MAAS 24-50-2 Fully Automatic Battery Charger

Product Information: Mass Charger

Specifications:

• Models: MASS 24/50-2; 24/50 3ph; 24/75; 24/75 (120V); 24/100;
  24/100 3ph; 48/25; 48/50

• Type: Fully automatic battery charger

• Manufacturer: Mastervolt

• Website: www.mastervolt.com

Product Usage Instructions:

1. General Information

Before using the Mass Charger, it is important to familiarize
yourself with the information provided in this manual.

1.1 Use of this Manual

This manual serves as a guide for the installation and operation
of the Mass Charger. Please read it carefully before
proceeding.

1.2 Validity of this Manual

Ensure that you are referring to the most recent version of this
manual for accurate information.

1.3 Liability

The manufacturer holds no liability for damage caused by
improper use or installation of the product.

1.4 Identification Label

Check the identification label on the product to ensure it
matches the model specified in this manual.

1.5 Correct Disposal of this Product

Follow local regulations for the proper disposal of the Mass
Charger when it reaches the end of its lifecycle.

FAQ:

Q: What should I do if the Mass Charger does not turn on?

A: Check the power source and connections to ensure everything
is properly set up. Refer to the troubleshooting section in the
manual for further guidance.

Q: Can I leave the batteries connected to the Mass Charger

indefinitely?

A: It is recommended to follow the charging guidelines provided
in the manual to prevent overcharging and potential damage to the
batteries.

Mass Charger
MASS 24/50-2; 24/50 3ph; 24/75; 24/75 (120V); 24/100; 24/100 3ph; 48/25; 48/50
FULLY AUTOMATIC BATTERY CHARGER
USER AND INSTALLATION MANUAL
EN For the latest version of this manual, visit our website: NL Ga om deze handleiding in andere talen te downloaden naar onze website: DE Um diese Anleitung in anderen Sprachen herunterzuladen, besuchen Sie bitte unsere Website: FR Pour télécharger ce manuel dans d’autres langues, consultez notre site Web : ES Para descargar este manual en otros idiomas, visite nuestro sitio web: IT Per scaricare questo manuale in altre lingue, visitare la pagina del prodotto sul nostro sito Web:
www.mastervolt.com In case of any discrepancy in the interpretation of different language versions, the English version shall prevail.

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Mass 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

TABLE OF CONTENTS
1 GENERAL INFORMATION …………………………………. 3 1.1 Use of this manual ………………………………………. 3 1.2 Validity of this manual………………………………….. 3 1.3 Liability………………………………………………………. 3 1.4 Identification label ……………………………………….. 3 1.5 Correct disposal of this product …………………….. 3
2 SAFETY INSTRUCTIONS …………………………………… 4 2.1 General……………………………………………………… 4 2.2 Explosive gases………………………………………….. 4 2.3 Warnings regarding the use of batteries …………. 4 2.4 Warning regarding life support applications …….. 5 2.5 Warranty ……………………………………………………. 5
3 INSTALLATION…………………………………………………. 6 3.1 Location …………………………………………………….. 6 3.2 Connections……………………………………………….. 6 3.3 Wiring 6 3.3.1 AC wiring …………………………………………. 6 3.3.2 AC safety grounding ………………………….. 6 3.3.3 DC wiring…………………………………………. 7 3.3.4 Connection of main batteries………………. 7 3.4 Battery capacity ………………………………………….. 7 3.5 Battery isolator……………………………………………. 7 3.6 Connection of second battery (3A output) ………. 7 3.7 Temperature sensor ……………………………………. 7 3.8 Voltage sense …………………………………………….. 8 3.9 Alarm function…………………………………………….. 8 3.9.1 Standard alarm mode ………………………… 8 3.9.2 DC alarm mode ………………………………… 8 3.10 RJ12 splitter for enclosure C2 ………………………. 8 3.11 Overview connection compartment ……………….. 9

3.12 Materials……………………………………………………..9 3.13 Connection ………………………………………………..10 3.14 Installation step-by-step……………………………….11 3.15 Commissioning after installation ……………………12
3.15.1 General …………………………………………..12 3.15.2 MasterBus ……………………………………….12 3.16 Decommissioning ……………………………………….12 3.17 Storage and transportation …………………………..12
4 DIP SWITCH SETTINGS…………………………………….13 4.1 DIP switch operation …………………………………..13 4.2 DIP switch functions ……………………………………13
5 OPERATION …………………………………………………….14 5.1 Introduction………………………………………………..14 5.2 Switching on/off ………………………………………….14 5.3 The 3-step+ charge process…………………………14 5.4 Reset the Mass Charger………………………………14 5.5 Equalize mode……………………………………………14 5.6 LED indicators ……………………………………………14
6 MASTERBUS ……………………………………………………15 6.1 About MasterBus………………………………………..15 6.2 How to set up a MasterBus network ………………15 6.3 MasterBus Settings …………………………………….15 6.4 Event based commands ………………………………17
7 TROUBLE SHOOTING ………………………………………18
8 TECHNICAL DATA ……………………………………………19 8.1 Specifications …………………………………………….19 8.2 Dimensions………………………………………………..21 8.3 Characteristics……………………………………………22

Mass 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

3

1 GENERAL INFORMATION

1.1 Use of this manual
This manual contains important safety and operating instructions for the safe and effective operation, maintenance and possible correction of minor malfunctions of the Mass Charger. It is therefore obligatory that every person who works on or with this product is completely familiar with the contents of this manual, and that he/she carefully follows the instructions and important safety instructions contained herein.

1.2 Validity of this manual
All the specifications, provisions and instructions contained in this manual apply solely to standard versions of the Mass Charger.

