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
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Pure sine wave output provides smooth, stable power for sensitive electronics and appliances.
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700 W continuous power at 25 °C (77 °F) and 700 W at 40 °C (104 °F) with < 3% harmonic distortion.
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High peak power capability: < 810 W for 1 minute and < 1230 W for 1 second to handle surge loads.
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Automatic power saving system extends runtime when full output isn’t needed.
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Compact, lightweight design for easy installation and handling (7.9 x 13.0 x 3.3 inches, 5.7 lb).
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Quiet operation with a variable-speed cooling fan that reduces noise at low power.
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Remote control option allows instant switch-off of the inverter and all connected equipment (not available for the 300/500 W models).
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Plug connection for all models (2500/3500 W models are hard wired) for versatile installations.
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Reliable protection against over-temperature, overload, short circuit, high/low battery voltage; galvanic isolation.
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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)
| General specifications |
| Output voltage |
100/110/115/120 V — 50/60 Hz (selectable) |
| Output waveform |
true sine |
| Nominal battery voltage |
12v |
| Recommended battery capacity |
≥ 100 Ah |
| Continuous power at 25 °C / 77 °F, cos phi 1 |
700 W |
| Continuous power at 40 °C / 104 °F, cos phi 1 |
700 W |
| 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 indication: battery voltage, load level, status |
| Alarms |
potential free alarm contact |
| Dimensions, hxwxd |
7.9 x 13.0 x 3.3 inch |
| Weight |
5.7 lb |
| Technical specifications |
| Technology |
high frequency, input & output fully isolated |
| Low battery voltage, switches off at |
10,5 V |
| Low battery voltage, switches on at |
12,5 V |
| High battery voltage, switches off at |
16,5 V |
| High battery voltage, switches on at |
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 (slow blow) |
100 A |
| Minimal cable size |
25 mm
|
| Harmonic distortion typical |
< 3 % |
| Cos phi |
all power factors allowed |
| Temperature range (ambient temp.) |
-4 °F to 140 °F |
| Cooling |
temperature and load controlled fan |
| Protection degree |
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 |