Solutronic SolPlus 25 User manual

r
SOLPLUS 25 – 55 User Manual
SOLPLUS 25 – 55 User Manual
Firmware: 2.64
MV/ 2012-11 Version: B8, Subject to change without prior notice

SP25-55_User Manual_B8_EN_2012-11-06 2/32

SP25-55_User Manual_B8_EN_2012-11-06 3/32
Contents
1 Notes About The User Manual ....................................................................................................... 4
1.1 Scope.......................................................................................................................................... 4
1.2 More information......................................................................................................................... 4
1.3 Abbreviations.............................................................................................................................. 4
1.4 Symbols used in this document..................................................................................................5
2 Safety.............................................................................................................................................. 6
2.1 Safety in general......................................................................................................................... 6
2.2 Intended use............................................................................................................................... 6
2.3 Safety instructions...................................................................................................................... 6
2.4 Non-observance of this User Manual......................................................................................... 7
2.5 Nameplate .................................................................................................................................. 8
3 Introduction ................................................................................................................................... 10
4 General communication features.................................................................................................. 10
5 Operating states............................................................................................................................ 13
6 Display navigation SOLPLUS 25 - 55........................................................................................... 14
7 Communication with the Inverter Via the RS232 Port ..................................................................15
8 Communication With the Inverter Via the Ethernet Port and Webbrowser .................................. 15
9 Communication with Several Inverters by means of Master-Slave Data Communication...........15
10 SOLPLUS+ Communication Software.......................................................................................... 15
11 Files of the inverter ....................................................................................................................... 16
12 Communication with SolarLog™ .................................................................................................. 17
13 Sensor Connections...................................................................................................................... 17
14 Yield Monitoring............................................................................................................................ 18
14.1 Integrated energy meter....................................................................................................... 18
14.2 Annual energy logger........................................................................................................... 18
14.3 Connecting an external energy meter.................................................................................. 18
14.4 Operating hours meter ......................................................................................................... 20
14.5 Integrated yield monitoring................................................................................................... 20
15 Integrated Installation Monitoring.................................................................................................. 21
15.1 Possible causes of an alarm ................................................................................................ 21
15.2 Horn...................................................................................................................................... 23
16 Data Logger .................................................................................................................................. 23
17 Functions of the Relays and Analogue and Digital Inputs and Outputs....................................... 24
17.1 Function of relay 1................................................................................................................ 24
17.2 Function of relay 2................................................................................................................ 25
17.3 Analogue inputs ................................................................................................................... 26
17.4 Analogue outputs ................................................................................................................. 26
17.5 Digital inputs......................................................................................................................... 27
17.6 Digital outputs....................................................................................................................... 28
18 Password Protection..................................................................................................................... 29
18.1 Customised protection of the inverter settings..................................................................... 29
19 Resetting to Default Settings........................................................................................................ 29
20 Other Parameters ......................................................................................................................... 30
21 Large External Display.................................................................................................................. 32
22 Analogue or GSM Modem ............................................................................................................ 32

Notes About The User Manual
SP25-55_User Manual_B8_EN_2012-11-06 4/32
1 Notes About The User Manual
Dear Customer,
Thank you for buying a SOLPLUS solar inverter designed and manufactured by Solutronic.
This manual describes how to user your SOLPLUS inverter. Please keep it somewhere where you
have ready access to it whenever you need to.
Please comply at all times with the safety precautions we refer to in this manual.
In order to keep the description short, the section on communication deals mainly with the details of
display communication. For all other means of communication, reference is made to the relevant
manuals.
You can carry out all parameter settings described here using any of the different means of
communication available.
1.1 Scope
This User Manual applies to the following Solutronic inverters:
SOLPLUS 25, SOLPLUS 35, SOLPLUS 50, SOLPLUS 55.
1.2 More information
The following documents and software are provided on the accompanying CD and in the download
area of www.solutronic.de and can be used as a reference guide on how to operate your new inverter:
The CD contains the following documents and software:
• SOLPLUS 25 – 55 Fitters' Manual
• DimenSOL+ dimensioning tool (program for designing PV installations)
• SOLPLUS+ communication software (for the PC) and user manual
• Instructions for GSM/analogue modem (remote monitoring)
• Instructions for sensor installation (installation of sensor connections)
• Instructions for master-slave data network/yield monitoring
• Instructions for Ethernet browser
The SOLPLUS inverters have been developed, manufactured and tested with great care and are
incorporate the very latest technology. Our manufacturing procedures are in accordance with the
stipulations of ISO 9001.
If you encounter any problems or have any questions, please do not hesitate to get in touch with us.
Solutronic AG
Küferstrasse 18
D-73257 Köngen
[email protected]e
www.solutronic.de
1.3 Abbreviations
The following abbreviations are used in this manual:
SP 25 = SOLPLUS 25 – 55
SP 35 = SOLPLUS 35 – 55
SP 50 = SOLPLUS 50 – 55
SP 55 = SOLPLUS 55 – 55

