Mass battery chargers sine wave inverters and DC-DC converters are designed for the toughest conditions for professional semi-professional and recreational purposes. Even under the most extreme conditions the products from the Mass series operate faultlessly giving you round-the-clock output when necessary. The sustainability and technologies that underpin the Mass concept have long been proven in practice. With an MTBF of 280000 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. You can always rely on their proven and technically advanced components.

Making the best even better

The reliability and long lifespan of Mastervolt s battery chargers sine wave inverters and DC-DC converters have been established beyond doubt over the past decade. While the Mass products have evolved with the latest technological developments the dimensions and connections have remained the same. As a result it is exceptionally easy to replace one unit with another with only negligible downtime.

Mastervolt Green by Heart

As part of our constant search for eco-friendly and long-lasting solutions Mastervolt has developed the Green by Heart programme. Its impact on the Mass battery chargers Mass Sine inverters and Mac & Magic DC-DC converters include:

• An exceptionally effective use of the consumed input current (cos phi) > 0.98!
• Faster charging of batteries even with when the input current is limited.
• Use of top quality components with a long lifespan.
• Savings in weight and space.
• Fewer installation materials.
• Product Specifications | Download

MasterBus compatible

For the DC-DC converters you can use the MasterBus Serial Interface. All you need is a single cable with one connection. Your benefits: Fast and easy installation plus centralised monitoring configuration and operation of your system with a MasterView panel.

General specifications		General specifications
Nom. output voltage	27.2 V
Output voltage (adjustable with MasterAdjust)	20-28.5 V
Output voltage dimmer (adjustable with MasterAdjust)	8-26 V
Output voltage stabilisation	2% at extremes of temperatures load and input
Output voltage ripple (peak peak)	max. 1%
Max. output power	300 W
Nom. output power	300 W
Max. output current	10 A
Output charge current (3-step mode)	8 A
Nominal input voltage	12 V
Input voltage range	11-16 V
Input voltage range (3-step charge mode)	12-16 V
Lower input set point (adjustable with MasterAdjust)	10 V
Delay lower input set point (adjustable with MasterAdjust)	30 sec.
Galvanic isolation	yes
Voltage limited	yes
Efficiency	> 90% at nom. input voltage full load; peak 92 %
Dimmer function	yes by external momentary switch via fast-on connection to be activated by DIP switch setting
Alarm contact	yes (fast-on connector)
Dimensions hxwxd	227 x 154 x 81 mm 8.9 x 6.1 x 3.2 inch
Weight	1.8 kg 4.0 lb
Approvals	CE
Technical specifications		Technical specifications
3-Step charge option	yes (DIP switch settings)
DC consumption	< 115 mA
Connections	screw terminals (max. wire size 16 mm / AWG5)
Temperature range (ambient temp.)	-25 C to 80 C derating > 40 C -13 to 176 F
Cooling	maintenance free vario fans
Sound level	< 48 dBA at 1 mtr
Protection degree	IP21
Protections	against over load & over temperature
MasterBus compatible	yes in combination with a MasterBus Serial Interface