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MPPT Solar ChargeMaster 25
BATTERY SOLAR CHARGE REGULATOR
USER AND INSTALLATION MANUAL
10000009291/02
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MPPT Solar ChargeMaster 25 – User and Installation Manual
OVERVIEW
1. Power switch (Section 3.5)
2. Solar indicator LED (Section 3.6)
3. Charge indicator LED (Section 3.6)
4. Fault indicator LED (Section 3.6)
5. LCD-display (Section 3.6)
6. PV input
7. Battery connection
8. Load output
9. Grounding terminal
10. Temperature sensor jack
11. Identification label (Section 2.7)
Figure 1: Overview
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MPPT Solar ChargeMaster 25 – User and Installation Manual
3
TABLE OF CONTENTS:
1 IMPORTANT SAFETY INSTRUCTIONS ......................................................................................................................... 4
1.1 General .............................................................................................................................................................. 4
1.2 Explosive gases ................................................................................................................................................. 4
1.3 Warnings regarding the use of batteries ............................................................................................................. 4
1.4 Warning regarding life support applications ....................................................................................................... 4
2 GENERAL INFORMATION .............................................................................................................................................. 5
2.1 Use of this manual .............................................................................................................................................. 5
2.2 Liability ............................................................................................................................................................... 5
2.3 Warranty ............................................................................................................................................................. 5
2.4 Disclaimer........................................................................................................................................................... 5
2.5 Correct disposal of this product .......................................................................................................................... 5
2.6 Use of pictograms .............................................................................................................................................. 5
2.7 Identification label ............................................................................................................................................... 5
3 OPERATION .................................................................................................................................................................... 6
3.1 General .............................................................................................................................................................. 6
3.2 Maintenance ....................................................................................................................................................... 6
3.3 Three Step charge algorithm .............................................................................................................................. 6
3.4 Overview ............................................................................................................................................................ 7
3.5 POWER switch ................................................................................................................................................... 7
3.6 LEDs and LCD display ....................................................................................................................................... 8
4 INSTALLATION ................................................................................................ ............................................................... 9
4.1 Unpacking .......................................................................................................................................................... 9
4.2 Environment ....................................................................................................................................................... 9
4.3 Wiring and fuses ................................................................................................................................................. 9
4.4 Specifications of the PV array ............................................................................................................................ 9
4.5 Connection of loads .......................................................................................................................................... 10
4.6 Things you need ............................................................................................................................................... 12
4.7 Connection ....................................................................................................................................................... 12
4.8 Commissioning after installation ....................................................................................................................... 14
4.9 Use in combination with Mastervolt MLI battery ............................................................................................... 15
4.10 Software version ............................................................................................................................................... 16
4.11 Decommissioning ............................................................................................................................................. 16
4.12 Storage and transportation ............................................................................................................................... 16
4.13 Re-installation ................................................................................................................................................... 16
5 TROUBLE SHOOTING .................................................................................................................................................. 17
6 TECHNICAL DATA ........................................................................................................................................................ 18
6.1 Specifications ................................................................................................................................................... 18
6.2 Dimensions....................................................................................................................................................... 19
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MPPT Solar ChargeMaster 25 – User and Installation Manual
1 IMPORTANT SAFETY INSTRUCTIONS
READ AND SAVE THESE INSTRUCTIONS
WARNING!
Read the entire manual before using the Solar ChargeMaster. Keep this manual in a secure place.
This chapter describes important safety and operating instructions for use of a Solar ChargeMaster.
1.1 GENERAL
1 Before using the Solar ChargeMaster (SCM), read all
instructions and cautionary markings on the SCM and the
batteries.
2 To reduce the risk of electric shock – Do not expose the SCM
to rain, snow, spray, moisture, excessive pollution and
condensing circumstances. To reduce risk of fire hazard, do
not cover or obstruct the ventilation openings. Do not install
the SCM in a non-ventilated room, as overheating may
result.
3 Use of an attachment or spare part not recommended or
sold by Mastervolt may result in a risk of fire, electric shock,
or injury to persons.
4 The SCM is designed to be permanently connected to a PV
array and DC electrical system. Installation of, and work on
the SCM, may be carried out only by a qualified and trained
personnel, consistent with the locally applicable standards
and regulations.
5 Make sure that all wiring is properly installed and in good
electrical condition; and that wire sizes are large enough for
the ampere ratings of the SCM. Check the wiring on a
regular base, at least once a year. Do not use the SCM when
the wiring is undersized or damaged.
6 Do not operate the SCM if it has received a sharp blow, been
dropped, or otherwise damaged in any way; take it to a
qualified serviceman.
7 Except for the connection compartment, the SCM may not
be opened or disassembled. There are no serviceable parts
inside the cabinet. Take it to a qualified, authorized and
trained serviceman when service or repair is required.
