiation (1 V / [1000 W / m2])
Red: Plus voltage (5 V)
Black: Ground (GND)
•As connection cable to the inverter, use a 4-core, color-coded and shielded signal
cable with an approx. 0. 2 mm2copper cross section depending on the cable
length (under 30 m = 0.15 mm2, over 30 m = 0.25 mm2). To prevent interference,
do not install the signal cable parallel to the power cables.
•Connect the cable directly to the inverter in accordance with the terminal
allocation.
4.3.5 Connection of a digital counter
The impulse output of a digital counter is connected to the AC power acquisition on
the "S0" terminals. This must be activated via the "SITOP Service Module" software.
The values actually measured by the counter are not indicated on the inverter until
then. The impulse constant of the current counter can be set with this software within
a range from 256 to 10,000 impulse/kWh.
4.4 Commissioning
The devices have been checked at the plant and calibrated so that commissioning
can be performed immediately after installation.
Proceed as shown below.
Do not turn on the device yet!
•Check screwed glands on the inverters for tightness. Check poles!
•Check all screws of the connection terminals on the installation system and on the
inverters for tightness.
•Check polarity of the solar generator (+ and -) and then connect the generator.
•Check voltage of the solar generator!
•Connect power and check.
•If necessary, check voltage between L1 and N.
•Secure cover plate of the connection area with screws.
Never work on the opened device during operation!
The power switch on the front of the master is switched to "ON." When the power
voltage and the voltage of the solar generator are correct, the device performs a self-
test, checks the mains quality (from approx. 30 seconds to 20 minutes) and connects
automatically to the power.

Siemens AG C98130-A7580-A1-1-7619 Page 17 of 34
SITOP solar 08/2006
4.5 Country-Specific Power Monitoring
The factory setup of the devices is as follows:
After startup for the first time the German ENS set and German display language will
automatically be accepted. In this case do not press the menu bottom for the first 5
second.
If you want to use the SITOP solar in a country other than Germany, you can
select too the Power Monitoring from Austria, Switzerland, Italy and Spain.
Keep the menu bottom pressed when you turn on the device for the first time
so long that you access the Setup menu. Press the bottom several times to
choose between the countries and then keep the bottom pressed for approx. 5
seconds to accept your selection.
After the country is selected, the country's abbreviation appears permanently on the
display in standby (e.g., "Sitop solar A" for Austria). This can always tell you which
country-specific power monitoring is being used by the inverter.
For operation in Italy the “max. allowable frequency drift” of mains frequency can be
adjusted. You need therefore the „Parametrierungssoftware“, contact your
professional dealer.
4.6 Service Work/Disassembly of the Inverter
Remember that work on the device may only be performed by electro-technically
qualified personnel. It is imperative to adhere to the applicable safety measures!
Devices may only be repaired by authorized service providers.
If service work needs to be performed on the device, proceed in the order shown
below to disassemble the device.
•Turn off device with power switch.
•Disconnect the power fuses of the incoming power lines to the device and ensure
that the fuses cannot be connected again.
•Turn off DC circuit breaker of the solar generator for MASTER and SLAVE
devices. Disconnect AC connection of the MASTER and protect against
accidental reconnection.
•Disconnect covering plate of the connection area for all MASTER and SLAVE
devices. Disconnect the lines and isolate.
•Disconnect mounting screws in the terminal area. The device can now be lifted
from the wall.
VWARNING
Remember that the electrolyte capacitors in the device will not be sufficiently
discharged until several hours later after disassembly. Before this time they still
contain hazardously high voltage on the DC connection terminals. The waiting period
can be reduced to 10 seconds by short-circuiting the input terminals with a 50
Ohm/10 W resistor.

Siemens AG C98130-A7580-A1-1-7619 Page 18 of 34
SITOP solar 08/2006
4.6.1 Replacing the Lithium Battery
The connection area of the devices contains a 3 V, type CR2450 lithium battery. This
battery is used to maintain the values stored on the data logger and for the total yield
and hours of operation. The battery is designed for a life of approximately 10 years.
However, replacement of the battery after approximately 5 years is recommended.
Be sure to have this work only performed by specialized personnel.
To replace the battery, proceed as shown below.
•Turn off device on power switch.
•Turn off DC circuit breaker in the generator connection box.
•Disconnect the power fuses of the incoming power line of the device, wait 5
minutes and take precautions to prevent accidental reconnection.
•Remove the terminal cover and then slightly lift the contact holder before carefully
removing the battery. Then immediately install the new battery with the minus
pole pointing towards the device.
•Screw down the terminal cover again.
•For device commissioning, see chapter 4.4
To avoid losing the values stored on the data logger, replacement of the lithium
battery may not take longer than 60 seconds.
5 Reactions of the Inverter
5.1 Switch-On Procedure
Switch on procedure
This is the first operational indication of the device after correct application of the
power and the solar voltage and the power switch has been turned on.
During a period of approx. 30 seconds the data logger is initialized and a self-test
and a power test are performed. This may last up to 20 minutes if the inverter has
been in storage for a long period.
The solar generator is checked for sufficient power output to prevent unnecessary
loss due to being turned on too early in the morning. The exact point in time depends
on the particular solar generator and the time of year and the local conditions. The
MASTER is able to measure the solar generator during operation and adjust its on
and off conditions accordingly.
After this procedure is executed successfully, the MASTER and any SLAVES
connect to the power.

