Mastervolt ChargeMaster Plus 12/75-3 Czone is an all-in-one marine battery charging powerhouse designed for boats and mobile power systems. It combines a high-efficiency charger, a DC-DC converter, a current limiter, and a built‑in VSR in a single compact unit, simplifying wiring and installation while delivering dependable, safe charging on the move.
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Nominal output voltage: 12 V
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Max. charge current per output: 75 A
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Total charge current: 75 A at 14.4 V
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Number of battery outlets: 3 (max.)
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Battery capacity range: 320–800 Ah
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Nominal input voltage: 120/230 V (80–275 V) 50/60 Hz
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AC connection: screw terminals, up to 6 mm
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Power supply mode: Yes
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Display/read-out: LED display
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Dimensions: 15.1 x 9.8 x 5.0 inch
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Weight: 13.0 lb
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Approvals: CE, ABYC, UL1236, SAE J1171, ISO 8846, CEC, RCM/C‑Tick
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Communication interfaces: MasterBus, CZone, NMEA
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3‑step+ charging with Safe Charge: fast and safe charging that recognizes State of Charge to extend battery life
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Built‑in VSR: directs alternator energy efficiently to the batteries, reducing components and overall system cost
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Battery’s Best Friend architecture: supports Li‑ion, Gel, AGM and other chemistries and voltages for versatile marine use
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Operational power supply mode: can serve as a stable power source for delicate electronics or during boat construction
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Integrated communications: MasterBus, CZone, and NMEA interfaces enable seamless monitoring and control with displays, shunts, and power systems across multiple networks
The ChargeMaster Plus is built to simplify power management on the water. With three outputs, it can simultaneously nurture multiple battery banks while monitoring and communicating across popular marine networks. Its broad input range ensures operation across global destinations, and the Safe Charge algorithm helps maximize battery life by adapting to the State of Charge. A compact 13 lb chassis with robust marine approvals keeps installation straightforward without compromising reliability, while the wide compatibility with Li‑ion, Gel, and AGM chemistries offers flexibility as your energy needs evolve.
| Communication & monitoring |
| Communication interfaces |
MasterBus, CZone, NMEA |
| General specifications |
| Nominal output voltage |
12v |
| Max. charge current per output |
75A |
| Smart In-/Output output voltage |
12v |
| Smart In-/Output output current |
Smart In-/Output output current |
| Smart In-/Output input current |
max. 40 A |
| Max. AC current (230 V / 120 V) |
6.5 A / 13 A |
| Total charge current |
75 A at 14.4 V |
| Number of battery outlets |
3 (max.) |
| Battery capacity range |
320-800 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 display |
| Dimensions, hxwxd |
15.1 x 9.8 x 5.0 inch |
| Weight |
13.0 lb |
| Approvals |
CE, ABYC, UL1236, SAE J1171, ISO 8846, CEC, RCM/C-Tick |
| Technical specifications |
| Charge characteristic |
IUoUo, automatic / 3-traps+ voor Gel/AGM/nat/Lithium Ion + een door de gebruiker gedefinieerde optie |
| Temperature compensation |
-30 mV/°C / -17 mV/°F; temperature sensor included |
| DC voltage compensation |
through MasterShunt |
| Power consumption (DC side) |
< 2 mA (MasterBus off) |
| Current Control function |
yes, through MasterBus |
| Power factor control |
> 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) |