Incorrect reassembly may result in a risk of electric shock or
fire.
8 Two primary energy sources are present: a PV array and
batteries. To reduce risk of electric shock, disconnect the
SCM from both energy sources before attempting any
maintenance or cleaning. Turning off controls will not reduce
this risk.
9 This appliance is not intended for use by persons (including
children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning
use of the appliance by a person responsible for their safety.
10 When the PV array is exposed to light, it supplies a DC
voltage to the SCM which can be dangerous to touch. For
this reason, use of an external DC-switch is strongly
recommended. Alternatively, before attempting any
maintenance or cleaning the PV-array should be protected
from light exposure, e.g. by covering the PV modules.
11 The SCM is provided with a grounding terminal. Grounding
and all other wiring must comply with local codes and
ordinances.
12 Short circuiting or reversing polarity will lead to serious
damage to batteries, SCM, wiring as well as accessories.
Fuses cannot prevent damage caused by reversed polarity
and the warranty will be void.
13 In case of fire, you must use the fire extinguisher which is
appropriate for electrical equipment.
14 If applied in a marine application in the United States,
external connections to the SCM shall comply with the
United States Coast Guard Electrical Regulations
(33CFR183, Sub part I).
1.2 EXPLOSIVE GASES
1 TO REDUCE RISK OF BATTERY EXPLOSION, FOLLOW THESE
INSTRUCTIONS AND THOSE PUBLISHED BY BATTERY
MANUFACTURER AND MANUFACTURER OF ANY EQUIPMENT YOU
INTEND TO USE IN VICINITY OF THE BATTERY. REVIEW
CAUTIONARY MARKING ON THESE PRODUCTS.
2 DANGER: To reduce the risk of explosion – Never use the
SCM in situations where there is danger of gas or dust
explosion or in areas in which ignition-protected equipment
is required.
1.3 WARNINGS REGARDING THE USE OF BATTERIES
1 Consider having someone close enough by to come to your
aid when you work near a lead-acid battery.
2 Have plenty of fresh water and soap nearby in case battery
acid contacts skin, clothing, or eyes.
3 Wear complete eye protection and clothing protection. Avoid
touching eyes while working near battery.
4 If battery acid contacts skin or clothing, wash immediately
with soap and water. If acid enters eye, immediately flood
eye with running cold water for at least 10 minutes and get
medical attention immediately.
5 NEVER smoke or allow a spark or flame in vicinity of battery
or engine.
6 Be extra cautious to reduce risk of dropping a metal tool onto
battery. It might spark or short-circuit battery or other
electrical part that may cause explosion.
7 Do not wear watches, bracelets, necklaces or other metal
objects when working on batteries.
8 Only use SCM for charging a LEAD-ACID or Mastervolt MLI
batteries and the supply of users attached to these batteries,
in permanent systems. Do not use SCM for charging dry-cell
batteries that are commonly used with home appliances.
9 NEVER charge a frozen battery.
10 Excessive battery discharge and/or high charging voltages
can cause serious damage to batteries. Do not exceed the
recommended limits of discharge level of your batteries.
11 If it is necessary to remove a battery, always remove
grounded terminal from battery first. Make sure all
accessories are off, so as not to cause an arc.
12 Be sure that the area around battery is well ventilated while
battery is being charged. Refer to the recommendations of
the battery manufacturer.
13 Batteries are heavy and may become a projectile if involved
in an accident! Ensure adequate and secure mounting and
always use suitable handling equipment for transportation.
1.4 WARNING REGARDING LIFE SUPPORT APPLICATIONS
Mastervolt products are not designed to be used as component
of medical equipment, unless negotiated in the form of a written
agreement between customer and/or manufacturer and
Mastervolt. Such agreement will require the equipment
manufacturer either to contract additional reliability testing of the
Mastervolt parts and/or to commit to undertake such testing as
a part of the manufacturing process. Furthermore, the
manufacturer must agree to indemnify and not hold Mastervolt
responsible for any claims arising from the use of the Mastervolt
parts in the life support equipment.
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2 GENERAL INFORMATION
2.1 USE OF THIS MANUAL
This manual serves as a guideline for the safe and effective
operation, maintenance and possible correction of minor
malfunctions of the Solar ChargeMaster 25. This manual is
only valid for the following model:
Part number
Model
131902500
MPPT Solar ChargeMaster 25
This model is further referred to as “Solar ChargeMaster”.
All the specifications, provisions and instructions contained
in this manual apply solely to standard versions of the Solar
ChargeMaster delivered by Mastervolt.
2.2 LIABILITY
Mastervolt can accept no liability for:
• Consequential damage resulting from the use of the
Solar ChargeMaster.
• Possible errors in the included manual and the
consequences of these.
• Use that is inconsistent with the purpose of the product.
