Even under the most extreme conditions the products from the Mass series operate faultlessly, giving you round-the-clock output when necessary. With an MTBF of 180,000 hours at full capacity and 24/7 use, the Mass products are ideal for the toughest tasks and any situation that requires a reliable power supply.Optimal flexibility in system designChoosing an independent sine wave inverter allows you complete freedom of choice of battery charging equipment. You can freely adapt the rating of these chargers, depending on the desired charge time.High EfficiencyThe high efficiency and automatic economy mode are designed to allow digital clocks to work properly and ensure you many more hours of operation from your batteries. The application of high-frequency technology prevents any annoying humming and zooming sounds, while the high peak capacity ensures that the high inrush current required for electrical tools, for example, is seamlessly produced.With an AC capacity of 4000 W in one unit, the Mass Sine Ultra can satisfy even the greatest energy demands. As ten units can be switched in parallel or 3x3 in a three-stage configuration, the Mass Sine Ultra can supply a capacity of up to 40 kW. The inverter provides full power at 40 °C and works smoothly even in extreme conditions such as engine rooms and technical spaces. Like all Mass products, the inverter is supplied in a compact and robust casing. This inverter is the best choice if you are looking for autonomous AC capacity of over 3 kW.Make the most of your batteriesThe Mass Sine Ultra is equipped with a dynamic battery voltage window. Taking into account the type of battery and current, this function ensures the inverter can supply AC longer without overtaxing the batteries.Features:For heavy duty work in professional and semiprofessional applications.Full capacity at temperatures up to 40 °C.Pure sine wave output prevents failures and damage to connected sensitive equipment.High peak capacity for the seamless switching on of complex and heavy loads.Dynamic, battery-specific input current for an optimal use of every type of battery.Parallel configuration of up to ten devices for a capacity up to 40 kW.3-Phase configuration for a capacity up to 36 kW.Integrated MasterBus.Suitable for mobile applications.Professional connections.Automatic, reliable and safe operation.Optional: Masterswitch/Systemswitch for automatic selection of the desired energy source.