Steca MPPT 2010 User guide
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PHOTOVOLTAIK – PHOTOVOLTAICS – PHOTOVOLTAIQUE – FOTOVOLTAICA
Installation and
operating instructions
Solar charge controller
Solarix MPPT 2010
730.927 | 09.10
EN
Index
1. About these instructions ........................................................................
1.1 Applicability ............................................................................................
1.2 Users .......................................................................................................
1.3. Description of symbols ...........................................................................
2. Safety ......................................................................................................
2.1 Proper usage
...........................................................................................3
2.2 Improper usage ......................................................................................
2.3 General safety instructions .....................................................................
2.4 Other risks ..............................................................................................
2.5 Behaviour in the case of faults ...............................................................
3. Description .............................................................................................
3.1 Functions ................................................................................................
3.2 Structure .................................................................................................
3.3 LED displays ............................................................................................
4. Installation ..............................................................................................
4.1. Mounting the solar charge controller .....................................................
4.2 Connection .............................................................................................
5. Operation .............................................................................................
6. Maintenance .........................................................................................
7. Faults and remedies ..............................................................................
8. Technical data .......................................................................................
9. Legal guarantee ....................................................................................
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1. About these instructions
These operating instructions are part of the product.
Read these operating instructions carefully before use,
keep them over the entire lifetime of the product,
and pass them on to any future owner or user of this product.
1.1 Applicability
This manual describes the installation, function, operation and maintenance of
the solar charge controller.
Further technical information is provided in a separate technical manual.
1.2 Users
These operating instructions are intended for end customers. A technical expert
must be consulted in cases of uncertainty.
1.3. Description of symbols
Safety instructions are identified as follows:
SIGNAL WORD
Type, source and consequences of the danger!
Measures for avoiding danger
Instructions relating to the functional safety of the system are in bold type.
2. Safety
2.1 Proper usage
The solar charge controller may only be used in PV systems for charging and
controlling lead-acid batteries with liquid or solid electrolyte in accordance
with these operating instructions and the charging specifications of the battery
manufacturer.
2.2 Improper usage
No energy source other than a solar generator may be connected to the solar
charge controller. No mains devices, diesel generators or wind generators may
be connected.
Do not connect any defective or damaged measuring equipment.
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2.3 General safety instructions
Follow the general and national safety and accident prevention regulations.
Never alter or remove the factory plates and identification labels.
Keep children away from PV systems.
Never open the device.
2.4 Other risks
Danger of fire and explosion
Do not use the solar charge controller in dusty environments, in the vicinity
of solvents or where inflammable gases and vapours can occur.
No open fires, flames or sparks in the vicinity of the batteries.
Ensure that the room is adequately ventilated.
Check the charging process regularly.
Follow the charging instructions of the battery manufacturer.
Battery acid
Acid splashes on skin or clothing should be immediately treated with soap
suds and rinsed with plenty of water.
If acid splashes into the eyes, immediately rinse with plenty of water. Seek
medical advice.
2.5 Behaviour in the case of faults
Operating the solar charge controller is dangerous in the following situations:
The solar charge controller does not appear to function at all.
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The solar charge controller or connected cables are visibly damaged.
•
Emission of smoke or fluid penetration.
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When parts are loose.
•
In these cases immediately remove the solar charge controller from the bat-
tery and solar module.
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3. Description
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konv. Laderegler
MPPT
UBat
Umpp
Uoc
Solarzellen
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UBat
Umpp
Uoc
Solarzellen
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3.1 Functions
The solar charge controller
monitors the battery voltage,
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controls the charging process,
•
controls the connection/disconnection of loads connected to the load output.
•
This optimises battery use and significantly extends its service life.
A battery charging algorithm protects the battery from harmful states. Activa-
tion of the three deep discharge functions (LVW, LVD and LVR) is dependent
upon the battery voltage.
3.1.1 MPP tracking
This solar charge controller meets the latest technological standards since it is
equipped with an optimal MPP tracking algorithm and thus can use at all times
the maximum available output of the solar module. You will find more detailed
documentation about MPP tracking in the technical manual; which can be accessed at www.stecasolar.com.
3.1.2 What is MPP tracking (MPPT)?
MPPT stands for "Maximum Power Point Tracking". This describes a process by
means of which the solar module is always operated at the point of maximum
possible power. Because the point the maximum power can vary depending
on the operating mode and the local conditions, and because it changes in the
course of the day, the term "tracking" is used, i.e. the tracking of this point.
3.1.3 When should charge controllers with MPP tracking
be used?
Number of solar cells
U
OC
U
mpp
U
Bat
MPPT
Standard charge
controller
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Charge controllers with MPP trackers can be used for a wider range of modules
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than those without MPPT. With an MPP tracker one is no longer dependent on
the module voltage and string size. The module voltage can deviate significantly from the battery voltage.
3.1.4 Notes on choosing suitable solar modules
This solar charge controller has a maximum input voltage of 100 V. If this is
exceeded even for a short time by the connected solar module, the solar charge
controller will be damaged beyond repair and can never be used again. This will
NOT constitute a guarantee claim, the charge controller must then be replaced
at the customer's expense.
The essential value for choosing a solar module is the open circuit voltage
(U_oc). The open circuit voltage of the solar module is dependent on the ambient temperature. Information on the open circuit voltage of the solar module
and on temperature dependence can be found in the data sheet of the solar
module. The lower the ambient temperature, the higher the open circuit voltage of the solar module.
The open circuit voltage at -20 C may not exceed the maximum input voltage.
CAUTION
If an open circuit voltage of more than 100 V is supplied to the connected solar
module, the controller will be destroyed. When selecting the solar module, it
is important to bear in mind that the open circuit voltage should never exceed
100 V over the entire working temperature range.
When using solar modules with a maximum open circuit voltage of between
75 and 100 V (over the entire temperature range), all installation steps must be
carried in accordance with protection class II.
3.2 Structure
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The solar charge controller consists
of the following components:
Info LED
1.
4 LEDs for displaying the state of
2.
charge (red, yellow, green 1 and
green 2)
Terminal block for connecting
3.
the solar module
Terminal block for connecting
4.
the battery
Terminal block for connecting
5.
the loads
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