2.3 WARRANTY
The Mastervolt product warranty covers the Solar
ChargeMaster for the first two years after the purchase
date, on the condition that the product is installed and used
according to the instructions in this manual.
Installation or use that do not comply with these instructions
may result in under performance, damage or failure of the
product and may void this warranty. The warranty is limited
to the cost of repair and/or replacement of the product.
Costs of labor or shipping are not covered by this warranty.
2.4 DISCLAIMER
Our products are subject to continual development and
improvement. Therefore, additions or modifications to the
products may cause changes to the technical data and
functional specifications. No rights can be derived from this
document. Please consult our most current Terms &
Conditions of Sale.
2.5 CORRECT DISPOSAL OF THIS PRODUCT
This product is designed and manufactured
with high quality materials and components,
which can be recycled and reused. Dispose of
according to WEEE.
Act according to your local rules and do not dispose of your
old products with your normal household waste. The correct
disposal of your old product will help prevent potential
negative consequences to the environment and human
health.
2.6 USE OF PICTOGRAMS
Safety instructions and warnings are marked in this manual
and on the product by the following pictograms:
CAUTION!
Special information, commands and
prohibitions in order to prevent damage.
WARNING
A WARNING refers to possible injury to the
user or installer or significant material
damage to the Solar ChargeMaster if the
installer / user does not (carefully) follow the
stated procedures.
Read this manual before installation and use.
This product has been declared conform the
EC directives and standards.
Degree of protection: IP23. The product is
protected against touch by fingers and water
spray < 60 degrees from vertical.
2.7 IDENTIFICATION LABEL
Figure 2: Identification label
The identification label is located at the right-hand side of
the Solar ChargeMaster (see Figure 1). Important technical
information required for service, maintenance & secondary
delivery of parts can be derived from the identification label.
CAUTION!
Never remove the identification label. This will
void the warranty.
Serial number
EO20A0678
Device version “A”
Part number
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MPPT Solar ChargeMaster 25 – User and Installation Manual
3 OPERATION
3.1 GENERAL
The Mastervolt Solar ChargeMaster is a fully automatic
battery charger which converts power from photovoltaic
(PV) array to a regulated battery voltage. The PV array
connected to the Solar ChargeMaster is operated at its
optimum voltage to obtain an optimal yield (Maximum
Power Point tracking). The Solar ChargeMaster will
automatically adjust itself to a 12V or a 24V system. Under
normal circumstances the Solar ChargeMaster remains
switched on with the PV-array and batteries connected.
When power from the PV array is enough, the Solar
ChargeMaster will initiate the charging process.
WARNING
The Solar ChargeMaster has no on/off switch.
Charging will be initiated as soon as power
from the PV-array becomes available.
The Solar ChargeMaster is protected against overload,
short circuit, overheating and under and over voltage.
CAUTION!
The Solar ChargeMaster is not protected
against:
• Excessive overvoltage on the Solar input;
• Surges inducted by lightning.
3.2 MAINTENANCE
No specific maintenance to the Solar ChargeMaster is
required. Examine your electrical installation on a regular
base, at least once a year. Defects such as loose
connections, damaged wiring etc. must be corrected
immediately.
If necessary, use a soft clean cloth to clean the casing of
the Solar ChargeMaster. Do not use any liquids or corrosive
substances, such as solvents, alcohol, petrol or abrasive
components.
In the event of decommissioning, refer to section 4.11
3.3 THREE STEP CHARGE ALGORITHM
See Figure 3. Battery charging is accomplished in three
automatic stages: BULK, ABSORPTION and FLOAT.
Figure 3: Three step charge system
• BULK: At this stage the charger delivers its maximum
current for quick charging from 0 to 80%.
• ABSORPTION: The charger has reached its maximum
charge voltage and the charge current will slowly
decrease until the battery is charged up to 100%.
• FLOAT: This stage begins once the battery is fully
charged. The battery remains in fully charged state.
By installing the battery temperature sensor, the charge
voltages are automatically adapted for deviating
temperatures.
Figure 4: Temperature compensated charging
See Figure 4. When the battery temperature is low, the
charge voltage increases. On the other hand, when the
battery temperature is high, the charge voltage is
decreased. Overcharge and gassing are prevented this
way. This will extend the life of your batteries.
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MPPT Solar ChargeMaster 25 – User and Installation Manual
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3.4 OVERVIEW
Figure 5: Operation of the Solar ChargeMaster
3.5 POWER SWITCH
POWER switch operation
Meaning
Press shortly
Activate LCD-display (see text below)
1 second
Switch on Solar ChargeMaster again after a fault or error situation
1 second
Mute audible alarm
>5 seconds
Battery type setting, see section 4.8.2
INPUT
Actual input power from PV-array
(Watts)
BATTERY TYPE
Battery type setting;
see section 4.8.2
ERROR
An error code is displayed in case
of a fault condition
CHARGING CURRENT
Actual output current of the Battery
Output (Amps)
LOAD
Actual load connected to the Load
Output (Watt)
OVERLOAD
Highlighted or blinking in case of
overload
POWER switch
See section 3.5
BATTERY VOLTAGE
Actual battery voltage (Volts)
BATTERY CAPACITY
Estimation of the battery state of charge;
WIRING FAULT
Highlighted in case of error in the wiring;
Fault indicator LED
A fault condition is detected; see section 3.6
Charge indicator LED
The batteries are being charged; see section 3.6
Solar indicator LED
PV Power is available; see section 3.6
LCD Display
See section 3.6
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MPPT Solar ChargeMaster 25 – User and Installation Manual
3.6 LEDS AND LCD DISPLAY
LED indication
LCD
indication
Audible
alarm*
Meaning
Blue
Green
(Off)
--
(Off)
Normal operation, batteries are being charged.
(Off)
(Off)
(Off)
(Off)
(Off)
Irradiation on the PV modules is insufficient (for instance
during night time). The Solar ChargeMaster is in sleep mode
to reduce power drain from the batteries. The display can be
activated temporally by pressing the POWER switch shortly.
The display will be deactivated automatically after 1 minute.
(Off)
(Off)
(Off)
(Off)
(Off)
No power from the PV-modules. Check wiring to PVmodules if the Solar ChargeMaster is switched off during
daytime. Check for loose connections or incorrect polarity.
(Off)
(Off)
Yellow
--
(Off)
Reversed polarity on the PV-input. Check PV array wiring.
(Off)
(Off)
Red
--
(Off)
Reversed polarity on the Battery connection. Check battery
wiring.
(Off)
(Off)
Orange
--
(Off)
Reversed polarity on the PV-input and Battery connection.
Check wiring.
--
--
--
OVERLOAD
blinking
Every 2
seconds
Overload on Load output (110%). Reduce connected load.
--
--
--
blinking
Every second
Low battery voltage. Reduce load connected to the batteries
and charge batteries.
--
--
--
F0
Continuously
Power from PV-modules is OK, but battery voltage too low
(< 8.5V @ 12V / <17V @ 24V). Check batteries.
--
--
--
F1
Continuously
Overcharge, battery voltage is too high. The charger will
automatically cut off output. Check batteries.
--
--
--
F2 +
OVERLOAD
Continuously
Overload on Load output (130%). The charger will
automatically cut off the output. Reduce connected load.
--
--
--
E1 +
ERROR
Continuously
Voltage from PV-modules is too high. Check PV-array.
--
--
--
E2 +
ERROR
(Off)
MLI Ultra battery only: Stop charge event generated. Refer
to user’s manual of the MLI Ultra battery.
--
--
--
E3 +
ERROR
Continuously
Battery temperature too high. Check batteries.
--
--
--
E4 +
ERROR
Continuously
Battery temperature too low. Check batteries.
* The audible alarm can be muted by holding the POWER switch pressed for 1 second.
** Refer to section 4.8.2 for battery type settings.
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MPPT Solar ChargeMaster 25 – User and Installation Manual
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4 INSTALLATION
During installation, commissioning and maintenance of the
Solar ChargeMaster, the Important Safety Instructions are
applicable at all times.
4.1 UNPACKING
The delivery includes the following items:
• Solar ChargeMaster;
• Battery temperature sensor;
• Modular cable assembly (see section 4.9);
• This User’s manual
• Important Safety Instructions
After unpacking, check the contents for possible damage.
Do not use the product if it is damaged. If in doubt, contact
your supplier.
4.2 ENVIRONMENT
Obey the following stipulations during installation:
• The Solar ChargeMaster is designed for indoor use
only.
• Ambient operating temperature: -20°C ... 55°C / -4°F …
131°F (power de-rating above 40°C / 104°F to decrease
the internal temperature).
• Humidity: 5-95%, non-condensing.
• The Solar ChargeMaster must be mounted to a vertical,
solid and heat-resistant surface, with the connecting
cables downwards.
• Do not expose the Solar ChargeMaster to excessive
dust, aggressive environments, ammonia or salt.
• Make sure that the hot air that is developed during
operation can be discharged. The Solar ChargeMaster
must be mounted in such a way that obstruction of the
airflow along the heatsink on the backside of the casing
will be prevented.
• The Solar ChargeMaster requires a minimum of 20
cm/8" of clearance on every side to ensure safety and
proper ventilation.
• Do not locate the Solar ChargeMaster in the same
compartment as the batteries.
• Do not install the Solar ChargeMaster straight above the
batteries because of possible corrosive Sulphur fumes.
• Although the Solar ChargeMaster fully complies with all
applicable EMC limits, it may still cause harmful
interference to radio communication equipment. If such
interference appears, it is recommended to increase the
separation between the Solar ChargeMaster and the
equipment, to relocate the receiving antenna or to
connect the equipment to a circuit different from that to
which the Solar ChargeMaster is connected.
