Mastervolt Mass 24/25-2 25 Amp 24V Battery Charger

The Mass 24/25-2 is a 25 A, 24 V battery charger engineered for demanding professional, semi-professional, and recreational use. Designed for the toughest conditions, Mass chargers deliver faultless operation and round-the-clock output when required. Built on proven sustainability and technology, Mass units offer long service life and a reliable power supply in any task.

Key specifications

• Output: 25 A at 24 V DC
• MTBF: 180,000 hours at full capacity with 24/7 use
• Enclosure: lightweight stainless steel, anodized aluminum housing
• Protection: coating of internal components protects against dampness or condensation
• EMI tolerance: insensitive to electromagnetic effects from other devices
• Battery compatibility: suitable for every type of battery; can charge flat batteries
• Temperature sensor: included; full power up to ambient temperatures of 45°C
• Load capacity: 80–1000 Ah or more
• Power quality: stable, ripple-free supply, even without batteries
• Current Control: prevents fuse breakdown when voltage drops
• Parallel operation: can be paralleled with multiple chargers
• Networking: MasterBus compatible; single-cable connection for centralized/local/remote monitoring
• Lithium-ion charging: communicates directly with Li‑ion via MasterBus; adapted charging voltages
• GMDSS and certification: GMDSS compatible; GMDSS versions and remote panels available
• Certifications: CE, ABYC A-31, IEC 60945; RMRS and RRR (not applicable to 24/75 120 V); DNV GL (specific models: 24/25, 24/50, 24/75, 24/75 (120 V), 24/100)

Durability, installation and maintenance

• Rugged construction: resilient stainless steel and anodized aluminum casing with protective coatings for damp conditions; designed to withstand heavy vibrations and shocks
• Installation: connections in accordance with CE, ABYC A-31 and IEC60945; supports parallel switching; suitable for MasterBus networks
• Monitoring and control: optional front display with GMDSS remote panel on select models
• Operational limits: maintained performance up to 45°C ambient; temperature sensor aids safe operation

Mass 24/25-2 25 AMP 24V Battery Charger

The right choice for demanding conditions

Mass battery chargers are designed for the toughest conditions for professional, semi-professional, and recreational purposes. Even under the most extreme conditions, the products from the Mass series operate faultlessly, giving you round-the-clock output when necessary. The sustainability and technologies underpinning the Mass concept have long been proven. With an MTBF of 180,000 hours at full capacity and 24/7 use, the Mass products are ideal for the toughest tasks and any situation that requires a reliable power supply. 

Powerful selling points:

• Designed for the most difficult conditions.
• Lightweight, stainless steel, anodized aluminum casing.
• Coating of internal components prevents damage from dampness or condensation to ensure a longer lifespan.
• Insensitive to electromagnetic effects from other devices.
• Suitable for every type of battery, it also charges flat batteries.
• It is delivered as standard with a temperature sensor.
• Full power at temperatures of up to 45 degrees.
• Load capacities from 80 to 1000 Ah or more.
• Stable and ripple-free power supply, even without batteries. 
• The Current Control function prevents the breakdown of fuses when the voltage drops.
• Parallel switching is possible using multiple battery chargers.
• Connections in accordance with CE, ABYC A-31 and IEC60945.
• GMDSS models and panels available.
• Certified by RRR, RMRS (does not apply to 24/75 120 V).
• Certified by DNV GL (only 24/25, 24/50, 24/75, 24/75 (120 V), 24/100 models).

GMDSS Compatible

The Mass series are designed for the most demanding situations. To help you comply with SOLAS regulations, all Mass battery chargers are GMDSS compatible. GMDSS stands for Global Maritime Distress and Safety System and allows users to monitor various alarm functions. GMDSS versions of the Mass 24/25 DNV, Mass 24/50, Mass 24/75, Mass 24/100, and Mass 24/100-3ph are available.

A separate remote panel is available, which is compatible with all Mass battery chargers.

A single front display with GMDSS remote panel is available for:

• Mass 24/25-2 DNV
• Mass 24/50-2
• Mass 24/75, Mass 24/100, Mass 24/100-3ph

Charging Lithium Ion batteries

Although Lithium Ion batteries are increasingly popular, there can be a lack of clarity when it comes to the charging process. This is not a problem with Mastervolt as the Mastervolt battery chargers communicate directly with the Lithium Ion battery via the integrated MasterBus (or have been adapted to the required charging voltages).

MasterBus compatible

Mass battery chargers can be easily connected to a MasterBus network with only one cable and one connection. You can also choose central, local, or remote monitoring, configuration, and control of your system.

Made tough by smart design 

The certified Mass battery chargers are very strong and designed to withstand heavy vibrations and shocks. Their premium quality components meet the highest possible specifications, while the smart and extra robust mounting adds to the professional end result.

Specifications:

• Nominal output voltage: 24v
• Total charge current: 25a at 28.5v
• Number of battery outlets: 2
• Charge current second output: 2a
• Battery bank size: 50-250 ah
• Nominal input voltage: 230v (180-265v), 50/60 Hz
• Power supply mode: Yes
• Galvanic isolation: Yes
• Display/read-out: LED display

Specifications:

• Charger Input - Voltage: 230v
• Charger Output - Amps: 25a
• Charger Output Voltage: 24v
• Charging Banks: 2
• Portable: No
• Box Dimensions: 8"H x 14"W x 17"L WT: 11.65 lbs
• UPC: 816882020520