Victron MultiPlus 48/3000/35

Victron MultiPlus 48/3000/35


The MultiPlus is a powerful true sine wave inverter, a sophisticated battery charger that features adaptive charge technology and a high-speed AC transfer switch in a single compact enclosure. In addition, the MultiPlus features a generator or shore power support function called PowerAssist.

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Convenience and Ease of Installation

Inverters produce an AC mains output from a battery bank DC supply. In many cases this is used as a back-up in case a grid supply fails. Once the grid comes back on line, the inverter is no longer needed, but we need to replenish the energy consumed from the battery bank. So, we could simply attach a battery charger to the battery bank and now, supplied by the restored mains power, it will charge the batteries ready for the next outage. Alternatively, if the relationship between the amount of inverter power needed and the charge rate to replenish the batteries afterwards is a commonly used one, then we can use an all-in-one inverter charger unit. With fewer connections and a smaller unit size overall - it is a neat solution.

Game Changing Functionality

Early units simply combined the two functions of inverter and charger, switching between these functions automatically. Today, the more advanced inverter-chargers have an added function; they can add inverter power to the mains power being supplied. When required, the inverter function will connect seamlessly to the supply power and give a boost to a low power supply when demand temporarily peaks above what is available (such as from a weak grid or small generator). When the demand drops back down below the level of supply from the mains input, the charger function uses the some mains power to recharge the batteries - putting back the energy used, until next time. This ability to 'parallel' inverter power with a mains supply has profound implications for the design of modern power management systems in terms of maximising efficiency.

The Hybrid Power System

The ability of a Victron MultiPlus to work with a source of mains and use a battery bank as a 'reservoir' of energy, leads us to consider the battery bank as a focal point of energy storage and it becomes more important than just for short term 'back-up'. The battery bank can now be fed with as much energy from renewables as is practical such as from solar, wind turbines or water turbines. See the Applications page for more information.


Inverter Power VA (30 min) - 3000

Inverter Peak Power VA (5 sec) - 6000

Charger Output (A) - 35

Voltage - 48

Transfer Relay Rating (A) - 16