Mass Combi Ultra 48/3500-50 Charger/Inverter (230 V)

The Mastervolt Mass Combi Ultra 48/3500-50 is an all-in-one power solution. It combines a 3500 W pure sine wave inverter and a 50 A smart battery charger, designed to operate on a 48 V battery bank.

In converter mode, it delivers a continuous power output of 3500 W (up to 40 °C). It also features an excellent peak capacity reaching 7000 W, ideal for starting power-hungry equipment.

The charging module uses a 3-stage+ smart algorithm compatible with multiple chemistries:

Flooded lead-acid and tractionGel and AGMSpiral-wound batteriesLithium-IonNickel-Cadmium

Yes, it has a secondary 10 A charging output designed for maintaining a small battery (such as a starter battery). This output is configurable for 12 V or 24 V batteries.

The Power Assist function smooths out power consumption peaks. If the energy demand of your devices exceeds the capacity of the shore power or generator, the device temporarily uses energy from the batteries to compensate, preventing circuit breakers from tripping.

Absolutely. Using the MasterBus network, you can connect up to 10 units in parallel to multiply the available power, or configure them to create a complex three-phase electrical network.

The device is designed to be as quiet as possible. It integrates the Active Optima Cooling system, which ensures optimal cooling of components while significantly reducing ventilation noise.

The housing is very compact for its power output. It measures 472 x 318 x 178 mm (height x width x depth) and weighs 15.3 kg in total.

This model is highly flexible: it has two AC inputs (one for shore power and one for a generator) and two AC outputs. The second output is switchable, allowing automatic load shedding of non-critical loads when no external source is available.

It has an IP23 protection rating. This means it is protected against accidental contact with fingers and water sprayed at an angle less than 60 degrees. It must be installed indoors, away from direct moisture.

Yes, the pure sine wave output at 230 V has a configurable frequency of 50 Hz or 60 Hz (± 0.005 %), making it fully compatible with international electrical standards.

The Mass Combi Ultra offers a maximum efficiency above 93 %. This high efficiency minimizes heat losses and maximizes the energy output from your battery bank.

To ensure safety and efficiency in a 48 V system, use DC cables with a minimum cross-section of 35 mm², protected by an inline 80 A fuse.

Configuration and monitoring can be done in two ways:

Manually via the DIP switches located directly on the device. Digitally via the MasterBus network, using a compatible display or the MasterAdjust software on a PC.

The device is designed to operate in demanding environments, with an operating temperature range from -25 °C to 60 °C. Note that automatic power derating applies above 40 °C to protect the electronics.

Yes, the inverter delivers a pure sine wave output. This ensures a safe, stable, and interference-free power supply, essential for the proper operation of sensitive electronic equipment such as computers, televisions, or tool chargers.

Yes, a battery temperature sensor is included with the device. It allows the charger to automatically adjust the charging voltage based on the battery temperature, optimizing charging and significantly extending battery life.

Yes, during installation, it is mandatory to leave at least 150 mm of free space below the Mass Combi Ultra. This ensures adequate airflow for cooling and allows easy access to configuration switches.

In the event of an external power source failure (shore power or generator), the ultra-fast AC transfer system instantly switches to the inverter. Devices connected to the main output (Out-1) continue to operate without any noticeable interruption.

Yes, the device is highly secure. It includes automatic protection against:

Output overloads and short circuits.Internal overheating.Abnormally high or low battery voltages.