The Mastervolt ChargeMaster Plus 24/30-3 is a versatile 24 V battery charger designed for demanding marine and mobile power systems. It delivers up to 30 A of charging current and can power two to three battery banks, whether used as a standalone unit or integrated into a Mastervolt network with MasterBus, CZone, or NMEA2000.
-
Nominal output voltage: 24 V (output 1 & 2)
-
Max. output current: 30 A (primary output)
-
Total charge current: 30 A at 28,5 V
-
AC input & current: Nominal input 120/230 V (80-275 V) 50/60 Hz; Max AC current 4.2 A / 8.6 A
-
Battery outlets: 3 (max.)
-
Battery bank size: 120-240 Ah
-
Power supply mode: Yes
-
Galvanic isolation: Yes
-
Display/read-out: LED display
-
Dimensions & weight: 11.5 x 8.3 x 4.1 inches; 5.5 lb
-
Communication interfaces: MasterBus, CZone, NMEA2000
-
Charge characteristic: IUoUo, automatic / 3-step+ for Gel/AGM/flooded/Lithium Ion + user defined option
-
Temperature compensation: -30 mV/°C / -17 mV/°F; temperature sensor included
-
DC voltage compensation: Yes, via automatic compensation or MasterShunt
-
Power factor control: > 0.98
-
Li-ion readiness: Lithium Ion battery profile supported and communicates with Mastervolt Lithium Ion batteries, MasterShunt, or system displays for real-time adjustments
-
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
-
Rugged performance: designed to withstand high temperatures and voltage fluctuations, ideal for harsh maritime or mobile environments
-
Certifications: CE, CEC, DOE, ABYC, UL1236, cULus, SAE J1171, ISO 8846, ACMA
-
Protection & mounting: IP23 protection; vertical mounting
Projects and daily use benefit from charging two or three battery banks quickly and safely, whether dockside or on the move. Its flexible charging profiles and broad compatibility with Gel, AGM, flooded lead-acid, and Lithium Ion batteries help extend battery life and reduce downtime. Seamless integration with MasterVolt ecosystems and smart safety features—like galvanic isolation and premium power factor—keep systems reliable and energized with minimal complexity.
| General 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 inch |
| Weight |
5.5 lb |
| Compliance |
CE, CEC, DOE, ABYC, UL1236, cULus, SAE J1171, ISO 8846, ACMA |
| Communication interfaces |
MasterBus, CZone, NMEA2000 |
| Technical specifications |
| Charge characteristic |
IUoUo, automatic / 3-step+ for Gel/AGM/flooded/Lithium Ion + user defined option |
| Temperature compensation |
-30 mV/°C / -17 mV/°F; temperature sensor included |
| DC voltage compensation |
Yes, via automatic compensation or MasterShunt |
| Power consumption (DC side) |
yes, through MasterBus or Czone |
| Current Control function |
yes, through MasterBus |
| Power factor control |
> 0.98 |
| Temperature range (ambient temp.) |
-25 °C to 80 °C, derating < 0 °C and > 40 °C |
| Cooling |
vario fan |
| Protection degree |
IP23, vertical mounting |
| Protections |
over-temperature, overload, short circuit, high/low battery voltageover-temperature, overload, short circuit, high/low battery voltage, ignition protection |
| MasterBus compatible |
yes |
| Charger Status Interface (alarm contact) |
yes, using a Multipurpose Contact Output (code 77030500) |
