Mastervolt
Mastervolt ChargeMaster Plus 12/35-3
Pickup available at Mercury Yacht Harbour
Usually ready in 2-4 days
Description
The ChargeMaster Plus 12/35-3 is an all-in-one battery charger that delivers efficient, reliable charging in the harshest marine and mobile environments. Built on Mastervolt's 'Battery's Best Friend' architecture, it uses the fast and safe 3-step+ charging method to suit gel, AGM, flooded and lithium ion batteries, with a user-defined profile for anything else.
Three outputs share a total of 35A at 14.25V, and automatic current distribution sends charge where each battery bank needs it most. Pre-float functionality lets you combine batteries of different sizes without risk of overcharging the smaller ones. Compatible with mains voltages and frequencies worldwide, the unit runs as a plug-and-play standalone charger or integrates fully into a MasterBus or CZone network.
Improved cooling keeps noise low across the full power range, while a compact, lightweight casing and broad temperature tolerance make installation straightforward aboard any vessel.
PRODUCT DETAILS
- 12V output with 35A total charge current across up to three battery outputs
- 3-step+ charging for gel, AGM, flooded and lithium ion plus a user-defined profile
- Automatic current distribution based on each battery's condition
- Pre-float prevents overcharging when combining different battery sizes
- Compatible with all worldwide mains voltages and frequencies (80-275V, 50/60Hz)
- MasterBus, CZone and NMEA2000 communication, or plug-and-play standalone use
- Improved cooling with vario fan keeps noise low across the power range
- Rugged, compact design with galvanic isolation and IP23 protection
- 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, NMEA2000 |
General specifications
| Nominal output voltage | 12 V |
| Max. output current primary output | 35 A |
| Total charge current | 35 A at 14,25 V |
| Max. AC current (230 V / 120 V) | 2.5 A / 5.0 A |
| Number of battery outlets | 3 (max.) |
| Battery bank size | 140-350 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 | 291 x 210 x 105 mm |
| Weight | 2,5 kg |
| Compliance | CE, CEC, DOE, ABYC, UL1236, cULus, SAE J1171, ISO 8846, ACMA |
Technical specifications
| Charge characteristic | IUoUo, automatic / 3-step+ for Gel/AGM/flooded/Lithium Ion + user defined option |
| Temperature compensation | -30 mV/°C / -38 mV/°F; incl. temperature sensor |
| DC voltage compensation | Yes, via automatic compensation or MasterShunt |
| Power consumption (DC side) | < 2 mA (MasterBus off) |
| Current Control function | yes, through MasterBus or CZone |
| Power factor control | > 0,98 |
| Temperature range (ambient temp.) | -25 °C to 70 °C, derating > 40 °C, 80% power at 60 °C |
| 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) |