This manual is valid for the following models, in combination with firmware version 7.7.0 or higher:

Product code 40020506
42020506 40030506 40020756
42020756 40120756
42120756 40021006
42021006 40031006 40040256 40040506

Model
Mass 24/50-2 230V/50-60Hz DNV-GL Mass 24/50-2 230V/50-60Hz Mass 24/50 400V 3 phase Mass 24/75 230V/50-60Hz DNV-GL Mass 24/75 230V/50-60Hz Mass 24/75 120V/60-50Hz DNV-GL Mass 24/75 120V/60-50Hz Mass 24/100 230V/50-60Hz DNV-GL Mass 24/100 230V/50-60Hz Mass 24/100 400V 3 phase Mass 48/25 230V/50-60Hz Mass 48/50 230V/50-60Hz

Enclosure type C2
C2 C3 C3
C3 C3
C3 C3
C3 C3 C2 C3

These models are further mentioned as “Mass Charger”.
Mastervolt offers a wide range of products for your electrical installation. For an extensive overview of all our products, please visit our website www.mastervolt.com.

1.3 Liability Mastervolt can accept no liability for: · Consequential damage due to use of the Mass Charger. · Use that is inconsistent with the purpose of the product. · Possible errors in the manuals and their results.

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. 1.4 Identification label The following picture is only an example!
CERTIFICATES
Part number Serial number K201R0010 with device version “R” Figure 1. Identification label The identification label is located at the right-hand side of the Mass Charger. Important technical information required for service and maintenance can be derived from the identification label.
CAUTION! Never remove the identification label. This will void the warranty.
1.5 Correct disposal of this product This product is designed and manufactured with high quality materials and components, which can be recycled and reused. Please be informed about the local separate collection system for electrical and electronic products. Please act according to your local rules and do not dispose of your old products with your normal household waste.

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Mass 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

2 SAFETY INSTRUCTIONS

Read the entire manual before using the Mass Charger. Keep this manual in a secure place.

WARNING! This chapter describes important safety and operating instructions for use of a Mass Charger in residential, recreational vehicle (RV) and marine applications.
2.1 General
1 To reduce the risk of electric shock ­ Do not expose Mass Charger 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 Mass Charger in a non-ventilated room, overheating may result.
2 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.
3 The Mass Charger is designed to be permanently connected to an AC and DC electrical system. Installation of, and work on the Mass Charger, may be carried out only by a qualified, authorised and trained technician or electrician, consistent with the locally applicable standards and regulations.
4 Make sure that all wiring is properly installed and in good electrical condition; and that wire size is large enough for AC current rating of the Mass Charger. Check the wiring on a regular base, at least once a year. Do not use the Mass Charger when the wiring is undersized or damaged.
5 Do not operate the Mass Charger if it has received a sharp blow, been dropped, or otherwise damaged in any way; take it to qualified personnel.
6 Except for the connection compartment (see section Overview connection compartment3.11 on page 9), the Mass Charger may not be opened or disassembled. There are no serviceable parts inside the cabinet. Take it to qualified, authorized and trained service personnel when service or repair is required. Incorrect reassembly may result in a risk of electric shock or fire. Only qualified, electrician installers are authorized to open the connection compartment.
7 To reduce risk of electric shock, disconnect the Mass Charger from both AC and DC electrical system before attempting any maintenance or cleaning. Turning off controls will not reduce this risk.
8 The Mass Charger must be provided with an equipment-grounding conductor to the AC input ground terminal. Grounding and all other wiring must comply with local codes and ordinances.

9 Short circuiting or reversing polarity will lead to serious damage to batteries, Mass Charger, wiring as well as accessories. Fuses cannot prevent damage caused by reversed polarity and the warranty will be void.
10 In case of fire, you must use the fire extinguisher which is appropriate for electrical equipment.
11 If applied in a marine application in the United States, external connections to the Mass Charger shall comply with the United States Coast Guard Electrical Regulations (33CFR183, Sub part I).
2.2 Explosive gases
1 WARNING: risk of explosive gases. Working in vicinity of a lead-acid battery is dangerous. Batteries generate explosive gases during normal battery operation. For this reason, it is of utmost importance that each time before using the Mass Charger, you read this manual and follow the instructions exactly.
2 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.
3 DANGER: To reduce the risk of explosion ­ Never use the Mass Charger in situations where there is danger of gas or dust explosion or an area in which ignitionprotected equipment is required.
2.3 Warnings regarding the use of batteries
1 Someone should be within range of your voice or close enough to come to your aid when you work near a leadacid 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 a battery or engine.
6 Do not short circuit batteries, as this may result in explosion and fire hazard! Be extra cautious to reduce risk of dropping a metal tool onto a battery. It might spark or short-circuit battery or other electrical part and may cause explosion.
7 Remove personal metal items such as rings, bracelets, necklaces, and watches when working with a battery.

Mass 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

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A battery can produce a short-circuit current high enough to weld a ring or the like to metal, causing a severe burn. 8 Only use the Mass Charger for charging Lead-acid, NiCad and Li-ion batteries and the supply of users attached to these batteries, in permanent systems. Do not use the Mass Charger for charging dry-cell batteries that are commonly used with home appliances. These batteries may burst and cause injury to persons and damage to property. 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 the grounded terminal from the battery first. Make sure all accessories are off, so as not to cause an arc. 12 Be sure that the area around the battery is well ventilated while the battery is being charged. Refer to the recommendations of the battery manufacturer. 13 Batteries are heavy! It may become a projectile if it is involved in an accident! Ensure adequate and secure mounting and always use suitable handling equipment for transportation. 14 Study all battery manufacturer’s specific precautions while charging and recommended rates of charge. Note that the Mass Charger charge specifications are based on Mastervolt batteries. Specifications for a given chemistry of a different manufacturer may vary. If connecting batteries of a different manufacturer,

make sure the manufacturer’s recommendations are met.
2.4 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. In addition 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.
2.5 Warranty The Mastervolt product warranty covers the Mass Charger 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.

