Mastervolt 24V ChargeMaster Plus 24/110-2 Mains Battery Charger

All-in-One Multi-Bank 24V Battery Management and AC Charging

Streamlined Power Architecture for Marine, Off-Grid, and Commercial Systems

The Mastervolt ChargeMaster Plus 24/110-2 is an advanced, heavy-duty 24V battery charger engineered to simplify complex electrical installations. Traditional multi-bank power systems often require separate auxiliary chargers, battery isolators, and Voltage Sensitive Relays (VSR) to manage housekeeping and starter banks simultaneously. This unit integrates those functions into a single, cohesive enclosure. By consolidating multiple components into one system, it reduces wiring complexity, saves installation space, and minimises potential points of failure in demanding marine, mobile, and industrial environments.

Equipped with two main outputs and a flexible third connection that acts as an input or output, this charger provides comprehensive management for up to three separate battery banks. Its multi-voltage functionality is particularly advantageous for larger vessels and heavy vehicles: within a primary 24V system, the unit can natively maintain and charge a 12V starter battery without requiring an external DC-DC converter.

Intelligent Charging for Mixed Battery Chemistries

Modern off-grid and marine electrical setups frequently combine different battery types, such as a Lithium-ion house bank paired with an AGM or Gel starter battery. Using Mastervolt's proven 3-step+ charging algorithm, the ChargeMaster Plus safely and rapidly charges any combination of Lithium-ion, Gel, and AGM chemistries simultaneously.

• Priority Charge Technology: Rather than dividing power equally when one bank is already full, the charger dynamically redirects available current to the most depleted battery for faster turnaround times.
• Smart Input Functionality: While underway, the configurable in/output port allows a single alternator to charge up to three separate battery banks, eliminating the need for external split-charge diodes or relays.
• Automatic Revival Mode: Safely attempts to recover and wake up deeply discharged or fully depleted batteries that standard chargers might fail to recognise.
• Integrated VSR and Current Limiter: Replaces external isolators and manages current flow smoothly between banks without voltage drop.
• Multi-Voltage Capability: Directly charges a 12V auxiliary or starter battery from a 24V primary charging system.

Engineered for Global AC Supplies and Harsh Environments

Shore power and remote generator outputs can be notoriously unstable, often fluctuating in voltage and frequency. This unit features a wide auto-ranging AC input (80V to 275V AC) and accommodates frequencies from 35Hz to 70Hz, allowing it to operate reliably on poor-quality marina shore power or portable generators anywhere in the world.

High ambient temperatures inside engine rooms, plant lockers, and equipment bays often cause standard chargers to throttle output severely or shut down prematurely. The ChargeMaster Plus is built for thermal resilience, maintaining up to 80% of its charging capacity even at ambient temperatures of 60°C. The durable enclosure includes a clear status display on the front panel, giving operators immediate visual feedback on charge phases and system health.

Ideal Applications

• Commercial and Recreational Marine: Managing 24V house banks alongside 12V or 24V thruster, generator, and main engine starter batteries.
• Heavy Transport and Speciality Vehicles: Maintaining auxiliary equipment batteries and starter systems in mobile command units, trucks, and coaches.
• Industrial Off-Grid Power: Reliable AC-to-DC charging from backup generators in remote telecommunications or monitoring stations.

Upgrade Your 24V Charging System

Consolidate your electrical setup and protect your battery investment with the Mastervolt ChargeMaster Plus 24/110-2. Add this unit to your system today for coordinated, multi-chemistry charging across all your battery banks.