Mastervolt AC Master 12/300 Pure Sine Wave Inverter
The Mastervolt AC Master 12/300 is a compact and reliable pure sine wave inverter designed to convert 12V battery power into stable 230V AC output. It is an excellent choice for campervans, motorhomes, boats and other mobile applications where quiet, dependable mains-style power is needed.
Built for recreational and semi-professional use, it offers the trusted quality of Mastervolt in a lightweight and easy-to-install design.
Reliable 230V Power from a 12V Battery
This inverter provides clean 230V / 50 Hz AC power, making it suitable for a wide range of small appliances and sensitive electronic devices. Its pure sine wave output helps connected equipment operate smoothly, without the humming, screen interference or reduced lifespan often associated with lower-grade power supplies.
It is ideal for powering everyday devices while travelling or working away from fixed mains power.
Suitable for powering
Sensitive electronics
Safe for laptops, chargers, audio-visual equipment and other delicate devices.
Small household appliances
Suitable for lower-power 230V appliances used in leisure and mobile settings.
Mobile power applications
A practical option for campervans, boats and light-duty professional use.
Pure Sine Wave Output
The AC Master 12/300 produces a pure sine wave, similar to the electricity supply at home. This makes it a better choice for modern electronics and appliances that need stable, clean power.
By using a high-quality sine wave output, the inverter helps protect connected equipment and supports reliable day-to-day performance.
Compact, Quiet and Efficient
One of the main strengths of the AC Master range is its compact and lightweight construction. The 12/300 is easy to fit where space is limited and operates with low noise, making it well suited to enclosed spaces such as boats and leisure vehicles.
With an efficiency of 90%, it also makes effective use of available battery power.
Easy to Install and Use
This inverter is designed for straightforward installation and practical everyday use. The universal AC socket adds convenience, while the LED display gives a clear status indication during operation.
The AC Master range is developed to create a reliable onboard electrical system without unnecessary complexity.
Technical Specification
Electrical specification
- Input voltage: 12V
- Output voltage: 230V AC
- Output frequency: 50 Hz
- Waveform: pure sine wave
- Continuous power at 25°C: 300W
- Continuous power at 40°C: 250W
- Peak power: 600W
- Efficiency: 90%
- Input current at nominal load: 22.5A
- Minimum battery capacity: 60 Ah
Switching thresholds
- Low battery shutdown: 10V ± 0.5V
- Low battery restart: 11V ± 0.5V
- High battery shutdown: 16V ± 0.5V
- High battery restart: 14.5V ± 0.5V
Consumption
- No-load consumption, on mode: 0.58A / 7W
- No-load consumption, standby mode: 0.33A / 4W
Physical specification
- Dimensions: 210 x 130 x 60 mm
- Weight: 1.16 kg
Other specifications
- AC connection: universal
- Display: LED display
- Cooling: natural / forced
- Noise level: 53 dBA at 1 metre
- Protection rating: IP23
- Harmonic distortion: < 6%
- Temperature range: -25°C to 60°C
- Minimum DC fuse: 40A slow-blow
- MasterBus compatible: no
Protection features
- Over-temperature protection
- Overload protection
- Short-circuit protection
- Battery overvoltage protection
- Battery undervoltage protection
Compliance
Ideal for Leisure and Light Professional Use
The Mastervolt AC Master 12/300 is particularly suitable for:
- Campervans
- Motorhomes
- Boats
- Small mobile work setups
- Recreational off-grid use
- Semi-professional applications
It gives you dependable 230V power in a compact format, without taking up unnecessary space.
A Compact Pure Sine Wave Inverter You Can Rely On
If you need a small, quiet and efficient 12V inverter, the Mastervolt AC Master 12/300 is a strong choice. It delivers clean 230V output, protects sensitive equipment and offers trusted Mastervolt quality in a compact and practical unit.
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