Notes About The User Manual
SP25-55_User Manual_B8_EN_2012-11-06 5/32
SOLPLUS+ = Read-out and monitoring software for use with all Solutronic inverters
DC = Direct current (direct voltage): electrical value on the input side of the
inverter
AC = Alternating current (alternating voltage): electrical value on the output
side of the inverter
PV = Photovoltaic
Generator = Solar generator: interconnection of several solar modules to form a string
or a number of parallel strings
Password level -1 measured value, cannot be changed
Password level 1 client
Password level 2 installer
Passwort Level 3 Safety
Passwort Level 4 Master
1.4 Symbols used in this document
Please read and observe the following safety instructions in this manual.
The danger classes describe the risks of non-observance of the safety instructions.
(The safety instructions describe the following danger classes per ANSI.)
Caution!
"Caution!" denotes a warning that, if not observed, can result in personal
injury!
Warning!
"Warning!" denotes a warning that, if not observed, can result in death or
serious injury!
Danger!
"Danger!" denotes a warning that, if not observed, will result in death or
serious injury!
Note
Useful information and tips to help you operate the SOLPLUS inverter to
best effect.
Attention!
"Attention!" denotes a warning that, if not observed, can result in property
damage!

Safety
SP25-55_User Manual_B8_EN_2012-11-06 6/32
2 Safety
2.1 Safety in general
Please read the following safety information and instructions before you put the SOLPLUS inverter
into operation for the first time, in order to avoid personal injuries and/or property damage. These
instructions must be complied with at all times.
Do to attempt to install or put the SOLPLUS inverter into service until you have read through all the
documentation supplied thoroughly. Read through these safety instructions and all other user
instructions and tips before you begin work with this device.
If you sell on, hire out or pass on this device to someone else in some other way, make sure that you
give the new user these safety instructions, too.
2.2 Intended use
This device must be used only for the purpose described in this User Manual. The inverter is designed
for use in grid-connected photovoltaic installations. All safety regulations must be complied with. All
installation work must be carried out precisely as described in this manual. No modification of any kind
to or in this device or to its external wiring is permitted. Any such modification could lead to serious
safety problems and danger to life and limb.
2.3 Safety instructions
Warning!
Improper use of these devices, non-observance of the warnings given in
this manual and improper tampering with the safety functions can lead to
property damage, personal injury, electric shock and, in extreme cases,
death.
Caution!
The surface of the inverter housing can become hot when the inverter is in
operation. Very hot! Do not touch!
Danger!
High voltage due to incorrect connection! Risk of fatal or bodily injury from
electric shock.

Safety
SP25-55_User Manual_B8_EN_2012-11-06 7/32
2.4 Non-observance of this User Manual
Solutronic AG shall accept no liability for damages resulting from non-observance of the warnings
given in this User Manual.
Read the operating, maintenance and safety instructions before you put the device into operation for
the first time. If you are not able to understand the language used in this documentation sufficiently,
please contact and inform the supplier of the situation.
Trouble-free and safe operation of this inverter presumes proper, professional and workmanlike
transportation, storage, mounting and installation as well as careful operation and thorough
maintenance.
Notice
Solutronic AG is not liable for the consequences arising from faulty
installation of the inverter!
Among these consequences are:
•Damage to the display and keyboard foil, deterioration of readability
•Fading of the print on the housing, the look of the housing
deteriorates
Therefore, chose the place of installation for the inverter so that the device
is not directly or indirectly exposed to UV radiation:
•The device must not be exposed to direct sunlight
•The device must be protected from reflections by glass facades or
PV modules