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Mass Charger 12/75-3, 12/100-3, 24/40-3, 24/60-3 ­ User and Installation Manual

3 INSTALLATION
During installation and commissioning of the Mass Charger, the important safety instructions are applicable at all times. See chapter 2 on page 4.
Please check the contents of the box before you start with the installation. The contents of the box need to be: · the Mass battery charger; · battery temperature sensor (incl. 6m cable); · a MasterBus terminator; · the user manual. If one of these items is missing, please contact your Mastervolt dealer.
3.1 Location Choosing a location to install: · Install the Mass Charger in a well-ventilated room
protected against rain, snow, spray, vapour, bilge, moisture and dust. · Ambient temperature: 0…60°C/32°F…140°F; (power derating above 40°C/104°F to decrease the internal heat sink temperature). · Humidity: 0-95% non- condensing. · Never use the Mass Charger at a location where there is danger of gas or dust explosions · Mount the Mass Charger in such a way that obstruction of the airflow through the ventilation openings is prevented. No objects must be located within 10cm/4inch around the Mass Charger. · Mount the Mass Charger vertically, with the connecting cables downwards. · Do not install the Mass Charger in the same compartment as the batteries. Do not mount the Mass Charger straight above the batteries because of possible corrosive sulphur fumes.
3.2 Connections Before making the connection between the battery charger and the system, be sure that the AC and DC system are switched off. Remove the fuses to protect yourself against unexpected start up.
3.3 Wiring CAUTION!
The wire and fuse sizes stated in this manual are given as example only. Prescribed wire and fuse sizes may be different due to local applicable regulations and standards.

3.3.1 AC wiring
Check if the voltage of your mains source or generator corresponds with the AC input voltage of the battery charger as mentioned on the type number plate. See section 1.4 on page 3.
It is important that the green/ yellow earth wire is ± 1 cm (0.4 inch) longer than the other wires. By accidentally pulling at the cable, the earth wire stays connected to the Mass Charger longer which offers additional safety.
For a safe installation the correct wire cross section must be applied. Do not use a cross section that is smaller than indicated. See the following table to select the appropriate cross section for the AC wiring (up to 6m/20ft length):

AC Current 6-12A 12-20A 20-32A

Minimum cross section:

1.5mm²

14AWG

2.5mm²

12AWG

4.0mm²

10AWG

Connection of AC wiring and recommended colours

· 230V [120V] installations:

Wire colour

Meaning

Must be connected to:

Brown or black [black]

Phase

L1

Blue [white]

Neutral N

Green/yellow [green]

Earth

PE/GND

· 400V installations (Mass 24/50 3ph & 24/100 3ph):

Wire colour

Meaning

Must be connected to:

Brown/black/grey

Phase

L1, L2, L3

Green/yellow

Earth

PE/GND

3.3.2

AC safety grounding WARNING!
The ground wire offers protection only if the cabinet of the Mass Charger is connected to the safety ground. Connect the ground terminal (PE/GND) to the hull or the chassis.
CAUTION!
For safe installation it is necessary to insert an RCD (Residual Current Device; earth leakage switch) in the AC input circuit of the Mass Charger.

Mass 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

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3.3.3 DC wiring
Keep the cable connection between charger and batteries as short as possible. If available, use coloured battery cables. If this is not possible, mark the plus and the minus cables with coloured insulating tape (e.g. red for plus and blue/black for minus). Use the following diameters:

Mass Charger Mass 24/50-2 MB Mass 24/50 3ph MB Mass 24/75 MB Mass 24/75 (120V) MB Mass 24/100 MB Mass 24/100 3ph MB Mass 48/25 MB Mass 48/50 MB

Length <3 m 25mm² 25mm² 25mm² 25mm² 35mm² 35mm² 10mm² 25mm²

Length 3-6 m 35mm² 35mm² 35mm² 35mm² 50mm² 50mm² 16mm² 35mm²

3.3.4 Connection of main batteries
1 Pull the cables through the cable glands of the Mass Charger.
2 Crimp on ring terminals to the cable: · ring M6 for 24/50-2, 48/25; · ring M8 for 24/75, 24/75 (120V), 24/100, 48/50, 24/50 3ph and 24/100 3ph.
3 Connect the cables to the terminals of the Mass Charger. Pay attention to the polarity, positive on positive/negative on negative.
4 Integrate a suitable fuse (charger fuse) in the positive cable. When using a DC distribution with fuses, no additional fuse is necessary.
5 Cut the cables to length and crimp on the ring terminals. Connect the cable to the DC distribution or batteries. CAUTION!
Reversing the positive and negative battery poles will severely damage the Mass Charger.
Lay the positive and negative cables next to each other to limit the electromagnetic field around the cables. The negative 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 hull or chassis frame as the negative conductor.

3.4 Battery capacity Always follow the instructions published by the battery manufacturer.

Mass Charger Mass 24/50-2 Mass 24/50 3ph Mass 24/75 Mass 24/75 (120V) Mass 24/100 Mass 24/100 3ph Mass 48/25 Mass 48/50

Recommended battery capacity
100Ah ­ 500Ah 100Ah ­ 500Ah 150Ah ­ 750Ah 150Ah ­ 750Ah 200Ah ­ 1000Ah 200Ah ­ 1000Ah
50Ah ­ 250Ah 100Ah ­ 500Ah

3.5 Battery isolator If one or more batteries or battery sets must be charged at the same time via one output, a battery isolator should be used. This isolates the different battery sets to prevent one discharging the other. Mastervolt offers several Battery Isolators. Please refer to www.mastervolt.com .
A battery isolator causes a voltage drop of 0.6V. This can be compensated in two ways:
· By changing DIP switch 4 to On (Diode enabled); · By using the voltage sense function (see section 3.8 on
page 8);
CAUTION! Never use both methods. Your batteries will be overcharged and severely damaged!
If you use a `voltage drop free’ battery isolator, like the Mastervolt Battery Mate, no compensation is needed.
For a proper installation, see the connection diagram that comes with the battery isolator.
3.6 Connection of second battery (3A output) The Mass 24/50-2 MB is standard equipped with a second charge output which can be used to give a maintenance charge to a small second battery set like a starter battery. The maximum charge current of the second output is 3A, which comes from the main output.
· Use 2.5 to 4mm2 cable for the connection. · Connect the minus of the second battery to the minus of
the main battery. · Connect the plus of the second battery to the +3A
terminal of the Mass Charger (Figure 3 and Figure 4). · Integrate a 10A slow blow fuse in the plus cable.
3.7 Temperature sensor The standard temperature sensor is provided with 6m cable and a double-sided tape for easy installation. 1. Make sure that the side of the battery that you want to
place the sensor, is clean and grease-free. 2. Remove the piece of paper from the tape and stick the
sensor on the battery. 3. Plug the modular cable into the terminal at the right of
the Mass Charger (see Figure 3 on page 9). For the C3 enclosure (refer to specifications) both “RS232” and “analog” are suitable. It is not necessary to shorten the cable. When you want to shorten it anyway, please notice the polarity of the plug and use the old connector as an example. Now when the battery temperature is low, the charge voltage increases and when the battery temperature is high, the charge voltage is decreased. This prevents overcharge, and gassing, which increases the battery’s lifetime substantially.