4.3 WIRING AND FUSES
WARNING
The wire and fuse sizes stated in this manual
are given as guideline only. Always comply with
all local rules and regulations.
Keep in mind that high current will pass through the DC
wiring. Keep the cable length as short as possible, this will
keep the system efficiency as high as possible. The
recommended minimum cross sections of the wiring are:
Connection
Minimum DC Cable cross section
<2m / 6ft length
2 - 4m / 6 - 12ft
PV input
6mm² / AWG10
10mm² / AWG8
Battery
6mm² / AWG10
10mm² / AWG8
Load
6mm² / AWG10
10mm² / AWG8
Use boot lace ferrules on the wire ends. These ferrules
must be crimped with a proper crimping tool.
Use the following wire colors for DC wiring:
Wire color
Meaning
Connect to:
Red
Positive
+ (POS)
Black
Negative
– (NEG)
Lay the positive and negative cables next to each other to
limit the electromagnetic field around the cables. The
negative battery cable should be connected directly to the
negative post of the battery bank or the ground side of a
current shunt. Do not use the chassis frame as the negative
conductor. Tighten securely. The positive battery cable
must be fused and connected to the positive post of the
battery bank.
The recommended DC fuses are:
Connection
DC fuse
Battery fuse
40A
Load fuse
40A
4.4 SPECIFICATIONS OF THE PV ARRAY
WARNING
When the PV array is exposed to light, it
supplies a DC voltage to the Solar
ChargeMaster which can be dangerous to
touch. For this reason, use of an external DCswitch is strongly recommended. Alternatively,
before attempting any maintenance or cleaning
the PV-array should be protected from light
exposure, e.g. by covering the PV modules.
CAUTION!
Do not connect Solar ChargeMasters in parallel
on the side of the PV array.
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MPPT Solar ChargeMaster 25 – User and Installation Manual
The Solar ChargeMaster can be used with any PV array
configuration that satisfies the following requirements:
• Maximum open circuit PV voltage: 75 V DC;
• The open circuit voltage from the PV array must be
5Volts higher than the battery voltage.
CAUTION!
Never connect voltages higher than
specified to the PV-input, as this will cause
permanent damage to the Solar
ChargeMaster.
Configuration examples for PV-arrays consisting of
monocrystalline or polycrystalline PV-modules:
Battery voltage U
NOM
= 12V
Panel type
Number of panels
in series
parallel
36 cells
1 up to 3
Max. 360Wp
60 cells
1
Max. 360Wp
72 cells
1
Max. 360Wp
Battery voltage U
NOM
= 24V
Panel type
Number of panels
in series
parallel
36 cells
2 up to 3
Max. 720Wp
60 cells
1
Max. 720Wp
72 cells
1
Max. 720Wp
Note: The Solar ChargeMaster will automatically limit the
input current and power to its specified rating (see
section 6.1). Excess power will not be converted.
4.5 CONNECTION OF LOADS
Depending on the energy system in which the Solar
ChargeMaster is used, there are two options to connect the
electrical load to the Solar ChargeMaster:
• To the Load output on the Solar ChargeMaster, or
• Directly to the battery.
4.5.1 Load connected to the Load output
See Figure 6 for a typical installation diagram. The Load
output is provided with a protection circuit that switches off
the connected load automatically in case of overload or if
the battery voltage is too low. This kind of installation is
typically used when the PV-modules are the only source of
electrical power to charge the battery.
Characteristics:
• Maximum DC-load: 25A
• Under voltage disconnect: 10.5V
• Under voltage reconnect: 11.0V
4.5.2 Load connected to the battery
If the maximum load will exceed 25 Amps or if the battery
will also be charged by other energy sources, such as a
battery charger or an alternator, the electrical load shall be
connected to the battery directly. See Figure 7 for a typical
installation diagram. In this situation the battery is no longer
protected against too low battery voltages. Installation of
additional undervoltage protection circuits may be
necessary.
Figure 6: Load connected to the Load output on the Solar ChargeMaster
Battery temperature sensor
BATTERY
Load
Battery fuse
Load fuse
PV-array
External DC-switch
(see section 3.4)
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MPPT Solar ChargeMaster 25 – User and Installation Manual
11
Figure 7: Load connected directly to the battery
Above schematics are to illustrate the general placement of the Solar ChargeMaster in a circuit. They are not meant to provide
detailed wiring instructions for any particular electrical installation.
Battery temperature sensor
BATTERY
Load
Battery fuse
Load fuse
PV-array
External DC-switch
(see section 3.4)
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MPPT Solar ChargeMaster 25 – User and Installation Manual
4.6 THINGS YOU NEED
Make sure you have all the parts you need to install the
Solar ChargeMaster:
• Solar ChargeMaster (included);
• Battery temperature sensor with cable and plug
(included);
• DC cables to connect the Solar ChargeMaster; see
section 4.3 for specifications;
• DC-fuse holder with a DC-fuse, to be integrated in the
positive DC-cable to the battery; see section 4.3.