Safety
SP25-55_User Manual_B8_EN_2012-11-06 8/32
2.5 Nameplate
You can identify the model of your inverter by looking at the nameplate. The nameplate, which carries
the precise type designation of the inverter, is located on the right-hand side of the housing. The
example is valid for SOLPLUS 25 – 55.
Nameplate of a SP 35
S/N 0938-0001
SP 35, IP 21
MC4
MAC: 0021EC050001

Safety
SP25-55_User Manual_B8_EN_2012-11-06 9/32
2.5.1 Explanation of the symbols used on the nameplate
The nameplate provides the following information:
Attention! Hot surfaces!
Attention and danger!
Observe the operating instructions!!
Waste Electrical and Electronic Equipment (WEEE)
Solar inverters must not be disposed of with household waste. Please
return the device to Solutronic after it has reached the end of its useful
life.
Attention! The inverter may still carry voltage even after it has been
disconnected from the PV installation and grid. Please be sure to wait
until the capacitors have fully discharged (discharge period).
S/N 0938-0001
SP 35, IP 21
MC4
MAC: 0021EC050001
•Production date and serial number
•Inverter model and degree of protection
•Connectors at DC end
•MAC address of integrated Ethernet port

Introduction
SP25-55_User Manual_B8_EN_2012-11-06 10/32
3 Introduction
Each SOLPLUS inverter features a number of interfaces and communication ports via which the data
of the inverter can be read out. A total of approximately 300 inverter parameters can be read out.
The data provided by the inverter are divided into the following categories:
1 Yield and display values: These values represent the instantaneous values of the inverter.
They are actual values and display values that cannot be altered.
2 Setting values: These are values that can be set and altered individually. Depending on the
importance and meaning of the parameters, these values can be set by the final customer, the
fitter or the utility company. For security purposes, different password levels are incorporated.
4 General communication features
Note
An external plug-in AC adapter can be used to provide an auxiliary
power supply.
12 V DC
300 mA, with built-in modem 1 A
Connector, 5.5 x 2.1 pin + (positive), sheath – (negative)
SOLPLUS 25 - 55
1 RS232 X1 7 Ethernet X7
2 RS485 X2 8 DC switch
3 Slot for option cards
9 DC connections
4 External connector X4
10 Additional PE connection
5 External terminal strip X5
11 DC connections
6 Auxiliary power supply X6
8
9
6
5
2
1
7
3
10
4
11

General communication features
SP25-55_User Manual_B8_EN_2012-11-06 11/32
Parameter 265: COM1 log type
Menu: Communication/Basic settings
Unit: ---
Resolution: 1
Default setting: 0
Password level: 1
Parameter 265 defines which protocol is used for communication via the standard port, COM1, of the
inverter. COM1 is both the 9-pin SubD female connector X1 for RS232 and also the 3-pin terminal
strip X2 for RS485.
The signals for X1 and X2 are connected together in circuit in the inverter. This means that it is not
possible to use different protocols via the standard RS232 and the standard RS485 at the same time.
General notes on parameter 265:
Value Meaning
0 ASCII protocol (for using the inverter with HyperTerminal)
1 Solutronic protocol (for using the inverter with SOLPLUS+). N.B.: Leave parameter 265
set to the value 0; 0 = ASCII protocol is automatically switched internally to 1 =
Solutronic protocol
2 Debug function. Do not use.
3 Modem with ASCII protocol
4 Modem with Solutronic protocol. N.B.: When operating via modem, leave parameter 265
set to the value 3; 3 = Modem with ASCII protocol is automatically switched internally to
4 = Modem with Solutronic protocol
5 Not active
6 Not active
7 GSM modem with ASCII protocol
8 Not active
9 SolarLog protocol for SolarLog™ data logger
Note
SolarLog™ and Solutronic's master-slave data communication function
can not be used at the same time.