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Mass Charger 12/75-3, 12/100-3, 24/40-3, 24/60-3 ­ User and Installation Manual

Charge voltage (V)

Battery temperature (°C)
Figure 2. Temperature compensated charging
3.8 Voltage sense If required, DC cable losses can be compensated by using the sense function. This will shorten the charge time. 1. Use 0,75mm2, preferably red and black wire and
secure these with fuses of 2A slow blow. 2. Connect the wires with the two upper terminals of the
green connector at the right side of the cabinet (see Figure 3 on page 9). Pay extra attention to the polarity of the wires, red on +S and black on -S. 3. Now connect the other side of the wires: black on the minus of the battery and red on the plus of the battery.

3.9 Alarm function To control external equipment, the charger is equipped with a potential free contacts alarm relay; see Figure 3 on page 9. The alarm function has two modes: standard (factory setting) and DC alarm mode (continuous mode). The maximum switch current of the relay is 1A. Exceeding the setpoints will activate the alarm (see page 16).
3.9.1 Standard alarm mode In this mode the relay responds to all fault conditions that the Mass Charger can detect such as: no AC input voltage, low DC voltage, temperature sense failure.
3.9.2 DC alarm mode To enable this mode, a DIP switch setting needs to be changed (switch 1 and 2 at ON). The alarm now works as a DC alarm and responds to the battery voltage only.
Note: In the DC alarm mode the electronics stay active permanently and drain a very small current of ±25mA, also when the Mass Charger is switched off.
3.10 RJ12 splitter for enclosure C2 The RJ12 connector (QRS232 communication port) can be used to connect the battery temperature sensor or the remote panel (not included). Use a RJ12-splitter to connect both at the same time (not included).

Mass 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

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3.11 Overview connection compartment

C2 ENCLOSURE

1 Screw terminals AC input: L1, N, PE (models 24/50 3ph and 24/100 3ph: L1, L2, L3, PE)
2 Earth stud 3 MasterBus connector 4 MasterBus connector 5 Output (battery) positive connector
(maximum 3A) 6 RS232/Temperature sensor connector 7 Analog/Temperature sensor connector 8 Output (battery) positive connector 9 Output (battery) negative connector 10 Voltage sense/ potential free alarm
contact

C3 ENCLOSURE

Figure 3. Overview connections Mass Charger

3.12 Materials Make sure you have all the parts you need to install the Mass Charger:

Product

Quantity

Mass Charger (included)

1

Battery temperature sensor with cable and plug (included)

1

DC cable to connect the positive DC connection (+) of the Mass Charger to the positive pole of the DC

1

distribution; for specifications see section 3.3.3 on page 6

DC cable to connect the negative DC connection (­) of the Mass Charger to the negative pole of the DC

1

distribution; for specifications see section 3.3.3 on page 6

DC fuse holder with a DC fuse, to be integrated in the positive DC cable

1

Screws/bolts (Ø 6mm) (with plugs) to mount the cabinet to a surface. Use mounting materials which are

4

suitable to carry the weight of the Mass Charger

AC cable* to connect the AC input to an external power source (e.g. a shore connection or a generator set)

1

Batteries. See section 3.4 on page 7 for recommended capacity

X

Appropriate and reliable cable terminals, cable lugs, battery terminals and cord end terminals

X

• Double insulated three-wire cable with wire colours according to the locally applicable regulations. The applicable length and wire diameter depend on the electrical installation (see section 3.3.1 on page 6).

We recommend as a minimum tool kit: · Socket wrench 13mm to fix the DC input (battery) cables · Flat blade screwdriver 1.0 x 4.0mm to fix the screw terminals · Tools to fix the screws/bolts (Ø 6mm) with plugs to mount the cabinets to a surface · Philips screwdriver to open the connection area of the Mass Charger · 2mm flat blade screwdriver for the sense terminal (see Figure 3, point 10).

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Mass Charger 12/75-3, 12/100-3, 24/40-3, 24/60-3 ­ User and Installation Manual

3.13 Connection

WARNING!
Let installation work be done by a licensed electrician. Before beginning with the connection of the wiring, make the AC distribution as well as the DC distribution voltage free.
Note: If the battery temperature remains within 15-25°C, the battery temperature sensor is optional.

Note:

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.
The Mass Charger supports MasterBus and RS 232 compatible remote control panels.

The following schematic illustrates the general placement of the Mass Charger. It is not meant to provide detailed wiring instructions for any particular electrical installation.

RCD L N
PE/GND

Battery fuse

Charger fuse
Battery fuse

BATTERY BANK 1 (main battery bank)
Figure 4. Installation drawing of the Mass Charger

BATTERY BANK 2
Temperature sensor

Mass 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

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3.14 Installation step-by-step

1

Mark the position of the mounting spots using the drilling dimensions.

2 Place the four screws first and hang the Mass Charger over them. Then fix the Mass to the wall by securing the screws.

7 Attach the battery temperature sensor to the casing of the main battery bank. Plug the temperature sensor cable into the “Temp.Sensor” jack. See also Figure 3 on page 9.

3

Open the connection compartment by loosening the two screws.

4
Feed the AC wiring through the cable gland and connect the wiring to the screw terminals. Tighten the cable gland firmly.

5

Connect the DC cabling of the house bank, positive to +, negative to ­ .

+­

+­

6

Option for model 24/50:

Connect the DC wiring of the second battery bank (max. 3A). This bank has a common negative with the main battery.

7

Option: Connect the Mass Charger to the

MasterBus network.

8

The factory setting of the Mass Charger is

optimal for most installations. Sometimes

however, it is desirable to change these

settings. See chapter 4 (page 13) and

section 6.3 (page 15).

