Meet the Mastervolt AC Master 12/700 Inverter, a compact 12 V input to 120 V output powerhouse designed for recreational and semi-professional applications. This true sine-wave inverter delivers clean grid-like power, protecting sensitive equipment while maximizing performance under demanding conditions. With smart efficiency and thoughtful design, it’s easy to install, reliable, and built to extend your off-grid or mobile power capabilities.

Key Features

• Pure sine wave output provides smooth, stable power for sensitive electronics and appliances.
• 700 W continuous power at 25 °C (77 °F) and 700 W at 40 °C (104 °F) with < 3% harmonic distortion.
• High peak power capability: < 810 W for 1 minute and < 1230 W for 1 second to handle surge loads.
• Automatic power saving system extends runtime when full output isn’t needed.
• Compact, lightweight design for easy installation and handling (7.9 x 13.0 x 3.3 inches, 5.7 lb).
• Quiet operation with a variable-speed cooling fan that reduces noise at low power.
• Remote control option allows instant switch-off of the inverter and all connected equipment (not available for the 300/500 W models).
• Plug connection for all models (2500/3500 W models are hard wired) for versatile installations.
• Reliable protection against over-temperature, overload, short circuit, high/low battery voltage; galvanic isolation.
• MasterBus compatible via MasterBus AC Master Interface for system integration.

Technical Specifications

• Output voltage: 100/110/115/120 V — 50/60 Hz (selectable)
• Output waveform: True sine
• Nominal battery voltage: 12 V
• Recommended battery capacity: ≥ 100 Ah
• Continuous power: 700 W at 25 °C / 77 °F (cos φ = 1)
• Continuous power: 700 W at 40 °C / 104 °F (cos φ = 1)
• Peak load (1 min): < 810 W
• Peak load (1 s): < 1230 W
• AC connection: North American socket with GFCI
• Galvanic isolation: Yes
• Efficiency: 91%
• Display/read-out: LED indicates battery voltage, load level, status
• Alarms: Potential-free alarm contact
• Dimensions (HxWxD): 7.9 x 13.0 x 3.3 in
• Weight: 5.7 lb
• Technology: High-frequency, input & output fully isolated
• Low battery off threshold: 10.5 V; on: 12.5 V
• High battery off threshold: 16.5 V; on: 14.5 V
• Input current (nominal load): 70 A
• No-load power consumption (ON mode): < 1.5 A
• No-load power consumption (energy saving mode): < 0.1 A
• Minimal DC fuse: 100 A
• Minimal cable size: 25 mm
• Harmonic distortion: < 3%
• Cos φ: All power factors allowed
• Temperature range (ambient): -4 °F to 140 °F
• Cooling: Variable-speed fan for temperature-controlled operation
• Protection: IP21, horizontal wall mounting
• Protections: Over-temperature, overload, short circuit, high/low voltage, reverse polarity (fuse)
• MasterBus compatible: Yes (using a MasterBus AC Master Interface)