General communication features
SP25-55_User Manual_B8_EN_2012-11-06 12/32
Parameter 266: COM2 log type
Menu: Communication/Basic settings
Unit: ---
Resolution: 1
Default setting: 0
Password level: 1
Parameter 266 defines which protocol is used for communication via the second COM2 port of the
device. COM2 is accessible in the form of the RS232 port at X4 (25-pin SubD female connector). The
option card (modem, RS485) is also connected via COM2. The signals for X4 or the option cards are
connected together in circuit in the inverter. This means that it is not possible to use different protocols
via the second RS232 and the option cards.
The following settings are possible:
Value Meaning
0 ASCII protocol (for using the inverter with HyperTerminal)
1 Solutronic protocol (for using the inverter with SOLPLUS+). N.B.: Leave parameter 266
set to the value 0; 0 = ASCII protocol is automatically switched internally to 1 =
Solutronic protocol
2 Debug function. Do not use.
3 Modem with ASCII protocol
4 Modem with Solutronic protocol. N.B.: When operating via modem, leave parameter 266
set to the value 3; 3 = Modem with ASCII protocol is automatically switched internally to
4 = Modem with Solutronic protocol
5 Large RiCo display
6 Large Schneider display
7 GSM modem with ASCII protocol
8 Not active
9 SolarLog protocol for SolarLog™ data logger
Note
SolarLog™ and Solutronic's master-slave data communication function
can not be used at the same time.
N.B.: If you want to operate the inverter directly and locally using a PC, please use the 0 setting
(default setting).
In this case, it is unimportant whether you use RS232 or RS485 to establish a link with the inverter or
the inverter's data network.
Automatic switch-over of the type of protocol from 0 to 1 (i.e. from operation with HyperTerminal to
operation with SOLPLUS+) cannot be reversed. To do so, the inverter would have to be reset, i.e.
switched off and on again. The same applies to automatic "switch-over" of the type of protocol from 3
to 4 (i.e. from modem operation with HyperTerminal to modem operation with SOLPLUS+).
If the protocol setting is 3, 4, 5 or 6, this port cannot be used directly with HyperTerminal or
SOLPLUS+. To do so, the corresponding parameter has to be reset either by means of the display or
via the other port.

Operating states
SP25-55_User Manual_B8_EN_2012-11-06 13/32
5 Operating states
The operating states of the SOLPLUS 25 - 55 inverters are indicated by means of a light-emitting
diode (LED) and on the display.
The LED has two colours and indicates the instantaneous operating state of the inverter. The actual
operating state is indicated on the display.
For the operating state to be identified, the DC side of the inverter must be connected to the PV
modules and a minimum voltage of approx. 280 V must be input into the inverter.
Example SOLPLUS 25 – 55 display
Meaning the operating states
What to do in the case of a fault
If the LED on the inverter lights up red or red/green, read up the fault description in the
Installation Instructions manual or note down the warning/alarm/fault message indicated on the
display and contact your fitter.
It is best if you read out all the data supplied by the SOLPLUS inverter: the last fault displayed,
fault memory, data logger and list of all parameters.
LED Explanation Display content
Constantly lit
green
Grid-feed mode SOLPLUS 50
PAC=2510 W
Grid-feed mode
Menu ►
Flashing green Initialisation or standby, e.g. because the
voltage of the solar generator is too low SOLPLUS 50 PAC=0W
Initialisation
Menu ►
Flashing red/green
Fault has occurred
or
Restart in progress
SOLPLUS 50
PAC=0W
Initialisation
Menu ►
Constantly lit red Fault in at least one phase of the inverter SOLPLUS 50
PAC=0 W
Grid failure
Menu ►
P LED
1
Production date

Display navigation SOLPLUS 25 - 55
SP25-55_User Manual_B8_EN_2012-11-06 14/32
6 Display navigation SOLPLUS 25 - 55
Base window: by pressing a button the display turns on and the main screen appears.
The basic menu is accessed by pressing the down arrow key on the display. In the basic menu, the yield values can be read. By pressing the arrow key left, you return to the base
window.
The main menu is accessed by pressing the arrow key to the right. Before entering the main menu, the password is requested. The sequence  
(up/right/down/up/right/down), confirmed with “OK”, enters the main menu. Inside the main menu you could modify in several submenus the desired parameters. By pressing the
left key, you return to the base window.
The actual value menu could be accessed by pressing the arrow key left. It is separated into four menu groups. Inside, you could access several parameters. By pushing the
arrow key left again, you reach the following menus. At the end you get back to the base window. (more information on the display menu can be found on the CD and the download
section at www.solutronic.de).
Basic menu
Actual value menu
OUTPUT
INVERTER
YIELD MONITOR
Enter password
Press key combination and
Confirm with OK
Device Configuration
Safety
Communication
Datalogger
Maintenance
Actual value menu
Basic menu Main menu
slave data
installation data
annual energy logger
energy today 0,0kWh
energy total 0,0kWh
amount euro today 0,0€
amount euro total 0,0€
firmware version 1,29
SPP Address 2
IP: 192.168.0.99 -
11:56:17 (time) -
15.12.2011 (data) -
Password request
Actual value menu
Basic configuration
Main menu
INPUT
DC voltage 231 V
DC current 7,6 A
power DC 1794W
INPUT
SOLPLUS 35
PAC : 3416 W
grid-feed mode
Menu
Yield control
Options
Power Reduction
Reactive Power

