Mastervolt
Mastervolt ChargeMaster Plus 24/80-2
Pickup available at Mercury Yacht Harbour
Usually ready in 2-4 days
Description
The ChargeMaster Plus 24/80-2 is a powerful 24 V battery charger that integrates several functions into one device, replacing auxiliary chargers, battery isolators and a VSR to simplify the installation and reduce cost. Built on the 'Battery's Best Friend' architecture, it charges Lithium Ion, Gel, AGM and flooded batteries with the fast and safe 3-step+ method, delivering up to 80 A across two outputs and suiting battery banks of 280-700 Ah. Smart features include Revival mode for fully depleted batteries, Priority Charge that directs power to the lowest battery, and multi-voltage charging of a 12 V starter battery within a 24 V system.
With a very wide 80-275 V AC operating range and strong tolerance for high temperatures and voltage fluctuations, it keeps working in harsh marine and mobile environments. Native MasterBus, CZone and NMEA 2000 communication lets it integrate fully into modern onboard systems, displaying the charge phase of each output and even acting as a power supply for sensitive equipment.
PRODUCT DETAILS
- Powerful 24 V multi-charger with two outputs and a current limiter
- Delivers up to 80 A total at 28.8 V for battery banks of 280-700 Ah
- Battery's Best Friend architecture charges Lithium Ion, Gel, AGM and flooded via 3-step+
- Revival mode automatically revives even fully depleted batteries
- Priority Charge redirects available power to the lowest battery for faster charging
- Multi voltage capability charges a 12 V starter battery in a 24 V system
- Native MasterBus, CZone and NMEA 2000 communication for full system integration
- 20% more output at 28.8 V and 80% charging power at 60 °C
- Very wide 80-275 V AC operating range with galvanic isolation
- ChargeMaster Plus battery charger
- Battery temperature sensor
- Mounting bracket and fixing material
- User and installation manual
No exploded diagram available for this product.
No compatible transducers listed for this product.

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Communication & monitoring
| Communication interfaces | MasterBus, CZone, NMEA 2000 |
General specifications
| Nominal output voltage | 24 V |
| Secondary output voltage | 14.25 /28.5 V (12/24 V) |
| Max. output current primary output | 80 A |
| Max. output current secondary output | 5-15 A at 12 V / 5-20 A at 24 V (adjustable) |
| Total charge current | 80 A at 28.8 V |
| Max. AC current (230 V / 120 V) | 11.75 A / 23 A |
| Number of battery outlets | 2 (max.) |
| Battery bank size | 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 mm² |
| Power supply mode | yes |
| Galvanic isolation | yes |
| Display/read-out | LED |
| Dimensions, hxwxd | 384 x 250 x 127 mm |
| Weight | 6.3 kg |
| Compliance | CE, ABYC, UL1236, SAE J1171, ISO 8846, CEC/DOE, RCM/C-Tick, RRR |
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 | through 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.) | -25 °C to 80 °C, derating > 40 |
| 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) |