• Screws / bolts (Ø 4mm max.) (with plugs) to mount the
Solar ChargeMaster to a surface;
• Batteries;
• Appropriate and reliable cable terminals, strain reliefs,
battery terminals and boot lace ferrules.
We recommend as a minimum tool kit:
• Phillips screw driver nr.2 or flat blade screw driver 5 mm
to fix the DC-cables;
• Tools to fix the screws / bolts with plugs to mount the
Solar ChargeMaster to a surface.
4.7 CONNECTION
4.7.1 General
WARNING
Let installation work be done by a licensed
electrician.
All electrical systems must be disconnected
from any power source during the entire
installation!
CAUTION!
• Short circuiting or reversing DC polarity
may lead to damage to the Solar
ChargeMaster, the cabling and/or the
terminal connections.
• Follow all steps of the installation
instructions in order of succession as
described.
CAUTION!
Too-thin cables and/or loose connections
can cause dangerous overheating of the
cables and/or terminals. Therefore, tighten
all connections well, in order to limit
transition resistance as far as possible. Use
cables of the correct size. Use additional
strain reliefs to prevent the transmission of
stress to the screw connectors.
CAUTION!
The negative connections of the Solar
ChargeMaster are common and therefore
have the same electrical potential. If
grounding is required, always do this on the
negative wires. Use one grounding point
only.
Note: If the battery temperature remains within 15-25°C,
connection of the battery temperature sensor is
optional.
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MPPT Solar ChargeMaster 25 – User and Installation Manual
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4.7.2 Installation step by step
1
Mark the position of the four mounting spots.
Then fix the casing to the wall.
Figure 8
2
Fit boot lace ferrules to all DC-cables.
Connect the wiring of the Load-output (see
section 4.5). Integrate a fuse holder in the
positive load wire, but do not place the fuse
yet.
Figure 9
3
Connect the wiring to the battery.
Integrate a fuse holder in the positive battery
wire, but do not place the fuse yet.
Figure 10
4
Attach the battery temperature sensor to the
casing the battery.
Plug the temperature sensor cable into the
Temperature sensor jack.
Figure 11
5
Connect the PV array
WARNING
Risk of shock! When the PV array is
exposed to light, it supplies a dangerous
DC voltage. See section 4.4.
Figure 12
6
If grounding is required, connect the
grounding terminal to the central grounding
point of the electrical installation; see Figure
1, item 10.
See also section 4.7.1
Check all wiring: positive to +, negative to –.
See also Figures 6 and 7 for wiring
examples.
If OK, continue with section 4.8 for
commissioning of the Solar ChargeMaster.
7
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MPPT Solar ChargeMaster 25 – User and Installation Manual
4.8 COMMISSIONING AFTER INSTALLATION
4.8.1 Commissioning step-by-step
CAUTION!
Check the polarity of all wiring before
commissioning: positive connected to positive
(red cables), negative connected to negative
(black cables).
1 If all wiring is OK, place the DC-fuse between the Solar
ChargeMaster and the load.
2 Then place the DC-fuse between the Solar
ChargeMaster and the battery.
WARNING
When placing this fuse, a spark can occur,
caused by the capacitors used in the Solar
ChargeMaster. This is particularly dangerous in
places with insufficient ventilation, due to the
gassing of the batteries an explosion can occur.
Avoid having flammable materials close by.
3 The Solar ChargeMaster will initiate the charging
process if the voltage from the PV array is 5VDC higher
than the battery voltage; see chapter 3.
Note: If the Solar ChargeMaster does not switch on, press
the POWER switch for 1 second.
4.8.2 Battery type setting
The Solar ChargeMaster is suitable for charging the
following battery types: Flooded lead acid, AGM, Spiral,
Gel, Traction batteries and Mastervolt Li-Ion batteries (MLI).
WARNING
The MLI charging voltages on this charger fit
the Mastervolt Li-ion (MLI) batteries but do not
necessarily fit other Li-ion batteries! See also
section 4.9. Always follow the instructions
provided by the battery manufacturer!
CAUTION!
Invalid settings of the Solar ChargeMaster can
cause serious damage to your batteries and/or
the connected load! Adjustments of settings
may be undertaken by authorised personnel
only.
Note: If your Solar ChargeMaster is not new, you must
consider that former users may have changed the
settings.
The actual setting for Battery type is shown on the display
during normal operation mode. See Figure 13.