Communication with the Inverter Via the RS232 Port
SP25-55_User Manual_B8_EN_2012-11-06 15/32
7 Communication with the Inverter Via the RS232 Port
All that is required to connect the inverter to a PC is a serial connection cable. Only pins 2, 3 and 5 are
relevant in respect of the wiring in the cable. The cable should be no more than 15 metres long.
The PC or laptop to be connected must have an RS232 port. If the computer is equipped with just a
USB port, a USB–RS232 port adapter cable must be used.
Data are read out by means of the SOLPLUS+ or HyperTerminal software.
8 Communication With the Inverter Via the Ethernet Port
and Webbrowser
With the help of a PC, you can use the Ethernet link to control the inverter via a web browser or
Solutronic's communication software SOLPLUS+. Provided that your converter is connected to a
network and has been configured correctly, you can call up and read out data from your inverter via
any PC connected to the network.
N.B.: Internet Explorer has difficulties displaying carriage returns and line feeds in text files. We
therefore recommend you use Mozilla Firefox as the web browser.
If you are interested in setting up this form of communication, please load the instructions for the
Ethernet browser from the CD supplied or download them from www.solutronic.de.
9 Communication with Several Inverters by means of
Master-Slave Data Communication
The master-slave data communication function is used to network up to 32 inverters in an installation.
For this purpose, the inverters must be connected to each other via the standard RS485 port. One of
the inverters in the installation is defined as the "data master". The display of this inverter then shows
the most important data (the data of the basic menu). The "data master" also records the current
power level and the yields of the "data slaves" and adds them together.
If you are interested in setting up this form of communication, please load the instructions for master-
slave data communication from the CD supplied or download them from www.solutronic.de.
10 SOLPLUS+ Communication Software
SOLPLUS+ is a Windows program for evaluating inverter data and incorporates the following basic
functions:
•Configuration of the inverter
•Connection to the inverter via RS232, Ethernet and modem
•Easy configuration of an installation: you can store different configurations, i.e. different
installations. For example, you can monitor an installation with 2 inverters on your roof via
RS232 or RS485. You can then load a new configuration to call up and monitor an installation
that consists of 10 inverters via modem.
•In the same way as with the display, you can use SOLPLUS+ to configure your inverter how
you want to. You can also use the PC to enter a password and then change settings that are
not relevant to safety.
•Modification and implementation of the various "files" that the inverter supplies: list of all
parameters, fault memory, annual energy logger etc.
SOLPLUS+ reads out the data logger and transfers the data to the PC. The values to be read out and
displayed must be selected individually by the user. All parameters can be read out. Simple operator
control and a Help function make it possible to monitor how your PV installation is functioning and its
yield.

Files of the inverter
SP25-55_User Manual_B8_EN_2012-11-06 16/32
If you are interested in using SOLPLUS+ to monitor your inverter, please load the program and the
installation and user manuals of SOLPLUS+ from the CD supplied or download them from
www.solutronic.de.
11 Files of the inverter
The inverter generates various "files", which can be read out via one of its communication ports and
communication modes.
File number Name Description
0 No file -
1 Fault memory The fault memory – a list of the last 100 faults, with
date, time and fault number. These are stored in the
sequence in which they occurred (with date and
timestamp).
2 List of all parameters A table showing all the parameters of the inverter, with
parameter number, parameter name, parameter value
and unit
5 List of actual values A table showing all parameters and the actual values,
i.e. values which can be changed
6 Data logger The data logger: entries with a time stamp and values
of the parameters
7 Annual energy logger A table in the form of a ring memory (endless loop
memory) about the preceding year with the achieved
yield of each respective day in kWh. Resolution: 0.1
kWh
8 Annual sensor logger A table in the form of a ring memory (endless loop
memory) about the preceding year with the achieved
"theoretical yield" of the insolation sensor (if connected)
on each respective day in kWh. Resolution: 0.1 kWh
9 Annual sensor/energy
logger A table in the form of a ring memory (endless loop memory) relating to the preceding year, with the
achieved yields of the inverter and the insolation sensor
(if connected) on each respective day in kWh.
Resolution: 0.1 kWh
10 (A) Configuration of data
logger A description of the configuration (contents) of the data logger with the estimated storage times
13 (D) Installation monitoring A list with the yield values of the master, insolation
sensor and all slaves as well as the yield values of the
master, sensor and all slaves relative to the connected
nominal DC output. This list is in the form of a ring
memory (endless loop memory) and has been created
over the course of the preceding year. It cannot be read
until the integrated yield monitoring function has been
started and successfully ended (see chapter entitled
"Yield monitoring")
14 (E)
Alarms A list of the alarms which occurred on this day. These are stored in this file in the sequence in which they
occurred. Additional information as well as the time are
also stored here
The above files can be created and read out using SOLPLUS+ or the web browser.