Siemens AG C98130-A7580-A1-1-7619 Page 19 of 34
SITOP solar 08/2006
5.2 Normal Operation
SITOP Solar D
This is the normal display on the MASTER. The speed of the running light also gives
you a quick idea of how much solar power is being fed in.
The microprocessor integrated in the MASTER now assumes control of the system
and the following tasks are performed.
•Either online data or stored operational data are output via the data
interface.
•A check is made to determine whether and with what power the connected
SLAVES are running.
•The display together with the push button are controlled.
•The running light is activated.
•The integrated data logger is updated with new data.
5.3 Operation at Excessively High Ambient Temperatures
When the maximum heat dissipater temperature of 43 degrees Celsius is exceeded,
a internally installed fan goes on to exhaust the heat loss. The switchoff point is 38
degrees Celsius. To ensure particularly low-noise operation, the speed of the fan is
adjusted proportionately to the temperature of the heat dissipater.
5.4 Reaction to Too High/Too Low Temperature
When the temperature of the heat sink exceeds 85 degrees Celsius, the power fed to
the power network is gradually reduced. At 100 degrees Celsius heat sink
temperature the power has reached zero.
With even higher temperatures, the device goes off with an error message.
5.5 Reaction to Excess Availability of Power
If the available power of the solar generator exceeds the maximum power of the
inverter, operation continues with maximum power without the output of an error
message.
Caution: The maximum possible power of your solar field will not destroy your device
but the highest no-load voltage under unfavorable conditions (cold and high
radiation) will!
5.6 Parallel Connection of Several Inverters
When several MASTERS are in parallel operation on a system, be sure that the
devices feed in at different phases to reach a balanced power-output distribution and
to reduce cross influence of the power monitoring systems (ENS).
The MASTERS are equipped with two serial interfaces. This permits simple
connection of the devices using a 9-pin standard RS 232 cable. A single cable from
the first device is the connection to the PC. To enable the PC to distinguish between
the inverters, a separate device address must be assigned to each MASTER of the
system. The assignment of the device address is done with the PC and the SITOP
solar log software. For more information, see the user's guide of SITOP solar log.

Siemens AG C98130-A7580-A1-1-7619 Page 20 of 34
SITOP solar 08/2006
5.7 Night and Remote Switch-On
The display of the inverter is not on during the night. No data (total yield, etc.) are
visible. However, if a PC is connected directly or there is a connection via a MODEM,
the device can be addressed with the SITOP solar log PC software. The display
goes on and shortly thereafter "Nachtbetrieb" appears on the display.
Normal data communication via PC is now possible as well as paging through the
display by hand.
After approximately 4 minutes of bottom inactivity or no data communication by the
PC, the device goes off again by itself.
6 Operator Panel and Display
The display gives you information on your photovoltaic system and the inverter.
By pressing the button you can scroll through the various indicator values. While you
are viewing the current values of your photovoltaic system, the running light is off.
Without pressing the button, the display returns after a short time to its basic status
with the display "SITOP solar." The various measured values are presented as
shown below.
6.1 Operational Indicators
The language of the display can be selected from 5 different languages (German,
English, French, Spanish and Italian).
You need therefore the „Parametrierungssoftware“, contact your dealer.
All indicator values can be scrolled on the display by repeatedly pressing the button.
After you have viewed the various values, you are returned automatically to the first
indicator value.
Power DC 4260W
This is the first indication of the display after the button is pressed. The input power of
the MASTER with any connected SLAVES is shown as a total. A separate MPP
tracker on the MASTER and on each SLAVE operates the particular solar generator
at maximum power.
Ma: P_DC 1420W
S1: P_DC 1430W
S2: P_DC 1430W
The total power of the system is presented decoded here. Due to the automatic
recognition of the SLAVES, their values are naturally only indicated when they are
actually present. With the SITOP solar 1500 master, S1 is the SLAVE which is
connected to the left of the MASTER in the connection area. S2 is the value of the
SLAVE connected to the right of the MASTER.
Since only one additional SLAVE can be connected with the SITOP solar 2300
master, only S1 is displayed.