Mastervolt ChargeMaster Plus 40A 24v Output 120/230V Input C-Zone MasterBus NMEA

The Mastervolt ChargeMaster Plus 40A 24V is the ultimate multi‑charger for serious marine power systems. Building on Mastervolt’s proven Battery’s Best Friend architecture, this compact unit integrates multiple charging functions into one robust device. With MasterBus, CZone and NMEA communication, it delivers smart, connected charging that’s easy to install and simple to operate.

Why choose ChargeMaster Plus

• Two outputs with integrated control—one output and an in/output channel, plus a DC-DC converter, current limiter and a built‑in VSR. This lets you manage power intelligently across multiple batteries and alternators.
• High versatility for any chemistry—designed to combine Lithium Ion, Gel or AGM batteries and support large or small battery banks on a single charger.
• Charge three batteries simultaneously—even when you’re underway, so your critical systems stay powered and ready.
• Efficient, safe charging—the fast 3‑step+ charging method plus Safe Charge quickly determines the State of Charge to extend battery life and optimize performance.
• World‑class compatibility—wide AC input range (80–275 V, 35–70 Hz) and 24 V nominal output with 40 A per output capability, plus MasterBus, CZone and NMEA communications for seamless integration with displays, shunts and power management systems.
• Simplified system architecture—replaces auxiliary chargers, battery isolators and VSR, reducing wiring, cost and installation time while improving reliability.
• Rugged, marine‑ready design—built to withstand harsh environments and compliant with CE, ABYC, UL, SAE, CEC and RCM/C‑Tick standards.

With the ChargeMaster Plus, you gain a powerful, compact charger that handles worldwide voltages, protects your investment with intelligent charging, and communicates across MasterBus, CZone and NMEA. It’s the perfect single solution for charging multiple batteries safely and efficiently, while delivering space‑saving convenience and effortless installation.

Key specifications

• Communication & monitoring: MasterBus, CZone, NMEA
• Nominal output voltage: 24 V
• Max. charge current per output: 40 A
• Smart In-/Output: 12 or 24 V; 5–10 A at 12 V; 5–20 A at 24 V (adjustable)
• Max. AC current (input): 6.8 A at 230 V / 13.5 A at 120 V
• Total charge current: 40 A at 28.8 V
• Number of battery outlets: 3 (max)
• Battery capacity range: 160–400 Ah
• Nominal input voltage: 120/230 V (80–275 V), 50/60 Hz
• AC connection: screw terminals, up to 6 mm
• Dimensions (H × W × D): 15.1 × 9.8 × 5.0 in
• Weight: 13.0 lb
• Approvals: CE, ABYC, UL1236, SAE J1171, ISO 8846, CEC, RCM/C‑Tick

Designed for versatility, reliability and ease of use, the ChargeMaster Plus is the next generation in battery charging. It delivers safe, fast charging for various battery chemistries, supports multiple power systems, and provides a straightforward path to a cleaner, more efficient marine electrical setup.