Mastervolt AC Master Inverter
£ 154.95 - £ 749.95
Mastervolt AC Master sine wave inverters have proven themselves under the most extreme conditions for over 25 years. 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.
Features (IEC models)
Pure sine wave technology protects sensitive equipment.
Delivers full output at high peak power under the most demanding conditions.
Automatic power saving system for extended runtime.
Easy to install: convenient IEC socket with IEC plug included.
Reliable and safe operation; protected against over-temperature, overload, short circuit, high or low battery voltage.
Features (UK Plug Models)
Pure sine wave technology protects sensitive equipment.
Delivers full output at high peak power under the most demanding conditions.
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.
Variable speed fan for quiet operation at low power.
Optional remote control for instant switch off of the inverter and all connected equipment (not available for the 300 and 500 W models).
Convenient UK plug connection
| General specifications | 12v 300W IEC | 12v 500W IEC |
| Output voltage | 230 V – 50 Hz (± 0.1%) | 230 V – 50 Hz (± 0.1%) |
| Output waveform | true sine | true sine |
| Nominal battery voltage | 12 V | 12 V |
| Recommended battery capacity | ≥ 60 Ah | ≥ 100 Ah |
| Continuous power at 25 °C / 77 °F, cos phi 1 | 300 W | 500 W |
| Continuous power at 40 °C / 104 °F, cos phi 1 | 250 W | 400 W |
| Peak load (5 s) | 600 W | 800 W |
| AC connection | universal | universal |
| Efficiency | 90% | 90% |
| Display/read-out | LED display | LED display |
| Dimensions, hxwxd | 210 x 130 x 60 mm | 210 x 130 x 60 mm |
| Weight | 1.16 kg | 1.22 kg |
| Approvals | CE, E-mark, ABYC A-31 | CE, E-mark, ABYC A-31 |
| Technical specifications | 12v 300W IEC | 12v 500W IEC |
| Technology | high frequency, input & output fully isolated | high frequency, input & output fully isolated |
| Low battery voltage, switches off at | 10 V, ± 0.5 V | 10 V, ± 0.5 V |
| Low battery voltage, switches on at | 11 V, ± 0.5 V | 11 V, ± 0.5 V |
| High battery voltage, switches off at | 16 V, ± 0.5 V | 16 V, ± 0.5 V |
| High battery voltage, switches on at | 14.5 V, ± 0.5 V | 14.5 V, ± 0.5 V |
| Max. ripple on DC (battery) | 10 % RMS | 10 % RMS |
| Input current (nominal load) | 22.5 A | 37.5 A |
| No-load power consumption (ON mode) | 0.58 A – 7 W | 0.58 A – 7 W |
| No-load power consumption (energy saving mode) | 0.33 A – 4 W | 0.33 A – 4 W |
| Minimal DC fuse (slow blow) | 2x 40 A | 2x 40 A |
| Minimal cable size | 1.5 mtr DC cable delivered as standard | 1.5 mtr DC cable delivered as standard |
| Harmonic distortion typical | < 6 % | < 6 % |
| Cos phi | all power factors allowed | all power factors allowed |
| Temperature range (ambient temp.) | -20 °C to 60 °C, derating power > 40 °C | -20 °C to 60 °C, derating power > 40 °C |
| Cooling | natural/forced | natural/forced |
| Switch off at (auto recover after cooling down) | 50 °C | 50 °C |
| Protection degree | IP23, vertical wall mounting | IP23, vertical wall mounting |
| Protections | over temperature, over load, short circuit, high/low battery voltage | over temperature, over load, short circuit, high/low battery voltage |
| MasterBus compatible | no | no |
| General specifications | 12v 1000W | 12v 1500W | 24v 700W | 24v 1000W |