Communication with SolarLog™
SP25-55_User Manual_B8_EN_2012-11-06 17/32
12 Communication with SolarLog™
The data logger known as SolarLog™ from Solare Datensysteme GmbH can be used to network up to
32 inverters in an installation.
Please note that SolarLog™ and Solutronic's master-slave data communication function cannot be
used at the same time.
For communication with SolarLog™ the inverters and SolarLog™ must be connected to each other via
the standard RS485 port. Note the pin assignments of the RS485 connectors, which differ as follows:
Weitere Information zum Betrieb und zur Einstellung von SolarLog finden Sie im
„Installationshandbuch Solarlog“ auf www.solutronic.de.
13 Sensor Connections
A large number of different sensors can be connected to the inverter. The following sensor types are
currently supported:
Manufacturer Type/Model Remark
Mencke & Tegtmeyer Si-01TC Insolation sensor with internal
lithium battery
Usage conditional due to limited
service life of the battery
Mencke & Tegtmeyer Si-01TCext Insolation sensor
Mencke & Tegtmeyer Si-01TC-T Insolation sensor with
temperature sensor, see
description of parameter 209
Tritec Spektron 300 Insolation sensor
This list is constantly being added to. Please contact us if you would like information on a type/model
of sensor that is not in the list above.
If you interested in connecting sensors, please load the corresponding instructions on connecting
sensors from the CD supplied or download them from www.solutronic.de. You will also find additional
information there.
SP100 / 120
M12 farbcodiert SP100 / 120 M12 SP25 - 55 3polig SP25 -55 Patch SolarLog
RS485 A (+) weiß 2 1 (links) 3 (gn/ws) 1
RS485 B (-) schwarz 4 2 (mitte) 6 (gn) 4
Masse blau 3 3 (rechts) 1+2 (or or-ws) 3
-frei- 2

Yield Monitoring
SP25-55_User Manual_B8_EN_2012-11-06 18/32
14 Yield Monitoring
14.1Integrated energy meter
The inverter is equipped with an integrated energy meter that calculates and adds up the energy fed
into the mains power supply (accuracy: approx. 1.5%).
N.B.: The energy meter of the inverter deliberately indicates a value approx 1.5% lower than that
actually fed into the grid. The purpose of this is to ensure the inverter does not indicate to you, the
owner, a value that is higher than that recorded by the actual "calibrated" export meter of your power
supplier.
Parameter 8: Energy today
Menu: Actual values/Yield monitor
Unit: kWh
Resolution: 0,001 kWh
Default setting: 0
Password level: 1
This displays the amount of energy fed into the grid so far today.
N.B.: The value is not saved and the amount of energy fed in during the whole day is displayed shortly
before it becomes dark.
Parameter 12: Energy total
Menu: Actual values
Unit: kWh
Resolution: 1 kWh
This parameter is used to display the total amount of energy the inverter has fed into the power supply
system since its installation.
Parameter 29: Compensation Euro per kWh
Menu: Yield control
Unit: €/kWh
Resolution: 0,0001 €/kWh
Default setting: 0.287€/kWh
Password level: 1
This parameter displays the currently applicable compensation per kW/h of energy supplied to the
grid.
14.2Annual energy logger
The inverter records the daily yield for every day of the year. The inverter is equipped with a memory
that stores the yield for 365 days. This memory is cyclical, i.e. after a year, it overwrites the old values
stored.
The annual energy logger can be read out via any of the available communication ports.
You call up the annual energy logger in the display from the basic menu.
14.3Connecting an external energy meter
To enable additional monitoring of yield, it is also possible to connect an external energy meter
(electricity meter) with S0 output (prerequisite) directly to the inverter.
This external energy meter may be the actual export meter used by the utility company to record the
amount of electricity fed into the grid. Due to the fact that the internal energy meter of the inverter is
deliberately inaccurate, the option of connecting an external energy meter enables the exact value the
PV installation actually yields to be recorded and displayed.
The external energy meter output pulses via the S0 output, which the inverter detects and records.
Connecting the external energy meter to connector X4 of the inverter:

Yield Monitoring
SP25-55_User Manual_B8_EN_2012-11-06 19/32
The connector pin assignments are as follows:
X4, pin 13 Positive connection of the S0: output of the energy meter.
Maximum voltage: 5 V; maximum current: 16 mA
X4, pin 23 Ground = negative connection of the S0: output of the energy meter
The following parameters are used for configuring and displays:
Parameter 127: SO-counter pulse per kWh
Menu: Options/basic settings
Unit: ---
Resolution: 1
Default setting: 2000
Password level: 1
This parameter specifies how many pulses the external energy meter supplies per kWh. This value
can be found on the external meter itself and it must be entered here under this parameter to ensure
correct calculation.
N.B.: In some cases, the amount of energy per pulse is also given on the meters.
Examples:
•0.5 Wh/pulse equates to 2000 pulses/kWh
•Wh/pulse equates to 500 pulses/kWh
Parameter 128: SO-counter pulse
Menu: Actual values/Yield monitor
Unit: ---
Resolution: 1
This parameter counts the actual number of pulses input and is used for internal calculation. The value
of this parameter is regularly saved to guard against loss in the event of a power failure.
Parameter 151: SO-counter energy
Menu: Actual values/Yield monitor
Unit: kWh
Resolution: 1 kWh
If an external energy meter is connected and parameter number 127 is set accordingly, the energy
measured by the external (S0) energy meter is displayed.
Parameter 222: SO-counter power
Menu: Actual values/Yield monitor
Unit: W
Resolution: 1
This displays the power currently being measured by the external (S0) energy meter. Note that the
power value displayed is always time-delayed and rounded off because it has to be back-calculated
from the number of pulses. This parameter can be used to display the power of a "neighbouring
installation" or "external installation" in an installation equipped with Solutronic inverters (e.g. for a
large external display).

Yield Monitoring
SP25-55_User Manual_B8_EN_2012-11-06 20/32
Parameter 224: SO-counter energy day
Menu: Actual values/Yield monitor
Unit: kWh
Resolution: 0,001kWh
This displays the "day yield", i.e. the yield on a particular 'today', measured by the external (S0) power
meter. This parameter can be used to display the day yield of a "neighbouring installation" or "external
installation" in an installation equipped with Solutronic inverters (e.g. for a large external display).
Parameter 225: SO-counter pulse today
Menu: Actual values/Yield monitor
Unit: ---
Resolution: 1
The number of S0 pulses measured 'today' is accurately recorded here.
14.4Operating hours meter
The inverter uses the following parameters to display the number of operating hours:
Parameter 123: Operating hours today
Menu: Actual values/Yield monitor
Unit: h (Stunde)
Resolution: 0,1 h
Parameter 123 displays the length of time the inverter has already been switched on today.
The meter starts running as soon as the solar generator delivers an adequate voltage.
Parameter 124: Operating hours total
Menu: Actual values/Yield monitor
Unit: h (Stunde)
Resolution: 0,1 h
Default setting: ---
Password level: 4
Parameter 124 records and stores the total length of time the inverter has been switched on since it
was first started up.
14.5Integrated yield monitoring
Each inverter is equipped with and capable of activating an integrated yield monitoring function. This
function is based on the comparison of yield data either from one inverter with an insolation sensor
connected or from an installation comprising at least 2 inverters that are networked by means of their
RS485 ports.
Details of how the yield monitoring function works can be found in the instructions for the master-slave
data network and in those for the sensor. Both manuals can be found on the CD supplied or can be
downloaded from www.solutronic.de. Your dealer can supply you with the activation code.