The Mastervolt ChargeMaster Plus 80A 24V is a compact, high-performance multi-charger designed for modern boats and mobile power systems. It powers multiple battery banks with two outputs, built‑in DC‑DC conversion, and smart communication for safer, smarter charging wherever you are.
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Dual-output design: Primary high‑current output plus a secondary output tailored for auxiliary batteries, enabling fast, safe charging of multiple banks without extra hardware.
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Broad battery compatibility: Charges Lithium Ion, Gel, and AGM chemistries and supports large or small bank configurations; accommodates up to 2 battery outlets and 280–700 Ah total capacity.
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Integrated power management: Built‑in DC‑DC converter, current limiter and a VSR to reduce wiring and simplify installation.
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Global charging performance: Wide input range of 80–275 V AC (35–70 Hz) with a best‑in‑class 3‑step+ charging method that adapts to battery chemistry for longevity and efficiency.
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Smart communication: MasterBus, CZone and NMEA compatibility enables seamless communication with displays, shunts and power systems (including FireCan and CANopen networks).
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Protection and efficiency: Safe Charge with rapid State of Charge recognition; 14.4 V boost and up to 80% charging power at high temperatures (up to 60 °C).
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Easy installation: Compact footprint, sturdy connections, LED status indicators for all outputs, and an intuitive setup that reduces install time.
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Rugged, marine-grade design: CE, ABYC, UL, SAE, CEC and RCM/C‑Tick compliant; designed for marine and mobile environments with robust reliability.
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Physical specs: Dimensions 15.1 x 9.8 x 5.0 inches; weight 13.9 lb; two battery outlets; nominal 24 V output with a secondary 14.25/28.5 V (12/24 V) option.
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All-in-one solution: Replaces auxiliary chargers, battery isolators and VSRs to simplify your electrical system while delivering fast, safe charging for multiple chemistries from a single device.
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Battery’s Best Friend architecture: Ensures compatibility across sizes, chemistries and voltages, while MasterBus, CZone and NMEA communication enables real‑time monitoring and control from displays and power systems.
This charger is designed to optimize charging across marine, RV, and other mobile power needs. With its dual outputs, smart chemistry adaptation, and integrated management features, it helps extend battery life, reduce wiring complexity, and provide reliable power wherever your adventures take you.
| Communication & monitoring |
| Communication interfaces |
MasterBus, CZone, NMEA |
| General specifications |
| Nominal output voltage |
24v |
| Secondary output voltage |
14.25 /28.5 V (12/24 V) |
| Secondary output current |
15 A at 12 V / 20 A at 24 V (adjustable) |
| Max. charge current per output |
80A |
| Max. AC current (230 V / 120 V) |
11.75 A / 23 A |
| Total charge current |
80 A at 28.8 V |
| Number of battery outlets |
2 (max.) |
| Battery capacity range |
280-700 Ah |
| Nominal input voltage |
120/230 V (80-275 V) 50/60 Hz |
| AC connection |
screw terminals, suitable up to up to 6 mm |
| Power supply mode |
Yes |
| Display/read-out |
LED |
| Dimensions, hxwxd |
15.1 x 9.8 x 5.0 inch |
| Weight |
13.9lbs |
| Weight |
CE, ABYC, UL1236, SAE J1171, ISO 8846, CEC/DOE, RCM/C-Tick |
| Technical specifications |
| Charge characteristic |
IUoUo, automatic / 3-step+ for Gel/AGM/flooded/Lithium Ion + user defined option |
| Temperature compensation |
-60 mV/°C / -76 mV/°F; incl. temperature sensor |
| DC voltage compensation |
yes, by means of automatic compensation or MasterShunt |
| Power consumption (DC side) |
< 2 mA (MasterBus off) |
| Current Control function |
Yes, through MasterBus or Czone |
| Power factor control |
yes, > 0,98 |
| Temperature range (ambient temp.) |
-13 °F to 176 °F |
| Cooling |
vario fan |
| Protection degree |
IP23, vertical mounting |
| Protections |
over-temperature, overload, short circuit, high/low battery voltage, ignition protection |
| Charger Status Interface (alarm contact) |
yes, using a Multipurpose Contact Output (code 77030500) |
