1. Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your Mastervolt Mass Combi Pro 24/3500-100 Power Inverter / Charger. Please read this manual thoroughly before using the device to ensure proper function and to prevent damage or injury. Keep this manual in a safe place for future reference.
2. Safety Instructions
Always observe the following safety precautions to prevent personal injury or damage to the equipment:
- Qualified Personnel: Installation and maintenance should only be performed by qualified personnel familiar with electrical systems and safety procedures.
- Electrical Shock Hazard: This device operates with high voltages. Do not open the casing or attempt repairs unless specifically instructed by Mastervolt. Disconnect all power sources (AC and DC) before servicing.
- Ventilation: Ensure adequate ventilation around the unit to prevent overheating. Do not block ventilation openings.
- Environment: Do not expose the unit to water, excessive moisture, or flammable liquids. Install in a dry, protected environment.
- Battery Safety: When working with batteries, wear appropriate personal protective equipment. Batteries can produce explosive gases.
- Proper Wiring: Use correct wire gauges and ensure all connections are tight and secure to prevent fire hazards or poor performance.
3. Product Overview
The Mastervolt Mass Combi Pro 24/3500-100 is a powerful and versatile inverter/charger combination designed for demanding applications. It integrates an advanced inverter, a robust battery charger, and a sophisticated transfer system into a single unit.
Key features include:
- High Power Output: Provides 3500 W of continuous inverter power.
- Advanced Charging: Features a built-in solar charge controller for optimal yield and efficient battery charging.
- Parallel and 3-Phase Operation: Capable of integration into parallel or 3-phase configurations for larger load requirements up to 35 kW (requires external switching system for larger systems).
- Efficient Technology: Utilizes new inverter technology for low standby consumption and a fast digital signal processor for seamless switching between power sources.
- Power Assist: Prevents power breaks and outages, even with weak power connections or small generators.
- Quiet Operation: Active Optima Cooling allows up to 50% of charging current or inverter capacity without fan cooling, ensuring quiet operation at lower loads.
- MasterBus Integration: Equipped with MasterBus for advanced system monitoring and control.
- Dual AC Inputs: Features two separate AC inputs for generator and shore power, adapted to specific power source characteristics.
Front view of the Mastervolt Mass Combi Pro 24/3500-100, showing the grey casing with vertical fins for cooling, the 'PRO' logo, 'MASS COMBI PRO 24/3500 - 100 INVERTER / CHARGER COMBINATION' text, and a teal control panel on the right. The control panel features indicator lights for 'Gen', 'Mains', 'Out 1', 'Out 2', and battery charging states ('Float', 'Abs', 'Bulk'), along with an 'On/Off/Inverter Off' switch.
4. Setup and Installation
Proper installation is crucial for the safe and reliable operation of the Mass Combi Pro. It is strongly recommended that installation be performed by a certified marine or electrical technician.
- Mounting: Mount the unit in a dry, well-ventilated area, away from heat sources and flammable materials. Ensure sufficient clearance for airflow around the unit.
- DC Wiring: Connect the DC input to your battery bank using appropriately sized cables and fuses. Observe correct polarity.
- AC Input Wiring: Connect the AC inputs (shore power and/or generator) to the designated terminals. Ensure proper grounding and circuit protection.
- AC Output Wiring: Connect your AC loads to the AC output terminals.
- Remote Control/Monitoring: If applicable, connect any remote control panels or MasterBus communication cables.
- Initial Power-Up: After all connections are secure, carefully apply DC power, then AC input power. Observe the indicator lights for normal operation.
5. Operating Instructions
The Mass Combi Pro features a user-friendly control panel for basic operation and status monitoring.
5.1 Control Panel Overview
Refer to the product image in Section 3 for visual reference of the control panel.
- On/Off/Inverter Off Switch: This switch controls the main power and inverter function.
- On: Activates both the inverter and charger functions.
- Off: Turns off the entire unit.
- Inverter Off: Disables the inverter function while allowing the charger to remain active (if AC input is present).
- Indicator Lights: These LEDs provide status information:
- Gen: Indicates generator AC input is active.
- Mains: Indicates shore power AC input is active.
- Out 1 / Out 2: Indicate AC output status.
- Float / Abs / Bulk: Indicate the current stage of the battery charging process.
5.2 Basic Operation
- Starting the Unit: Set the On/Off/Inverter Off switch to 'On'. The unit will perform a self-test, and the inverter will begin supplying AC power from the batteries if no external AC input is present.
- Charging Batteries: When an external AC source (shore power or generator) is connected and active, the unit will automatically begin charging the batteries according to the detected charge stage (Bulk, Absorption, Float).
- Switching AC Sources: The unit automatically switches between available AC input sources (generator, mains) and inverter power to ensure continuous AC supply to your loads.
- Shutting Down: To turn off the unit, set the On/Off/Inverter Off switch to 'Off'.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your Mass Combi Pro.
- Cleaning: Periodically clean the exterior of the unit with a dry, soft cloth. Ensure ventilation openings are free from dust and debris. Do not use liquid cleaners.
- Connections: Annually inspect all electrical connections (DC and AC) for tightness and corrosion. Loose connections can cause overheating and poor performance.
- Battery Inspection: Regularly check your battery bank according to the battery manufacturer's recommendations.
- Firmware Updates: Check the Mastervolt website for any available firmware updates for your unit. Updates may improve performance or add new features.
7. Troubleshooting
If you encounter issues with your Mass Combi Pro, refer to the following basic troubleshooting steps. For complex problems, contact Mastervolt support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not power on | No DC input power; Blown DC fuse; Unit switch in 'Off' position. | Check battery connections and voltage; Inspect DC fuse; Set switch to 'On'. |
| No AC output from inverter | Inverter switch in 'Inverter Off' position; Low battery voltage; Overload. | Set switch to 'On'; Charge batteries; Reduce AC load. |
| Batteries not charging | No AC input power; AC input breaker tripped; Faulty battery connection. | Check shore power/generator; Reset AC breaker; Inspect battery wiring. |
| Unit is overheating | Blocked ventilation; Excessive ambient temperature; Overload. | Clear obstructions; Ensure proper ventilation; Reduce load. |
8. Specifications
The following table details the technical specifications for the Mastervolt Mass Combi Pro 24/3500-100.
| Specification | Value |
|---|---|
| Brand | Mastervolt |
| Model Name | 24/3500-100 |
| Model Number | 38523500 |
| Power Source | Solar Powered |
| Input Voltage | 24 Volts (DC) |
| Output Power | 3500 Watts |
| Output Voltage | 24 Volts (AC) |
| Peak Output Power | 35000 Watts |
| Electrical Output Waveform | Pure Sine Wave |
| Standby Power Shutoff | 95% |
| Energy Specifications Met | UL |
| UPC | 816882020407 |
| ASIN | B08BP18LMP |
9. Warranty and Support
For warranty information, technical support, or service, please contact Mastervolt directly or refer to their official website. Keep your purchase receipt and product serial number handy when contacting support.
Mastervolt Official Website: www.mastervolt.com
