Steca Solarix 2020-x2 Installation And Operating Instructions Manual
EN
751.792 | Z01 | 1504
Solar charge controller
Solar charge controller for
two batteries 12 V/24 V 20 A
Installation and operating instructions
EN About these operating instructions
Contents
1 About these operating instructions ........................................... 2
2 Safety ........................................................................................ 3
3 Description ................................................................................ 4
4 Installation ................................................................................ 7
5 Maintenance ........................................................................... 12
6 Self test ................................................................................... 12
7 Faults and remedies ................................................................ 13
8 Technical data ......................................................................... 18
9 Commercial and legal guarantee conditions ........................... 22
1 About these operating instructions
These operating instructions are part of the product.
Read these operating instructions carefully before use.
Keep these operating instructions in the vicinity of the
product over the entire lifetime of the product.
Pass these operating instructions on to every subsequent user
of the product.
1.1 Description of symbols
Safety instructions are labelled as follows:
Keyword
Measures for avoiding danger
Instructions relating to the functional safety of the system are in
bold type.
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Safety EN
2 Safety
2.1 Designated use
The solar charge controller may only be used for charging
and controlling lead-acid batteries (with liquid or solid
electrolyte).
The solar charge controller may only be connected to a solar
generator (solar module or array of solar modules within the
limits of the permissible connection values) and must not be
connected to any other energy source.
The specifications of the solar charge controller and the
connected components listed in these operating instructions
must be adhered to.
The manufacturer’s specifications for the solar modules and
batteries must be adhered to.
2.2 General safety instructions
Follow the general and national safety and accident
prevention regulations.
The factory-applied labels on the device must not be
modified or removed.
Keep children away from photovoltaic systems.
Do not open the device.
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EN Description
Danger of fire and explosion
Do not use the solar charge controller in any of the
following situations:
- In dusty environments
- In the vicinity of solvents
- In environments where inflammable gases and
vapours can be present
Do not expose the batteries to open flames or sparks.
Ensure that the room is adequately ventilated.
Perform regular checks to ensure that the system is
functioning (charging) correctly.
Follow the charging instructions of the battery
manufacturer.
3 Description
The solar charge controller utilises the electrical power
generated by solar modules for charging two batteries and for
directly supplying electrical loads.
Product features:
Automatic voltage adjustment 12 V/24 V DC
Charging of main and auxiliary batteries
Monitoring of the charge state of the batteries
Dynamic charge control depending on the charge state of the
batteries (charging priority given to the main battery)
Automatic switch-on after shutdown
Suitable for systems with negative pole connected to
common ground
Solar charge controller provides overcharge protection and
deep discharge protection for the batteries
Automatic monthly maintenance charge
Hibernation mode
Separate load circuit for external loads (can only be used
when the main battery is sufficiently charged; indicated by
LED 4 lit up yellow or green at the load output)
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Description EN
USB charge socket (e.g. for charging a mobile phone)
Can be expanded with an external remote display
Can be integrated into the StecaLink bus system
Structure:
1 LED 1 and terminal block for auxiliary battery (battery II)
2 LED 2 and terminal block for solar module
3 LED 3 and terminal block for main battery (battery I)
4 LED 4 and terminal block for connecting loads (load circuit)
5 Plastic housing
6 Connection for StecaLink bus system
7 USB charge socket
8 Fastening holes (4 holes)
The solar charge controller can be used indoors and in vehicles.
The charging programme is optimised for one main battery and
one auxiliary battery.
All types of lead-acid batteries can be connected (with liquid or
solid electrolyte).
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EN Description
Battery charge
state
LED 1 and LED 3
displays
(solar module
not charging)
LED 1 and LED 3 displays
(solar module
charging)
100 %
Green flashing1)
Green slowly alternating
between bright/dark
Green fully lit2)
50 %
Yellow fully lit
Yellow slowly alternating
between bright/dark
0 %
Red fully lit
3)
Red slowly alternating
between bright/dark
Red flashing4)
When only one battery is used then this must be connected to
the main battery terminals.
The charging times depend on the power provided by the solar
module and the capacity of the battery.
With a maximum load current of 20 A the load circuit is suitable
for external appliances with a power rating of up to 240 W at
12 V and 480 W at 24 V.
The solar charge controller begins operating as soon as a battery
is connected. If the solar module delivers no voltage for more
than 48 hours, the solar charge controller will enter hibernation
mode (all LEDs are deactivated). When a voltage is delivered
again by the solar module, the charge controller will resume
functioning again within 30 minutes.
The user does not need to operate the solar charge controller or
make any settings.
Four multicolour LEDs indicate the operating status, charge state
and any faults that may occur (see “Faults and remedies”).
LED displays
1 )
Cut-off voltage reached, excess energy available
2 )
Charge state: fully charged
3 )
Charge state: low charge
4 )
Battery deeply discharged
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Installation EN
LED 2
Solar module
Meaning
Green fully lit
Solar module connected, no charging
current flowing
Green slowly alternating
between bright/dark
Charging current flowing
Yellow fully lit
Solar module voltage too low
Off
Solar module voltage below 8 V
LED 4
Load circuit
Meaning
Green fully lit
Load switched on
Green slowly alternating
between bright/dark
Special function switched on (only in
conjunction with an optional external
remote display)
Yellow fully lit
Pre-warning: battery weak
Off
Load circuit switched off to protect
the batteries
4 Installation
Danger of fire and explosion
The solar charge controller may only be connected to
loads and the batteries by suitably trained and qualified
personnel in accordance with the applicable regulations.
The installation and operating instructions for all com-
ponents of the photovoltaic system must be observed.
Ensure that no cables are damaged.
Do not mount the solar charge controller outdoors or in wet
rooms.
Do not subject the solar charge controller to direct solar
irradiation or other sources of heat.
Protect the solar charge controller from dirt and moisture.
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