9

Check all wiring. If everything is all right,

close the connection compartment by fixing

the two screws.

10 Continue with section 3.15 for commissioning of the Mass Charger.

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Mass 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

3.15 Commissioning after installation Note: When your Mass Charger is not new, you have to
consider that former users may have changed the settings. Reset the Mass Charger to factory settings when there is any doubt (see section 6.3 on page 15).
3.15.1 General The factory settings of the Mass Charger are optimal for most installations. With some applications however, it is desirable to change these settings. Therefore, several adjustments can be made. See chapters 4 and 6.3.
Note: The DIP switches must be adjusted prior to commissioning. All other settings can only be configured after commissioning.
CAUTION! Check the polarity of all wiring before commissioning: positive connected to positive (red cables), negative connected to negative (black cables).
If all wiring is OK, place the DC fuse(s) of the DC distribution to connect the batteries to the Mass Charger.
WARNING! When placing this fuse, a spark can occur, caused by the capacitors used in the Mass Charger.
Now the Mass Charger is ready for operation. After switching on the AC power supply the Mass Charger will initiate the charging process.

3.15.2 MasterBus
Adjustment of the settings of the Mass Charger can be made by means of DIP switches or via the MasterBus network (by means of an USB interface connected to a PC with MasterAdjust software). Some settings can only be changed via the MasterBus interface. See section 6.3 on page 15 for an overview of all available MasterBus settings.
3.16 Decommissioning If it is necessary to put the Mass Charger out of operation, follow the instructions in order of succession as described below: 1 Switch the Mass Charger to OFF. 2 Remove the DC fuse(s) of the DC distribution and/or
disconnect the batteries. 3 Remove the AC fuse(s) of the AC input and/or
disconnect the AC mains. 4 Open the connection compartment of the Mass
Charger. 5 Check with a suitable voltage meter whether the inputs
and the outputs of the Mass Charger are voltage free. 6 Disconnect all wiring.
Now the Mass Charger can be demounted in a safe way.
3.17 Storage and transportation When not installed, store the Mass Charger in the original packing, in a dry and dust free environment.
Always use the original packing for transportation. Contact your local Mastervolt dealer for further details if you want to return the apparatus for repair.

Mass 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

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4 DIP SWITCH SETTINGS
The Mass Charger settings can be adjusted in two ways: · By means of DIP switches; · Via the MasterBus network (using a remote control
panel or the Mastervolt USB interface connected to a PC with MasterAdjust software); see chapter 6. Note: Once a DIP switch has been set to On, MasterBus
presets are disabled but people can still change the settings!
CAUTION! Invalid settings of the Mass Charger can cause serious damage to your batteries and/or the connected load! Adjustments of settings may be undertaken by qualified personnel only!
4.1 DIP switch operation The Mass Charger has six DIP switches. These switches are operated by flipping the levers to the other position, using a small screwdriver.
Figure 5. DIP switches 4.2 DIP switch functions See the table for the functional overview of the DIP switches (DIP switch 6 is reserved for future use). See page 16 for an overview of charging specifications. · Force Float (DIP switch 1)
For special applications a fixed charge voltage can be required. The battery charger allows you to change the 3-step+ charge program to a single stage program by activating the function “Force Float”, switching DIP switch 1 to “ON”. The charge voltage will be fixed at 26.5V (24V charger) or 53V for a 48V charger. · Traction setting (DIP switch 2) Setting for traction charging: +0.7/1.4V during bulk and +0.4/0.8V in absorption for 24/48V batteries. · Gel/AGM batteries (DIP switch 3) Some Gel/AGM batteries need a higher float voltage for optimal charge. Changing the float voltage can be done by setting DIP switch 3 to “ON”. The float voltage will increase to 27.6V (24V charger) or 55.2V for a 48V charger.

· Diode setting (DIP switch 4) Setting for +0.6V voltage compensation in case a battery isolator is used.
· Lithium-ion setting (DIP switch 5) With firmware version 7.7.0 or higher, the settings for charging an MLI Ultra can be selected.

DIP SWITCH 5 4 3 2 1 Controlled by MasterAdjust 0 0 0 0 0
ForceFloat 0 0 0 0 1 ContMon 0 0 0 1 1 Diode 0 1 0 0 0
ForceFloat + Diode 0 1 0 0 1 ContMon + Diode 0 1 0 1 1 Flooded 1 0 1 0 0
ForceFloat + Flooded 1 0 1 0 1 ContMon + Flooded 1 0 1 1 0 Diode + Flooded 1 1 1 0 0
ForceFloat + Diode + Flooded 1 1 1 0 1 ContMon + Diode + Flooded 1 1 1 1 0 Gel/AGM 0 0 1 0 0 ForceFloat + Gel/AGM 0 0 1 0 1 ContMon + Gel/AGM 0 0 1 1 1 Diode + Gel/AGM 0 1 1 0 0
ForceFloat + Diode + Gel/AGM 0 1 1 0 1 ContMon + Diode + Gel/AGM 0 1 1 1 1 Traction 0 0 0 1 0 ContMon + Traction 0 0 1 1 0 Diode + Traction 0 1 0 1 0 ContMon + Diode + Traction 0 1 1 1 0 Lithium-ion 1 0 0 0 0 ForceFloat + Lithium-ion 1 0 0 0 1 ContMon + Lithium-ion 1 0 0 1 1 Diode + Lithium-ion 1 1 0 0 0 1 = On; 0 = Off

ForceFloat: One step charge program with fixed float voltage.
ContMon: Continuous monitor mode. MasterBus, RS232 and DC alarm stay functioning at mains failure. Remote stays functioning if it has its own power source.

Diode:

Diode compensation on (+0.6V)

14

Mass 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

5 OPERATION
5.1 Introduction The Mass charger is a fully automatic, high efficiency battery charger/rectifier. The Mass Charger not only charges batteries rapidly and safely, it supplies the connected consumers at the same time. In addition, the Mass Charger is secured against short circuit, overload and high temperatures in an industrial environment.
5.2 Switching on/off Activate the Mass Charger by switching the main switch to the ON position. When no error is present, the charger LED illuminates green and the Mass Charger starts charging.
Move the switch to the OFF position to switch off the Mass Charger!
5.3 The 3-step+ charge process The Mass charger is equipped with an intelligent 3-step+ charge characteristic which takes care of an optimal charge of your batteries. See Figure 6 and Figure 9 (page 22) for more details.

