Mastervolt Mass 24/75 - 120 V Battery Charger

The Mastervolt Mass 24/75 battery charger accepts a nominal input voltage of 120 V AC (with a range of 90-130 V) at 50/60 Hz. It provides a nominal output voltage of 24 V DC.

This Mastervolt Mass 24/75 battery charger can supply a total charge current of 75 A at a voltage of 28.5 V.

The Mastervolt Mass 24/75 charger is designed to optimize the charging of Gel, AGM, flooded (wet), and Lithium Ion batteries.

The charger uses an automatic IUoUo 3-stage charging characteristic for optimal battery charging.

Yes, this charger includes a temperature sensor for automatic DC voltage compensation, ensuring charging is adapted to ambient conditions.

The recommended battery capacity for this charger is 80 to 1000 Ah or more.

Yes, the Mastervolt Mass 24/75 battery charger is specifically designed for demanding marine applications, both professional and recreational, providing reliable power even in extreme conditions.

Yes, battery chargers are standard-equipped with a second 3 A charge output to maintain a small secondary battery, such as a starting battery. The maximum current of this second output comes from the main output.

This charger complies with CE, ABYC A-31, RRR, and RMRS standards and certifications.

Yes, the charger is compatible with the MasterBus system. Each MasterBus device has two data ports to form a local data network.

Default charge voltages at 25°C are 28.5 V in Bulk and Absorption. Float voltage is 26.5 V for flooded batteries and 27.6 V for Gel/AGM batteries. Equalization voltage is 31.00 V.

The charger can operate in an ambient temperature range of 0 to 60°C (output power is reduced above 40°C). Humidity must be 0–95% with no condensation.

The Mass charger should be installed in a well-ventilated space protected from rain, snow, splashes, steam, bilge water, moisture, and dust.

The minimum recommended toolkit includes a 13 mm socket wrench for securing DC input cables (battery), a Phillips screwdriver for opening the charger’s connection area, and a 2 mm flathead screwdriver for the sensing terminal.

The dimensions of the Mastervolt Mass 24/75 charger are 420 x 318 x 130 mm (height x width x depth).

To connect the AC input to an external power source (such as a shore power connection or a generator), use an AC cable. The wires must be connected as follows: brown or black to the live (L1), blue to the neutral (N), and green/yellow to the ground (PE/GND).

If you use a battery isolator to charge multiple battery banks from a single output, a voltage drop of 0.6 Volt may occur. This drop can be compensated by enabling DIP-switch 4 (Diode enabled) on the charger.

Yes, the charger has DIP switches for adjusting certain parameters. For example, DIP switch 3 can increase the Float voltage to 27.6 V for certain Gel/AGM batteries requiring a higher voltage. There is also a "Traction" and "Force Float" setting.

No, this specific model (40120756) is a Mastervolt Mass 24/75 charger designed for a 120V AC input. For 230V AC power, a different charger model from the Mastervolt Mass range would be required.