Steca Solarix 2020-x2 Bedienungsanleitung

Solar charge controller

Solar charge controller for

two batteries 12 V/24 V 20 A

Installation and operating instructions

751.792 | Z01 | 1504

EN About these operating instructions

2 751.792 | Z01 | 1504

Contents

1About these operating instructions...........................................2

2Safety ........................................................................................3

3Description ................................................................................4

4Installation ................................................................................7

5Maintenance ...........................................................................12

6Self test ...................................................................................12

7Faults and remedies ................................................................13

8Technical data .........................................................................18

9Commercial and legal guarantee conditions ...........................22

1About 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.

Safety EN

751.792 | Z01 | 1504 3

2Safety

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.

EN Description

4 751.792 | Z01 | 1504

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.

3Description

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)

Description EN

751.792 | Z01 | 1504 5

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).

EN Description

6 751.792 | Z01 | 1504

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

Battery charge

state

LED 1 and LED 3

displays

(solar module

not charging)

LED 1 and LED 3 dis-

plays

(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 lit3)

Red slowly alternating

between bright/dark

Red flashing4)

1 ) Cut-off voltage reached, excess energy available

2 ) Charge state: fully charged

3 ) Charge state: low charge

4 ) Battery deeply discharged

Installation EN

751.792 | Z01 | 1504 7

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

4Installation

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.

EN Installation

8 751.792 | Z01 | 1504

Mount the solar charge controller upright on a non-

inflammable surface.

Maintain a minimum clearance of 10 cm above and below

the unit to ensure free circulation of air.

Mount the solar charge controller as close as possible to the

batteries (but with a safety clearance of at least 30 cm).

Step 1 Mounting the solar charge controller

1. Use the drilling template to mark the hole positions on the

wall.

2. Drill 4 holes (Ø depending

on the wall material and

the fasteners used).

3. Use 4 suitable screws (not

provided) to fasten the con-

troller to the wall. The cable

openings must face down-

wards.

Step 2 Connecting the solar charge controller

Danger of fire and explosion

Solar modules generate electricity under incident light.

The full voltage is present, even when the incident light

levels are low. You must therefore protect the solar

modules from incident light during installation, e.g.

cover them.

Do not touch exposed cable ends.

Take care to ensure that the cables do not touch each

other.

Use only insulated tools.

Ensure that all loads to be connected are switched off.

Connections must always be made in the sequence

described below.

Ø approx. 5 mm

Installation EN

751.792 | Z01 | 1504 9

Cable cross sections

Distance

3 m

5 m

10 m

Current

20 A

4 mm²

6 mm²

10 mm²

10 A

2.5 mm²

4 mm²

6 mm²

5 A

2.5 mm²

4 mm²

The specified cable cross sections are minimum values. Please choose

somewhat higher cross sections (max. 10mm²) for a higher efficiency.

Cable terminal tighten-

ing torque

1.2 Nm

Cable lengths

Max of 10 m for solar module connection

cable

Max of 2 m for battery connection cable

Max of 10 m for load connection cable

Reference potential

Common negative pole (negative pole connect-

ed to common ground), earthing is not re-

quired

Fuse

30/40 A

Load output

240 Wmax(12 V)

480 Wmax(24 V)

Umax=60 V

Imax=20 V

Fuse

30/40 A

max. 2 m

2.5-10 mm²

max. 10 m

2.5-10 mm²

max. 2 m

2.5-10 mm²

max. 10 m

EN Installation

10 751.792 | Z01 | 1504

Connecting the batteries (first battery I, then battery II)

The main battery is connected to “Battery I”, the auxiliary

battery is connected to “Battery II”.

1. Label the battery connection cables as a plus cable (B1+ or

B2+) and a minus cable (B1- or B2-).

2. Lay the battery connection cables parallel to each other

between the solar charge controller and the batteries, but do

not yet connect them.

3. Install a 30 A (for a cable cross-section of 6 mm2) or 40 A (for

a cable cross-section of 10 mm2) fuse with fuse holder in the

plus cable as close as possible to the battery pole.

(The fuse holder is not included in the scope of delivery.)

4. Remove the fuse from the fuse holder.

5. Connect the battery connection cables with the correct

polarity to the terminal pairs with the corresponding battery

symbol (battery I or battery II).

6. Connect the plus cable to the positive pole of the battery.

7. Connect the minus cable to the negative pole of the battery.

The negative pole can be earthed if required.

8. Insert the external fuse

When the battery is correctly connected, LED 1 or LED 3 lights

up green, yellow or red depending on the charge state. LED 4

lights up green or yellow depending on the charge state of the

main battery.

Connecting the solar module

1. Ensure that the solar module is protected from incident light.

2. Label the solar module connection cables as a plus cable

(M+) and a minus cable (M–).

3. Lay the two solar module connection cables parallel to each

other between the solar module and the solar charge

controller, but do not yet connect them.

4. Connect the plus cable M+ with the correct polarity to the

solar module terminal pair on the solar charge controller.

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