The Mastervolt ChargeMaster Plus 24/30-3 is a versatile battery charger engineered for demanding marine and mobile power systems. With a 24 V nominal output and up to 30 A of charging current, it powers two or three battery banks quickly and safely, whether used as a standalone unit or as part of a complete Mastervolt network.

Why choose ChargeMaster Plus

• Three outputs with automatic current distribution—each output can deliver the maximum current, enabling efficient multi-battery charging with intelligent balance.
• Pre-float technology eliminates the risk of overcharging smaller batteries by preventing premature float charging.
• Automatic current distribution adjusts charging based on the condition and size of each battery bank for optimal performance.
• Worldwide compatibility supports various mains voltages and frequencies, making it ideal for global installations.
• Compact, lightweight design is smaller and lighter than the previous model, reducing space and weight in tight installations.
• Standalone or integrated system use works as a plug-and-play charger or as part of a MasterBus/CZone/NMEA2000 system—simplifying setups and reducing costs.
• Battery’s Best Friend architecture enables charging of any battery chemistry with the fast and safe 3-step+ charging method, including a Li-ion profile.
• Li-ion readiness supports the Lithium Ion battery profile and communicates with Mastervolt Lithium Ion batteries, MasterShunt, or system displays for real-time adjustments.
• Rugged performance designed to withstand high temperatures and significant voltage fluctuations, ideal for harsh maritime or mobile environments.
• Extensive certifications including CE, ABYC, UL, cULus, SAE, CEC/DOE, ISO and ACMA, ensuring compliance and safety.

Key specifications

• Nominal output voltage (output 1 & 2): 24 V
• Max. output current (primary output): 30 A
• Total charge current: 30 A at 28.5 V
• Max. AC current (230 V / 120 V): 4.2 A / 8.6 A
• Number of battery outlets: 3 (max.)
• Battery bank size: 120-240 Ah
• Nominal input voltage: 120/230 V (80-275 V) 50/60 Hz
• Power supply mode: Yes
• Galvanic isolation: Yes
• Display/read-out: LED display
• Dimensions (HxWxD): 11.5 x 8.3 x 4.1 inches
• Weight: 5.5 lb
• Communication interfaces: MasterBus, CZone, NMEA2000
• Technical charging characteristic: IUoUo, aut

Upgrade to a smarter, safer, and more efficient charging solution with the Mastervolt ChargeMaster Plus. It delivers reliable performance, reduces system complexity, and keeps your batteries healthy across two or three banks—whether dockside or on the move.