Incorrect use of the equalize mode may lead to hazardous situations. During equalizing the batteries are brought into the gas state and permitted load voltages may be exceeded (refer to Figure 10 on page 23 for characteristics). For these reasons the equalizing mode should only be used by trained technical engineers. The equalizing mode can only be started when the Mass Charger is in float operation. To start the equalize mode, select Equalize in the MasterBus device settings (see section 6.3 on page 15).
5.6 LED indicators

13

5

12

4

11

3

10

2

9

1

8

7 6

Figure 6. the 3-step+ charge process.
5.4 Reset the Mass Charger Set the main switch to off. Switch on again.
The Mass Charger automatically resumes operation in Bulk stage after it was disconnected from an AC source.
5.5 Equalize mode An equalizing charge can be necessary after very deep discharges and/or inadequate charges. This has to be carried out according to the specifications of the battery manufacturer.
WARNING! Equalization is ONLY applicable for flooded batteries and will damage Gel/AGM/Spiral type batteries!

Figure 7. Front panel of the battery charger
During normal operation the charger LED (6) is green.
When all charge process status LEDs (1 to 5) are on, the battery is fully charged. For details refer to Figure 9 on page 22.
1…5 Status LEDs charge process 6 Charger status LED: Green = on Off = off Red = fault condition:
+: Battery sense error +: Charger temperature too high +: Short circuit indication, charger will reduce
the charge current to 25%
+: DC error, DC voltage too low or too high +: Temperature sense error
7 Status LED MasterBus communication: Green = MasterBus communication Off = no MasterBus communication
8 Main or on/off switch
9…13 Status LEDs charge current

Mass Charger 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

15

6 MASTERBUS
6.1 About MasterBus All devices that are suitable for MasterBus are marked with the MasterBus symbol.
MasterBus is a CAN based, fully decentralized data network for communication between Mastervolt devices. MasterBus is used as power management system for all connected equipment, such as the inverter, battery charger, generator and many more. Every device that is compatible with MasterBus is equipped with two data ports. The devices are simply chained together, forming a local data network. Monitoring panels such as the EasyView 5 can be used for monitoring and control of all connected MasterBus equipment.

CAUTION! Never connect a non-MasterBus device to the MasterBus network directly! This will damage all connected MasterBus devices.
6.2 How to set up a MasterBus network
· Connections between the devices are made by standard straight MasterBus cables. Mastervolt can supply these cables.
· Up to 63 MasterBus devices can be connected together. · MasterBus needs a terminator on both ends of the
network. · The electric power for the network comes from the
connected devices according to the rule: 1 powering/3 non powering. · Do not make ring networks. · Do not make T-connections in the network.

6.3 MasterBus Settings

Meaning

Device

Language

Language that is displayed on a monitoring device connected to the MasterBus.

Name

Name for the Mass Charger.

Device

Device name recognized by MasterBus.

Battery name

Name for the main battery bank.

Factory settings

Option to reset the Mass Charger to default settings.

Presets

Diode compensate

Option for charger diode +0.6V voltage compensation. If it is enabled, the compensation value is adjustable.

Forced float

Option for Forced Float or constant voltage charging. If it is enabled, Forced Float voltage is adjustable.

Continuous mode Option to keep MasterBus powered by the battery when the Mass Charger is disabled.

Battery

The battery type settings are based on Mastervolt batteries. If connecting batteries of a different manufacturer, make sure the manufacturer’s recommendations are met. Should this not be the case, then “User defined” must be selected to change the settings.

Equalize

Option to enable Equalizing. Shows only when no other battery type has been selected.

WARNING!
Equalization is ONLY applicable for flooded batteries and will damage Gel/AGM/Spiral type batteries!

General

Max. current

Maximum charge current, adjustable model dependent.

Temp. compensate

Charge voltage compensation for temperature (V/°C).

Factory setting English CHG Mass+type Mass Charger House Bank
Disabled Disabled Disabled Flooded
(Max current) -0.060/-0.120V/°C

Adjustable range EN, NL, DE, FR, ES, IT, NO, SV, FI, DA 0-12 characters 0-16 characters
Disabled, Enabled: 0-2.50V Disabled, Enabled
Disabled, Enabled User defined, Gel/AGM, Flooded, Traction, NiCad, Lithium-ion
0 ­ Imax* -1.000 ­ 1.000V/°C

16

Mass 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

Meaning

Output reduction Output reduction that can be used as target event to adjust the maximum current.

Relay

Alarm set points

DC Alrm high on Alarm DC High on

DC Alrm high off Alarm DC High off

DC Alrm low on Alarm DC low on

DC Alrm low off Alarm DC low off

DC Alrm delay

Alarm delay time

Bulk

Bulk voltage

Bulk voltage

Max. bulk time

Maximum bulk timer

Min bulk time

Minimum bulk timer

Start bulk time

Voltage at which to start the bulk timer.

Bulk ret. volt.

Return to Bulk voltage

Bulk return time

Adjustable Return to Bulk time after the Return to Bulk voltage has been reached.

Absorption

Abs. voltage

Absorption voltage

Max absorption Maximum absorption timer

Min absorp. time Minimum absorption timer

Return amps

Return to Float current (in A)

Float

Float voltage

Float voltage

Equalize voltage Equalize voltage

Equalize time

Equalize time

• For a 48 V battery charger, multiply the voltages by two

Factory setting 0%
32.00V 30.00V 20.00V 22.00V 30 sec
28.50V 480 min 2 min 26.50V 25.60V 30 sec
28.50V 240 min 15 min 6.0 %I max
26.50V 31.00V* 360 min

Adjustable range 0-90%
16.00-32.00V 16.00-32.00V 16.00-32.00V 16.00-32.00V 0-255 sec
16.00-32.00V 0-600 min 0-600 min 16.00-32.00V 16.00-32.00V 0-255 sec
16.00-32.00V 0-600 min 0-180 min 0-25A
16.00-32.00V 16.00-32.00V 0-600 min

Note: the following charge specifications are based on Mastervolt batteries. Specifications for a given chemistry of a different manufacturer may vary. For a 48V charger, multiply the voltages by four.

