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The Go Power! 300 Watt Pure Sine Wave Inverter (GP-SW300-12) converts 12 volt DC battery power into 110 VAC pure sine wave power with under 3% total harmonic distortion. It delivers 300 watts continuously with a 450 watt surge, and it feeds a dual GFCI outlet on the front panel. It is UL 458 listed and comes with a 4 foot DC cable fitted with Anderson Power Pole connectors.
It's sized for RVs, boats, vans and trucks where you want to run a TV, a laptop, phone chargers or chargers for cordless tools. The housing measures 9.3 x 6.1 x 2.8 inches and weighs 7.7 pounds.
The GP-SW300-12 puts out a pure sine wave at 110 VAC RMS. Go Power describes pure sine wave as the same clean power as a wall outlet, while a modified sine inverter can make sensitive electronics and some chargers buzz, run hot or fail. Efficiency runs 80% to 90%.
A 4 foot #10 AWG cable with Anderson Power Pole connectors plugs into the inverter's DC input, and its red and black leads go to your battery's positive and negative terminals. Go Power calls for a 40 A fuse in the positive lead, as close to the battery as possible.
The front panel carries a North American dual GFCI outlet. A chassis ground lug on the rear connects to the vehicle chassis with #8 AWG wire, to a boat's grounding system or to an earth ground in a fixed location. The neutral of the AC output is bonded to chassis ground inside the inverter.
The front rocker switch has ON, OFF and REMOTE positions. In REMOTE, the inverter runs only when its two remote terminals are connected, so you can wire a user-supplied two-wire switch, such as a toggle or light switch. Go Power recommends #18 gauge wire up to 150 feet long for this connection.
A solid green LED means AC power is OK. A fast red blink signals over-voltage protection, a slow red blink signals under-voltage protection, an intermittent red blink signals over-temperature protection, and solid red signals overload.
The inverter protects against overload, short circuit, reverse polarity (by fuse), over and under input voltage and over temperature. It sounds a low battery alarm at 10.5 V and shuts down at 10.0 V to protect the battery. It also shuts down above 15.0 V input. A thermostatically controlled fan handles cooling, and with the switch off the inverter draws no current from the battery.
RVs and campers. Run a TV or laptop and charge phones from your 12V house battery.
Boats. Power electronics from the house bank and bond the chassis ground lug to the boat's grounding system.
Vans and work trucks. Charge cordless tool batteries, phones and a laptop on the road.
A modified sine inverter puts out a stepped approximation of AC. Go Power says that is fine for tools, lights and resistive loads but can make sensitive electronics and some chargers buzz, run hot or fail. The GP-SW300-12 puts out a true sine wave for TVs, laptops and chargers.
Go Power's GP-ISW200 is a 12V pure sine inverter rated 200 watts with a 250 watt surge and two GFCI outlets. The GP-SW300-12 adds 100 watts of continuous power, raises the surge to 450 watts and includes battery cables. If a TV and a laptop might run at the same time, the extra headroom helps.
This model runs on 12V batteries and accepts 10.5 to 15 VDC. Extending the included cable can cause excessive voltage drop. If you extend it, go up one standard gauge size for every 3 feet you add, and keep the total cable length at 10 feet or less. A 10 foot run calls for 6 gauge wire. For a fused permanent install, Go Power suggests its GP-DC-KIT1 install kit. The negative DC input is connected to the chassis, so never install the inverter in a positive ground DC system. Reversed polarity blows the internal fuse and may permanently damage the inverter.
Choose a dry, cool and ventilated spot with at least 2 inches of clearance around the inverter, and keep the rear and bottom vents open. Do not install it in the battery compartment or anywhere gasoline fumes could ignite, and keep it within 10 feet of the batteries. Never connect the inverter and another AC source, such as a generator or shore power, to the same AC wiring at the same time. Go Power recommends an automatic transfer switch if you use more than one source.
Anything whose running watts stay under 300 and whose startup surge stays under 450 watts. Go Power lists laptops, a TV, chargers and small fans. It also warns that TVs and computer monitors may surge up to four times their rated power at startup, and some induction motors may not start.
Go Power estimates the inverter draws about 28 A from a 12V battery at full load. By that estimate, a 100 Ah 12V lithium bank runs it at full output for roughly 3.5 hours.
Go Power says repeated GFCI trips point to a ground loop. That happens when the inverter feeds equipment or a panel with neutral and ground bonded. Have a qualified technician inspect the system.
Turn the inverter off for 5 seconds, then turn it back on. If you wired a remote switch, you can reset faults with it the same way.
Go Power warrants it for 2 years against defects in materials and workmanship.
The Go Power! 300 Watt Pure Sine Wave Inverter gives your 12V system 300 watts of UL 458 listed pure sine power with a 450 watt surge, a GFCI outlet, a remote switch option and battery cables in the box. If you'd like help with fusing, grounding or battery sizing, the Outbound Power team is happy to help.
Go Power! 300 Watt Pure Sine Wave Inverter Specifications |
|
|---|---|
| Model | GP-SW300-12 |
| Output | |
| Continuous output power | 300 W |
| Surge rating | 450 W |
| Waveform | Pure sine wave, < 3% THD |
| Output voltage | 110 VAC RMS ± 3% |
| Efficiency | 80 - 90% |
| DC Input | |
| Nominal battery voltage | 12 VDC |
| Input voltage range | 10.5 - 15 VDC |
| No-load current | 0.26 A |
| Draw with switch off | None |
| DC input connection | Anderson Power Pole connectors |
| Outlets and Connections | |
| AC output | Dual GFCI outlet (North America) |
| Main switch | ON / OFF / REMOTE |
| Remote port | 2 terminals for a user-supplied 2-wire switch |
| Remote wire | #18 gauge, up to 150 ft (45.72 m) |
| Status indicator | Power status LED |
| Chassis ground | Rear lug, #8 AWG wire to vehicle chassis |
| Protection | |
| Protection | Overload, short circuit, reverse polarity (fuse), over / under input voltage, over temperature |
| Low battery alarm | 10.5 V |
| