Įkroviklis Mass 24/50-2

The Mastervolt Mass 24/50-2 is a professional battery charger designed for the most demanding marine and mobile environments. It delivers a 50A charging current at 24V and uses a three-stage automatic charging process to ensure fast and safe recharging of your battery banks.

This model has two separate outputs:

A primary 50A output dedicated to charging the house battery bank. A secondary 3A output specifically for maintaining the starting battery.

The Mass 24/50-2 charger is highly versatile. It is fully compatible with the following battery technologies:

Flooded lead-acidGelAGMLithium-ion

This charger has an IP23 protection rating. This means it is protected against solid objects larger than 12.5 mm and against rainwater at angles up to 60° from the vertical, making it suitable for indoor installation in a marine environment.

Installation must meet several criteria for optimal operation:

It must be mounted vertically, with the connection cables facing downward.The space must be well-ventilated and protected from excessive moisture.It must never be installed directly above batteries to avoid corrosive gas emissions.

Yes, the charger is supplied as standard with a temperature sensor featuring a 6-metre cable. This sensor automatically adjusts the charging voltage based on battery temperature, optimising battery lifespan.

Yes, it is fully compatible with the MasterBus communication network. This allows you to configure, monitor, and control the charger centrally from a compatible display. A MasterBus terminator is also included in the box.

The charger operates on a standard 230V AC power supply, with a frequency range of 50 to 60 Hz.

The charger features advanced thermal protection. If the ambient temperature exceeds 40°C, the device automatically reduces its charging power (derating) to protect its internal electronic components and prevent overheating.

No, it is strongly advised against installing the charger in the same enclosed compartment as the batteries. Lead-acid batteries generate potentially explosive and corrosive gases during charging, which could damage the charger's electronics.

The charger alone has a net weight of 4.6 kg. With its full packaging, the total weight is approximately 6.8 kg.

To ensure sufficient airflow and proper cooling, it is essential to leave at least 10 cm of free space all around the charger.

The front panel of the charger is equipped with LED indicators. These lights show the real-time operating status of the device and the current phase of the charging process (Bulk, Absorption, Float).

The 3-step+ process is an automatic charging algorithm developed by Mastervolt. It consists of three main phases:

Bulk: Fast charge at maximum current.Absorption: Full charge at constant voltage.Float: Maintenance voltage to keep the battery at 100% without damaging it.

The charger is designed to be permanently connected to AC and DC electrical systems. Its installation and wiring must be carried out by a qualified technician or electrician, in compliance with local regulations.

The charger uses an active ventilation system to cool its internal components. The fan may produce a slight noise when operating at full power, but its speed automatically adjusts to the cooling needs of the device.

Yes, grounding is mandatory for safety reasons. The charger must be connected to a ground conductor via the dedicated terminal on the AC input to prevent electric shock hazards.

Upon receiving your product, the box contains the following items:

The Mass 24/50 battery chargerA temperature sensor with 6 meters of cableA MasterBus terminatorThe user and installation manual