Mastervolt ChargeMaster Plus 12/35-3 Battery Charger 12V 35A 3-Output – Smart System-Ready
The ChargeMaster Plus 12/35-3 from Mastervolt is a powerful and intelligent multi-output battery charger designed for marine, automotive, and off-grid energy systems. With a total charging current of 35 A at 14.25 V, it delivers fast, adaptive, and safe charging for up to three battery banks. Compatible with all battery chemistries including Lithium Ion, it features MasterBus, CZone, and NMEA2000 integration, as well as standalone plug-and-play functionality.
Its ‘Battery’s Best Friend’ architecture includes advanced pre-float overcharge protection and automatic current distribution, ensuring each connected battery receives the charge it needs. Operating globally on any mains voltage and frequency, the charger is compact, rugged, and ideal for demanding mobile and marine environments.
Key Features
- Three independent outputs – all capable of delivering max current (35 A total)
- Charges all battery types: AGM, Gel, flooded, Lithium Ion
- Pre-float function prevents overcharging of small batteries
- Universal AC input: 120/230 V (80–275 V), 50/60 Hz
- Full integration with MasterBus, CZone, and NMEA2000
- Real-time temperature and voltage compensation
- Plug-and-play or full system operation
- Quiet operation with vario fan cooling
- Certified for marine and mobile applications: CE, UL1236, cULus, ABYC, ISO 8846, SAE J1171, ACMA
Technical Specifications
| General Specifications | |
|---|---|
| Nominal Output Voltage | 12 V |
| Total Charge Current | 35 A at 14.25 V |
| Max. Output per Bank | 35 A (shared across 3 outputs) |
| Battery Outputs | 3 |
| Recommended Battery Bank Size | 140–350 Ah |
| Input Voltage Range | 120/230 V (80–275 V), 50/60 Hz |
| Power Supply Mode | Yes |
| Galvanic Isolation | Yes |
| Display | LED indicators |
| Cooling | Vario fan |
| Protection Degree | IP23 (vertical mount) |
| Dimensions (H x W x D) | 291 x 210 x 105 mm |
| Weight | 2.5 kg |
| Charging & Control | |
|---|---|
| Charging Algorithm | IUoUo, 3-step+ automatic |
| Supported Batteries | Gel, AGM, flooded, Lithium Ion, user-defined |
| Temperature Compensation | -30 mV/°C (sensor included) |
| DC Voltage Compensation | Yes (auto or via MasterShunt) |
| Communication Interfaces | MasterBus, CZone, NMEA2000 |
| Current Control Function | Yes (via MasterBus or CZone) |
| Electrical Performance | |
|---|---|
| Max AC Input Current | 2.5 A @ 230 V / 5.0 A @ 120 V |
| Power Factor | > 0.98 |
| Power Consumption (DC Side) | <2 mA (MasterBus off) |
| Operating Temperature | -25°C to 70°C (derating> 40°C) |
Protections
- Over-temperature
- Overload
- Short circuit
- High/low battery voltage
- Ignition protected
Certifications
- CE
- ABYC A-31
- UL1236
- cULus
- SAE J1171
- ISO 8846
- CEC/DOE
- ACMA
Optional Accessories
- Charger Status Interface – Multipurpose Contact Output (code: 77030500)