| Output voltage | 200/220/230/240 V – 50/60 Hz (selectable) | 200/220/230/240 V – 50/60 Hz (selectable) | 200/220/230/240 V – 50/60 Hz (selectable) | 200/220/230/240 V – 50/60 Hz (selectable) |
| Output waveform | true sine | true sine | true sine | true sine |
| Nominal battery voltage | 12 V | 12 V | 24 V | 24 V |
| Recommended battery capacity | ≥ 130 Ah | ≥ 160 Ah | ≥ 50 Ah | ≥ 65 Ah |
| Continuous power at 25 °C / 77 °F, cos phi 1 | 1000 W | 1500 W | 700 W | 1000 W |
| Continuous power at 40 °C / 104 °F, cos phi 1 | 1000 W | 1500 W | 700 W | 1000 W |
| Peak load (1 min.) | < 1150 W | < 1730 W | < 810 W | < 1150 W |
| Peak load (1 s) | < 1750 W | < 2650 W | < 1230 W | < 1750 W |
| AC connection | UK plug | UK plug | UK plug | UK plug |
| Efficiency | 92% | 93% | 93% | 94% |
| Display/read-out | LED indication: battery voltage, load level, status | LED indication: battery voltage, load level, status | LED indication: battery voltage, load level, status | LED indication: battery voltage, load level, status |
| Alarms | potential free alarm contact | potential free alarm contact | potential free alarm contact | potential free alarm contact |
| Dimensions, hxwxd | 200 x 372 x 83 mm | 248 x 421 x 83 mm | 200 x 330 x 83 mm | 200 x 372 x 83 mm |
| Weight | 3.3 kg | 4.2 kg | 2.7 kg | 3.3 kg |
| Approvals | CE, E-mark, RCM | CE, E-mark, RCM | CE, E-mark, RCM | CE, E-mark, RCM |
| Technical specifications | 12v 1000W | 12v 1500W | 24v 700W | 24v 1000W |
| Technology | high frequency, input & output fully isolated | high frequency, input & output fully isolated | high frequency, input & output fully isolated | high frequency, input & output fully isolated |
| Low battery voltage, switches off at | 10.5 V | 10.5 V | 21 V | 21 V |
| Low battery voltage, switches on at | 12.5 V | 12.5 V | 25 V | 25 V |
| High battery voltage, switches off at | 16.5 V | 16.5 V | 33 V | 33 V |
| High battery voltage, switches on at | 14.5 V | 14.5 V | 29 V | 29 V |
| Input current (nominal load) | 100 A | 150 A | 35 A | 50 A |
| No-load power consumption (ON mode) | < 1.5 A | < 1.8 A | < 0.8 A | < 0.8 A |
| No-load power consumption (energy saving mode) | < 0.1 A | < 0.1 A | < 0.06 A | < 0.05 A |
| Minimal DC fuse (slow blow) | 125 A | 175 A | 50 A | 63 A |
| Minimal cable size | 35 mm² | 50 mm² | 16 mm² | 16 mm² |
| Harmonic distortion typical | < 5 % | < 3 % | < 5 % | < 5 % |
| Cos phi | all power factors allowed | all power factors allowed | all power factors allowed | all power factors allowed |
| Temperature range (ambient temp.) | -20 °C to 60 °C, derating power > 40 °C | -20 °C to 60 °C, derating power > 40 °C | -20 °C to 60 °C, derating power > 40 °C | -20 °C to 60 °C, derating power > 40 °C |
| Cooling | temperature and load controlled fan | temperature and load controlled fan | temperature and load controlled fan | temperature and load controlled fan |
| Protection degree | IP21, horizontal wall mounting | IP21, horizontal wall mounting | IP21, horizontal wall mounting | IP21, horizontal wall mounting |
| Protections | over-temperature, overload, short circuit, high/low voltage, reverse polarity (fuse) | over-temperature, overload, short circuit, high/low voltage, reverse polarity (fuse) | over-temperature, overload, short circuit, high/low voltage, reverse polarity (fuse) | over-temperature, overload, short circuit, high/low voltage, reverse polarity (fuse) |
| MasterBus compatible | no | no | no | no |