Charging specifications
Bulk voltage Max bulk time Min bulk time Start bulk time at Return to bulk voltage Bulk return time Absorption voltage Max abs. time Min abs. time Return amps Float voltage * Depending on model

Flooded 28.50V / 57.00V 480 min 2 min 26.50V / 53.00V 25.60V / 51.20V 30 sec 28.50V / 57.00V 240 min 15 min 6.0%* Imax 26.50V / 53.00V

GEL/AGM 28.50V / 57.00V 480 min 2 min 26.50V / 53.00V 25.60V / 51.20V 30 sec 28.50V / 57.00V 240 min 15 min 6.0%* Imax 27.60V

Battery type Lithium-ion 28.50V / 57.00V 480 min 2 min 26.50V / 53.00V 26.50V / 53.00V 240 sec 28.50V / 57.00V 240 min 15 min 6.0%* Imax 27.00V / 54.00V

Traction 29.10V / 58.20V 480 min 2 min 26.50V / 53.00V 25.60V / 51.20V 30 sec 29.10V / 58.20V 240 min 15 min 6.0%* Imax 26.50V / 53.00V

NiCad 29.00V / 58.00V 480 min 2 min 26.50V / 53.00V 27.00V / 54.00V 30 sec 29.00V / 58.00V 240 min 240 min 6.0%* Imax 29.00V / 58.00V

Mass 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

17

6.4 Event based commands With MasterBus a device can be programmed to initiate an action at another connected device. This is done by means of eventbased commands.

Events

Field

Meaning

Factory setting Adjustable range

Event x source

Event-based command. Mass Charger event that should result in an action by another device on the MasterBus network.

Disabled

See Event source list.

Event x target

Select a connected MasterBus device that should take action due to a Mass Charger event.

Select…

Selectable targets are system dependent.

Event x command

Action to be taken by the target device.

Select…

See command list in selected device manual

Event x data

Data is linked to the command.

Off

On changes the status to On at the first signal.

Off changes the status to Off at the first signal.

Copy lets the status follow the input.

Copy Invert lets the status follow the opposite of the input

Toggle changes the status at the 1st signal and back at the 2nd signal. It is used in combination with a pulse switch.

Off, On, Copy, Copy Invert, Toggle.

Event x+1

The next event appears after enabling Event x.

Disabled

See Event x.

Mass Charger event source list (Mass Charger as event source)

Event source

Meaning

Charging

Mass Charger state is On

Bulk

Charge stage is Bulk

Absorption

Charge stage is Absorption

Float

Charge stage is Float

Failure

Charger failure MasterBus alarm

CSI

Charger Status Interface MasterBus alarm to generate an audible alarm at charger failure

Equalize

Mass Charger is in Equalize mode

TC Error

Battery temperature sensor error

Fan

MasterBus signal for an external fan to start (at 50% load/50°C)

LED Bulk

LED Bulk illuminates

LED 20-40

LED 2 illuminates (see Figure 7)

LED Abs

LED Abs illuminates

LED 60-80

LED 4 illuminates (see Figure 7)

LED Float

LED Float illuminates

LED Failure

LED Failure illuminates

Mass Charger event target list (Mass Charger as event target)

Event target

Meaning

Bulk

Command to start the Bulk stage of charge

Absorption

Command to start the Absorption stage of charge

Float

Command to start the Float stage of charge

On/ Standby

Command to switch on the Mass Charger

Output reduction

Command to reduce the output of the Mass Charger e.g. when set to 90%, max. current will be 10% when event is received

18

Mass 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

7 TROUBLE SHOOTING

In case of a failure, the Mass Charger display shows an error `code’ to help you find its source. See section 5.6 LED indicators, on page 14. If you cannot solve a problem using the following fault-finding table, contact your Mastervolt dealer. Make sure you have the part and serial number at hand (See section 1.4, on page 3).

Malfunction No output voltage and/or current
Output voltage too low, charger supplies maximum current Charge current too low
Batteries not fully charged
Batteries are discharged too fast Batteries are too warm, gassing

Possible cause No AC input. AC input voltage too low (< 180VAC). AC input frequency out of range. Load that is connected to the batteries is larger than charger can supply. Batteries not 100% charged.
Batteries almost fully charged.
High ambient temperature.
Low AC input voltage. At lower AC input voltages, the charge current is reduced. See Figure 8 on page 22. Charge current too low. Current to load is too high. Charge time too short. Battery temperature too low. Defective or old battery. Battery capacity reduced due to wastage or sulphation, stagnation. Defective battery (short circuit in cell). Battery temperature too high. Charge voltage too high.

What to do Check AC wiring, check remote control panel. Check input voltage, check generator. Check input voltage, check generator. Reduce load taken from the batteries.
Measure battery voltage. After some time, this will be higher. Nothing, this is normal when the battery is almost fully charged. Nothing; if ambient temperature is more than 40°C the charge current is automatically reduced. Check AC input voltage.
See “Charge current too low”. Reduce load taken from the batteries. Use a battery charger with higher capacity. Use the battery temperature sensor. Check battery and replace if necessary. Charge and recharge a few times, this might help. Check battery and replace if necessary. Check battery and replace if necessary. Use the battery temperature sensor. Check settings (see section 6.3 on page 15).

Mass 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

19

8 TECHNICAL DATA

8.1 Specifications

Model

Mass 24/50-2 Mass 24/50-2 Mass 24/75

DNV-GL

DNV-GL

Mass 24/75

Mass 24/75 (120V) DNV-GL

Mass 24/75 (120V)

Product code

40020506

42020506

40020756

42020756

40120756

42120756

INPUT

Mains voltage

230V, -10% + 15%

230V, -10% + 15%

120V, -10% + 15%

Frequency

50-60Hz ± 5Hz

50-60Hz ± 5Hz

60-50Hz ± 5Hz

Inrush current

None, the battery charger is equipped with a soft start in accordance with IEC 1003-3

Input current

7A

12A

25A

Power factor (Cos

1

1

1

phi)

Maximum efficiency 89%

89%

89%

Input power

1600W

2700W

2700W

OUTPUT

Nominal voltage

24VDC

24VDC

24VDC

Max charge current 50A

75A

75A

(Imax)*

Outputs

1 x 50A + 1 x 3A

1 x 75A

1 x 75A

Charge characteristic*

3-step+, fully automatic

Battery types:

Flooded lead acid, Gel/AGM lead acid, NiCad, Lithium-ion (Mastervolt MLI) (see section 6.3 for settings)

Default charge voltages at 25°C:

Absorption voltage* 28.5V

28.5V

28.5V

Float voltage*

26.5V

26.5V

26.5V

Voltage ripple

max. 100mV RMS with resistive load @ full power

Short circuit current (1/4 of Imax)

12.5A

18.75A

18.75A

Wire gauge (up to 3m 25mm² length)

25mm²

25mm²

Charger fuse

63A

80A

80A

(external)

ENVIRONMENTAL

Ambient temperature -20 to 40°C** @ 100% output power, derated with 2.5%/°C above 40°C

Cooling

Forced air, by means of a ventilator with variable speed

Humidity

Maximum 95%RV, non-condensing

MASTERBUS

MasterBus powering Yes

Yes

Yes

capability

MasterBus menu languages

English, Dutch, German, French, Spanish, Italian

ENCLOSURE TYPE C2

C3

C3

Dimensions (hxwxd)mm

See section 8.2 on page 21

Protection degree

IP23

IP23

IP23

Weight

5kg

9kg

9kg

COMPLIANCE

Standards, approvals & listings

CE, ABYC A-31, DNV GL, RRR, RMRS

CE, ABYC A-31, RRR, RMRS

CE, ABYC A-31, DNV GL, RRR, RMRS

CE, ABYC A-31, RRR, RMRS

CE, ABYC

CE, ABYC

A-31, DNV GL, A-31, RRR,

RRR, RMRS RMRS

• Adjustable, see chapter 4. ** The Mass 24/50-2 allows operation in ambient temperatures as high as 45°C. Specifications are subject to change without prior notice.

20

Mass 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

Model

Mass 24/100 Mass

DNV-GL

24/100

Mass 24/50 3ph

Mass 24/100 3ph

Mass 48/25

Mass 48/50

Product code

40021006

42021006 40030506

40031006

40040256

40040506

INPUT Mains voltage

230V, -10% + 15%

3 x 365…550V 3 x 365…550V**

230V, -10% + 230V, -10% +

15%

15%

Frequency

50-60Hz ± 5Hz

50-60Hz ± 5Hz

50-60Hz ± 5Hz 50-60Hz ± 5Hz

50-60Hz ± 5Hz

Inrush current

None, the battery charger is equipped with a soft start in accordance with IEC 1003-3

Current

16A

Power factor (Cos phi) 1

3.3A

6.5A

8A

16A

0.8

0.8

1

1

Efficiency Input power

89% 3600W

89% 1750W

89% 3500W

89% 1800W

89% 3600W

OUTPUT

Nominal voltage

24VDC

24VDC

24VDC

48VDC

Max charge current (Imax)*

100A

50A

100A

25A

Outputs

1 x 100A

1 x 50A

1 x 100A

1 x 25A

Charge characteristic* 3-step+, fully automatic

Battery types:

Flooded lead acid, Gel/AGM lead acid, NiCad, Lithium-ion (Mastervolt MLI) (see section 6.3 for settings)

Default charge voltages at 25°C:

48VDC 50A
1 x 50A

Absorption voltage*

28.5V

28.5V

28.5V

57V

57V

Float voltage* Voltage ripple Short circuit current (1/4 of Imax) Cable size (within 3 m)

26.5V

26.5V

26.5V

max. 100mV RMS with resistive load @ full power

25A

12.5A

25A

35mm²

25mm²

35mm²

53V 6A 10mm²

53V 12.5A 25mm²

Charger fuse (external) 125A

63A

125A

32A

63A

ENVIRONMENTAL Ambient temperature Cooling

-20 to 40°C @ 100% output power, derated with 2,5%/°C above 40°C Forced air, by means of a ventilator with variable speed

Humidity

Maximum 95%RV, non-condensing

MASTERBUS
MasterBus powering Yes capability

Yes

Yes

Yes

Yes

MasterBus menu languages

English, Dutch, German, French, Spanish, Italian

ENCLOSURE TYPE C3

C3

C3

Dimensions (hxwxd)mm

See section 8.2 on page 21

C2

C3

Protection degree Weight

IP23 9kg

IP23 10kg

IP23 10kg

IP23 5kg

IP23 9kg

COMPLIANCE
Standards, approvals & listings

CE, ABYC A-31, DNV GL, RRR, RMRS

CE, ABYC A-31, RRR, RMRS

CE, ABYC A-31, RRR, RMRS

CE, ABYC A-31, RRR, RMRS

CE, ABYC A-31, RRR, RMRS

CE, ABYC A-31, RRR, RMRS

• Adjustable, see chapter 4. ** For device versions up to J (see section 1.4 on page 3): 3x 365…440V Specifications are subject to change without prior notice.

Mass 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

21

8.2 Dimensions C2 enclosure (Mass 24/50 and 48/25)

C3 enclosure (other models)

22

Mass 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

8.3 Characteristics

Figure 8. Charge current versus input voltage

Figure 9. Charge characteristic of the 3-step+ charging method (at 25°C/77°F)

Mass 24/50, 24/75, 24/100, 48/25, 48/50 ­ User and Installation Manual

23

Figure 10. Charge characteristic of the equalize charge cycle (at 25°C/77°F)

Figure 11. Temperature compensation characteristic (charge voltage versus temperature)

We welcome your feedback and suggestions! Send feedback on this document to info@mastervolt.com

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Document version: 10000001888/05 (December 23) Copyright ©2023 Navico Group EMEA B.V. All rights reserved.

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