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The Go Power! ASW-1200-12-TS is a 12 volt pure sine wave inverter with a built-in 30 amp automatic transfer switch. When shore or generator power is present, it passes that AC through to your panel. When the AC drops, it switches to inverting battery power in 20 milliseconds or less, so your outlets keep working without re-plugging anything.
Go Power calls the 1200 W model the compact choice for vans, truck campers and small trailers that run a coffee maker, TV and laptops. It is UL Listed to UL 458, PowerTrak compatible and covered by a 2-year warranty from Go Power.
The transfer relay is rated 30 A continuous and switches in 20 ms or less. In pass-through mode the inverter accepts 120 VAC nominal input (70 to 150 VAC, 57 to 63 Hz), and a 30 A automatically resetting breaker protects the AC input. A blue LED shows when AC pass-through is detected.
The inverter is rated 1200 W. It handles 1201 to 1440 W for up to 1 minute and peaks of 1441 to 2400 W for up to 3 seconds, which helps with hard-starting loads. Maximum surge current is 133 A.
Output is a pure sine wave at 120 VAC ±3%, with total harmonic distortion under 3% (tested at a 12.5 V battery with a resistive load). Maximum efficiency is 91%.
No-load current is 1.8 A or less, but in load sense mode the draw falls below 0.1 A. Load sense is off by default. Turn it on with the DIP switches (5 W or 45 W threshold, with an optional 10-minute interval) or from a PowerTrak display, which adjusts the threshold from 5 to 45 W in 5 W steps.
An RV-C port connects the inverter to a PowerTrak display (sold separately) to monitor DC voltage, AC output volts, amps, watts and frequency, FET temperature and fault codes. A built-in RV-C terminating resistor can be switched on when the inverter sits at the end of the network. The On/Off/Remote main switch also works with the ASW-R remote or an external switch on the enable terminals.
The low-voltage shutdown defaults to 10.0 V and can be set from 10.0 to 11.5 V on a PowerTrak display to suit your battery. Recovery follows 2.5 V above the shutdown point. A warning comes first at 11.0 V, and high-voltage protection trips above 16.5 V.
DC input protection covers reverse polarity, over-current, over-voltage and under-voltage, and a red LED flags reversed battery cables. The output is protected against short circuit and overload, and the unit shuts down if the heatsink passes 95 °C (203 °F). Dry contact terminals can drive an alarm or indicator light when a fault occurs.
Vans and truck campers. Run a coffee maker, TV and laptops on battery, then plug into shore power and let the transfer switch take over.
Small trailers. Hardwire it between the shore inlet and the AC panel so the outlets work the same at a campground or off-grid.
PowerTrak systems. Add it to an RV-C network with Go Power! Advanced Lithium Batteries and Go Power! | Dometic MPPT solar controllers.
Both are hardwire inverters with a built-in 30 A transfer switch and a 2-year warranty. The ASW-1800-12-TS is rated 1800 W with a 3600 W surge, which Go Power suggests if you run a microwave regularly. The 1200 W model is the smaller, lighter option.
The SSW-2000-12 offers 2000 W continuous and 4000 W surge with GFCI outlets on the case, but no transfer switch. The ASW-1200-12-TS trades output power for automatic shore-to-battery switching through your existing panel.
Use a 12 V battery bank only. Go Power estimates about 110 A of draw at full load and suggests at least 100 to 200Ah of lithium for sustained use, with lead-acid banks twice that size. The manual calls for #2 AWG copper rated 105 °C, each cable under 10 ft (3 m), and a 200 A Class T fuse or breaker within 18 in (45 cm) of the battery, plus a disconnect switch if you use a fuse. On the AC side, use 10 AWG copper rated 90 °C on a 30 A breaker, add branch-rated breakers in your panel, and keep pass-through current at or below 30 A.
Mount it indoors or in a dry compartment on a noncombustible surface, flat (base down or up) or on a wall in a horizontal position, never vertical, with 4 in (100 mm) of clearance around the vents. A neutral grounding screw sets whether the AC output neutral is bonded to ground; qualified personnel should set it to match local code. Go Power recommends a certified RV technician or licensed electrician.
No. It passes shore power through and inverts from the battery, but there is no charger. Go Power suggests keeping your converter or adding a charger, or choosing the AIC-2000-12-SL, which combines a 2000 W inverter, 100 A charger and 30 A transfer switch.
Go Power says any single appliance up to 1200 W, one high-draw item at a time, but not a rooftop air conditioner without a soft-start. From one Go Power! 100Ah Advanced Lithium battery (about 1,280 Wh at 90% inverter efficiency), it estimates about 1 hour 15 minutes for a 900 W coffee maker.
Set the main switch to Remote. In the On or Off position, the inverter ignores the remote switch.