Indication
Battery type
01
Flooded
02
AGM
03
Gel
04
Traction
05
Mastervolt MLI (see section 4.9)
Figure 13: Battery type setting
To change the Battery type setting:
• Hold the POWER button (Figure 1) pressed until the
Battery type indication starts blinking;
• Press the POWER button shortly to scroll through the
Battery type settings as described above;
• Hold the POWER button pressed until the Battery type
indication stops blinking to confirm the desired setting.
When the POWER button is not touched for 10 seconds,
the Solar ChargeMaster will return to the normal operation
mode without changing a setting.
Page 15
MPPT Solar ChargeMaster 25 – User and Installation Manual
15
4.9 USE IN COMBINATION WITH MASTERVOLT MLI BATTERY
If the Solar ChargeMaster is used in combination with a
Mastervolt MLI Ultra type Li-ion battery, charging is stopped
if the MLI Ultra battery generates the Stop charge event.
Additional things you need:
• MasterBus Multipurpose Contact Output;
• Modular cable assembly (included in the delivery of the
Solar ChargeMaster).
Follow next additional steps to install the Solar
ChargeMaster in combination with a Mastervolt MLI type Liion battery (see Figure 14):
1 Do not use the battery temperature sensor. Instead
plug the loose provided modular cable assembly into
the Temperature sensor jack;
2 Connect the other side of this cable assembly to the
Multipurpose Contact Output as indicated;
3 Connect the DC main wiring and other components as
indicated;
4 Connect the MasterBus cabling between the devices
as indicated;
5 Add a MasterBus control panel to the MasterBus
network;
6 Configure the following Stop Charge event at the Li-ion
battery:
Configuration
Event 1 (obligatory)
Event source
Stop Charge
Event target
INT DC Relay
Event command
Activate
Event data
Copy
7 Adjust setting for Battery type to Mastervolt MLI (see
section 4.8.2);
8 Continue with the “Commissioning” section in the
manual of the MLI Ultra battery.
Li-ion battery
Loads
Battery fuse in positive battery line
DC positive cable
Safety relay
DC negative cable
MasterBus Multipurpose Contact Output via modular cable assembly
connected to the Solar ChargeMaster
MasterBus cable
MasterBus terminator
Figure 14: Use of the Solar ChargeMaster in combination with a Mastervolt MLI Ultra battery
Page 16
16
MPPT Solar ChargeMaster 25 – User and Installation Manual
4.10 SOFTWARE VERSION
To check the version of the installed software:
• Hold the POWER button (Figure 1) pressed until the
Battery type indication starts blinking;
• The version of the installed software is shown at the
right upper side of the display (Figure 15);
• After 10 seconds the Solar ChargeMaster returns to the
normal operation mode.
Battery type (blinking)
Software version
Figure 15: Software version
4.11 DECOMMISSIONING
To put the Solar ChargeMaster out of operation, follow
these instructions in order of succession:
1 Switch off all loads that are connected to the Solar
ChargeMaster;
2 Disconnect the PV array by switching off the switch
between the PV-array and the Solar ChargeMaster (or
protect the PV-array from light exposure, e.g. by
covering the PV modules);
3 Remove the DC-fuse between the Solar ChargeMaster
and the battery;
4 Remove the DC-fuse between the Solar ChargeMaster
and the load;
5 Check with a suitable voltage meter whether the
Battery connection and the LOAD output of the Solar
ChargeMaster are voltage free;
6 Disconnect the negative cable to the PV array from the
terminal block of the Solar ChargeMaster. Isolate the
core of the wire with insulating tape;
7 Do the same for the positive cable to the PV array;
8 Disconnect all other remaining wiring.
Now the Solar ChargeMaster can be demounted in a safe
way.
4.12 STORAGE AND TRANSPORTATION
When not installed, store the Solar ChargeMaster in the
original packing, in a dry and dust free environment.
Always use the original packing for transportation. Contact
your local Mastervolt Service Centre for further details if you
want to return the apparatus for repair.
4.13 RE-INSTALLATION
To reinstall the Solar ChargeMaster, follow the instructions
as described in this chapter (chapter 4).
Page 17
MPPT Solar ChargeMaster 25 – User and Installation Manual
17
5 TROUBLE SHOOTING
If you cannot solve a problem with the aid of this chapter, contact your local Mastervolt Service Centre. See
www.mastervolt.com/technical-support. Make sure you have the following information present if you must contact your local
Mastervolt Service Center to solve a problem:
• Article and serial number; see section 2.7.
• Software version; see section 4.10.
Malfunction
Possible cause
What to do
No output voltage
and/or current
Solar ChargeMaster was switched off due
to a previous fault situation
Press POWER-button for one second to switch on
the Solar ChargeMaster again
Check section 3.6 for an overview of fault indications of the LEDs and the LCD display
Display shows
OVERLOAD or error
code E1, E2, E3, E4,
F0, F1 or F2
Check section 3.6 for an overview of fault indications of the LEDs and the LCD display
Fault indicator LED
illuminated
Check section 3.6 for an overview of fault indications of the LEDs and the LCD display
Audible alarm active
Press POWER switch for 1 second to mute the alarm. Check section 3.6 for an overview of fault
indications of the LEDs and the LCD display
No display
The Solar ChargeMaster is in sleep mode
Press the POWER switch shortly to activate the
display
Output voltage too low,
charger supplies
maximum current
Load that is connected to the batteries is
larger than charger can supply.
Reduce load taken from the batteries.
Batteries not 100% charged
Measure battery voltage. After some time, this will
be higher.
Wrong battery type setting
Check settings (see section 4.8.2).
Charge current too low
Batteries almost fully charged
Nothing, this is normal when the battery is almost
fully charged.
High ambient temperature
Nothing; if ambient temperature is above 40°C /
104°F the charge current is automatically reduced.
Low irradiation on the PV-array.
Check PV-array, check for shading.
Battery not fully
charged
Current to load is too high
Reduce load taken from the batteries.
Charge time too short
Use an additional battery charger
Battery temperature too low
Use the battery temperature sensor.
Defective or worn-out battery
Check battery and replace if necessary.
Wrong battery type setting
Check settings (see section 4.8.2).
Battery is discharged
too fast
Battery capacity reduced due to sulphation
or due to plate corrosion
Charge and recharge a few times, this might help.
Check battery and replace if necessary.
Batteries are too warm,
gassing
Defective battery (short circuit in cell)
Check battery and replace if necessary.
Battery temperature too high
Use the battery temperature sensor.
Wrong battery type setting
Check settings (see section 4.8.2).
Page 18
18
MPPT Solar ChargeMaster 25 – User and Installation Manual
6 TECHNICAL DATA
6.1 SPECIFICATIONS
Model
MPPT Solar ChargeMaster 25
Article no.
131902500
Nominal battery voltage (U
NOM
)
12V and 24 V (Auto detection)
PV-INPUT
@ U
NOM
= 12V
@ U
NOM
= 24V
Maximum connected PV power
360Wp
720Wp
Maximum input PV power*
300W
600W
Full power voltage MPPT range
15 V ~ 66 V
30 V ~ 66 V
Absolute maximum PV Voltage
75VDC
75VDC
MPP tracking
Yes, integrated MPP tracker
Start-up voltage:
Battery voltage + 3VDC
Maximum PV input current
18ADC
EU efficiency
>97%
Peak static power conversion efficiency
>98%
Static MPPT efficiency
>99%
BATTERY OUTPUT
@ U
NOM
= 12V
@ U
NOM
= 24V
Maximum charge current (I
MAX
)
25 A
25 A
Charge voltage, Absorption:
14.25V (Traction: 14.45V)
28.5V (Traction: 28.9V)
Charge voltage, Float;
13.25V
(AGM, gel: 13.8V, MLI: 13.5V)
26.5V
(AGM, gel: 27.6V, MLI: 27.0V)
Battery temperature compensation
–30 mV/°C
–60 mV/°C
DC consumption (at night):
5mA
5mA
DC consumption (on, no charging):
<110mA
<80mA
Charge algorithm:
Three step (Bulk, Absorption, Float)
Battery types**:
Flooded, AGM, Gel, Traction, Mastervolt MLI.
LOAD OUTPUT
@ U
NOM
= 12V
@ U
NOM
= 24V
Maximum output current
25 A, max 36A peak for 1 sec.
25 A, max 36A peak for 1 sec.
Under voltage disconnect
10.5V
21.0V
Under voltage reconnect
11.0V
22.0V
GENERAL
Galvanic isolation between PV and battery
No, common negative conductor
Dimensions in mm [inch] (h x w x d):
135 x 190 x 73 mm [5.3 x 7.5 x 2.9 inch]; see also section 6.2
Weight:
1 kg
Operating Temperature Range
–20°C ≤ T
AMB
≤ +55°C [–4°F ≤ T
AMB
≤ 131°F]
Full Power Temperature range
–20°C ≤ T
AMB
≤ +40°C [–4°F ≤ T
AMB
≤ 104°F] (no power de-rating)
Non-operating Temperature range
–40°C ≤ T
AMB
≤ +75°C [–4°F ≤ T
AMB
≤ 167°F] (storage temperature)
Relative Humidity
5% to 95% non-condensing
Protection degree
IP23
MasterBus connectivity
No
Terminals:
Screw terminals, max. wire size 10mm2
* Automatic limitation of input power; excessive power will not be converted
** Refer to section 4.8.2 for battery type settings.
Specifications are subject to change without prior notice.
Page 19
MPPT Solar ChargeMaster 25 – User and Installation Manual
19
6.2 DIMENSIONS
Figure 16: Dimensions of the Solar ChargeMaster in mm [inches]
Page 20
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