Mastervolt the Dutch leader in off-grid electrical systems has unveiled an innovative new Mass Combi Ultra series. This compact inverter/charger combination with a smart transfer system highly efficient MPPT solar charge regulator (available from October 2014 onwards) and separate second charger is all enclosed within a robust quality unit that is easy to install. Following the ever-increasing demand for higher power and greater comfort systems are becoming more and more complex. In response the Mastervolt team went back to the drawing board to redesign what was already the best product in the market. Our goal was to fulfil the requirements of today and tomorrow which the Mass Combi Ultra achieves by integrating all the common needs of an electrical system. This simplifies installation lowers overall costs and significantly increases performance.

The latest technologies

The Mass Combi Ultra includes revolutionary technology developed by Mastervolt s own engineering team. Notable achievements include combining the latest V6 high frequency converter technology with ultra-fast and powerful DSP controls. This offers major user benefits such as a low no load current preventing your batteries from draining and extreme peak power capability which allows high current loads such as air conditioning to start-up easily without power dips or light flickering. Another benefit is the high efficiency which makes the Mass Combi Ultra the most complete product in its class.

Mass Combi Ultra in a Mastervolt system

The new Mass Combi Ultra fits perfectly into Mastervolt systems. All components are easily connected via MasterBus and installation can be controlled and monitored intuitively even with just one MasterView Easy touchscreen. This will provide and manage all information about the Combi the batteries and other sources such as the generator grid or solar panels. The system is also suitable for Digital Switching Mastervolt s decentralised digital switching system.

• Product Specifications | Download

General specifications		General specifications
Display/read-out	LED display
Dimensions hxwxd	472 x 318 x 175 mm 18.6 x 12.5 x 6.9 inch
Weight	15 kg 33.1 lb
Approvals	CE ABYC
Technical specifications		Technical specifications
Charge characteristic	IUoU automatic 3-step+ for AGM/gel/Lithium Ion/flooded/flooded traction/spiral/NiCad
Ground relay	adjustable
Temperature range (ambient temp.)	-25 C to 60 C derating > 40 C -13 to 140 F
Protection degree	IP23 (vertical mounting)
Protections	over temperature AC over load AC short circuit DC short circuit high battery low battery
MasterBus compatible	yes
Specifications sine wave inverter		Specifications sine wave inverter
Nom. DC voltage	24 V (19 32 V)
Output voltage ( 2%)	230 V - 50/60 Hz ( 0.005%) adjustable
Output waveform	true sine wave Thd < 1% under standard conditions
Cont. power at 40 C cos phi 1	3500 W
Surge capability	7000 W A
Parallel configuration	yes up to 10 standard
3-Phase configuration	yes
Max. efficiency	91 %
Max. ripple on DC (battery)	< 10%
No-load power consumption (ON/inverter OFF/OFF)	16 W / 2 W / 0 W
Specifications battery charger		Specifications battery charger
Nom. input voltage	180 275 V
Nom. battery voltage	24 V
Max. charge current at 40 C	100 A at 28.5 V
Charge method secondary charger	IUoU automatic 3-step+ or constant voltage
Secondary charger output voltage	12-24 V adjustable
Secondary charger output current	10 A
Temperature sensor battery	yes included
Specifications transfer system		Specifications transfer system
Generator input (switched)	50 A
Mains input (switched)	30 A
AC output 1	67 A
AC output 2 (switched)	50 A
Transfer time	seamless (UPS < 1 ms)
Transfer voltage range (adjustable)	180 275 V
Transfer frequency range (adjustable)	35 65 Hz
Power Sharing / Generator / Mains Support	yes
Solar input (DC) specifications		Solar input (DC) specifications
Input voltage range	15-100 V
Max. PV power	500 Wp
Max. input current	18 A
Max. charge current	15 A at 28.5 V
MPP voltage range at nom. power	35-80 V