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Mastervolt-28010300- AC Master 12/300, universal socket

Mastervolt-28010300- AC Master 12/300, universal socket

  • $ 189.85 USD

AC Master 12/300


Mastervolt sine wave inverters have proven themselves under the most extreme conditions for over 25 years. Our inverter family consists of AC Master, Mass Sine and Mass Sine Ultra models, ranging from 300 watt up to 40 kW. The AC Master is ideal for small and medium-sized applications, while Mass Sine and the advanced Mass Sine Ultra inverters are mainly intended for larger systems and for professional purposes. 

AC Master series: Reliable AC power for recreational and semi-professional use

These affordable sine wave inverters convert 12 or 24 V battery voltage into reliable 230 V 50/60 Hz grid power, making them ideal for recreational and semi-professional applications. The AC Master series is easy to install and delivers full output, even under the most demanding conditions. The pure sine wave technology provides an outstanding power quality, ensuring the correct functioning of sensitive equipment. The usage of high frequency switching technology eliminates any annoying humming and buzzing sounds.

Representing complete value for money, these ruggedly built inverters provide essential home comforts when you’re far from the nearest grid connection.


  • Complete range from 300 W to 3500 W.
  • Pure sine wave technology protects sensitive equipment.
  • Delivers full output at high peak power under the most demanding conditions.
  • Variable speed fan for quiet operation at low power.
  • Automatic power saving system for extended runtime.
  • Compact and lightweight design, saving valuable installation time.
  • Reliable and safe operation; protected against over-temperature, overload, short circuit,
  • high or low battery voltage.
  • Suitable for marine & mobile use.
  • Optional remote control INVR-1 for instant switch off (available from 700 watt models).
  • Convenient plug connection for all models, 2500/3500 Watt models also hard wired. 

In addition, the 2500/3500 Watt models offer

  • Combine 2 up to 15 units to obtain high power or 3-phase systems.
  • Integrated transfer system, switches automatically between AC power sources.  


Both recreational and semi-professional use, where grid power varies or is unavailable. Applications include lighting, appliances, electric cooking and power tools. For (mobile) applications in your home, office or service vehicle, or during your holidays. 


General specifications
Output voltage 230 V - 50 Hz (± 0.1%)
Output waveform true sine
Nominal battery voltage 12 V
Recommended battery capacity ≥ 60 Ah
Continuous power at 25 °C / 77 °F, cos phi 1 300 W
Continuous power at 40 °C / 104 °F, cos phi 1 250 W
Peak load 600 W
AC connection universal
Efficiency 90 %
Display/read-out LED display
Dimensions, hxwxd 210 x 130 x 60 mm
8.3 x 5.1 x 2.4 inch
Weight 1.16 kg
2.6 lb
Alarms 4 alarm modes
Approvals CE, E-mark, ABYC A-31
Technical specifications
Technology high frequency, input & output fully isolated
Low battery voltage, switches off at 10 V, ± 0.5 V
Low battery voltage, switches on at 11 V, ± 0.5 V
High battery voltage, switches off at 16 V, ± 0.5 V
High battery voltage, switches on at 14.5 V, ± 0.5 V
Max. ripple on DC (battery) 10 % RMS
Input current (nominal load) 22.5 A
No-load power consumption (ON mode) 0.58 A – 7 W
No-load power consumption (energy saving mode) 0.33 A - 4 W
Minimal DC fuse (slow blow) 2x 40 A
Minimal cable size 1,5 mtr DC kabel standaard in levering
Harmonic distortion typical < 6 %
Cos phi all power factors allowed
Temperature range (ambient temp.) 0 °C to 40 °C, derating power ≥ 40 °C
32 °F to 104 °F
Switch off at (auto recover after cooling down) 50 °C
122 °F
Protection degree IP23, vertical wall mounting
Protections over temperature, over load, short circuit, high/low battery voltage
Cooling natural/forced
MasterBus compatible no

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