The Go Power! 1200 Watt Advanced Sine Wave Inverter pairs 1200 watts of pure sine power with a built-in 30 A transfer switch, PowerTrak connectivity and UL 458 listing in a compact 7.5 lb unit. If you'd like help planning the AC and DC wiring for your rig, the Outbound Power team is happy to help.
Go Power! 1200 Watt Advanced Sine Wave Inverter With Transfer Switch Specifications |
|
|---|---|
| Model | ASW-1200-12-TS |
| Output | |
| Rated Power | 1200 W |
| Overload (Max. 1 Minute) | 1201 to 1440 W |
| Peak Power (Max. 3 Seconds) | 1441 to 2400 W |
| Peak Power (Max. 2 Seconds) | Above 2400 W |
| Output Waveform | Pure sine wave |
| Output Voltage | 120 VAC ±3% |
| Output Frequency | 60 Hz ±0.3 Hz |
| Total Harmonic Distortion | Under 3% (12.5 V battery, 120 VAC, resistive load) |
| Maximum Efficiency | 91% |
| DC Input | |
| Nominal Voltage | 12.5 VDC |
| Input Voltage Range | 10.0 to 16.5 VDC (±0.3 VDC) |
| Surge Current (Max) | 133 A |
| No-Load Current | 1.8 A or less (at 12.5 VDC) |
| Load Sense Mode Current | Under 0.1 A (at 12.5 VDC) |
| Under-Voltage Warning | Below 11.0 V (±0.3 V) |
| Under-Voltage Shutdown | Below 10.0 V (±0.3 V), programmable 10.0 to 11.5 V |
| Under-Voltage Recovery | Above 12.5 V (2.5 V above shutdown) |
| Over-Voltage Warning | Above 15.5 V (±0.3 V) |
| Over-Voltage Shutdown | Above 16.5 V (±0.3 V) |
| Over-Voltage Recovery | Below 13.5 V (±0.3 V) |
| Recommended DC Cable | #2 AWG copper, 105 °C rated, under 10 ft (3 m) per cable |
| Recommended DC Overcurrent Protection | 200 A Class T fuse or breaker |
| DC Terminal Torque | 60 in-lbf (6.9 Nm) |
| Transfer Switch | |
| Transfer Relay Rating | 30 A continuous |
| Transfer Time | 20 ms or less |
| AC Input Voltage | 120 VAC nominal (70 to 150 VAC) |
| AC Input Frequency | 60 Hz nominal (57 to 63 Hz) |
| AC Input Protection | 30 A breaker (automatically resets) |
| Outlets and Connections | |
| AC Connections | Hardwire input and output terminal blocks (line, neutral, ground), push-in |
| Recommended AC Wiring | 10 AWG copper, 90 °C rated, 30 A breaker |
| AC Strain Relief | Cable up to 0.59 in (15 mm) diameter |
| AC Output Breakers | None built in (install branch-rated breakers in the panel) |
| Main Switch | On / Off / Remote |
| Remote | Remote switch port for ASW-R (sold separately) |
| Enable / Dry Contact Terminals | External switch input; fault relay (NO, COM, NC) |
| Dry Contact Rating | 0.5 A at 125 VAC or 2 A at 30 VDC (resistive) |
| RV-C Port | Standard RV-C Molex connector, built-in terminating resistor switch |
| Monitoring and Settings | PowerTrak display (sold separately) |
| Load Sense | Off by default; DIP switch 5 W or 45 W, display 5 to 45 W |
| Indicators | Status LED, AC pass-through LED, reverse battery polarity LED |
| Neutral Grounding | Neutral-to-ground bonding screw (yes or no position) |
| Protection | |
| DC Input Protection | Reverse polarity, over-current, over-voltage, under-voltage |
| AC Output Protection | Short circuit, overload |
| Temperature Protection | Shuts down above 203°F (95°C) heatsink temperature |
| Physical | |
| Dimensions (W x H x D) | 8.94 x 3.39 x 13.62 in (227 x 86 x 346 mm) |
| Net Weight | 7.5 lb (3.4 kg) |
| Cooling | One fan (DC end) |
| Operating Temperature (Full Load) | -4°F to 104°F (-20°C to 40°C) |
| Operating Temperature (Derated) | 104°F to 140°F (40°C to 60°C) |
| Storage Temperature | -40°C to 70°C |
| Relative Humidity | 0 to 95%, non-condensing |
| Installation | Indoor or dry compartment; flat or horizontal wall mount, not vertical |
| Ventilation Clearance | 4 in (100 mm) around vents |
| Certifications and Warranty | |
| Safety Listing | UL Listed (UL 458) |
| EMC | FCC Class B |
| Warranty | 2 years |
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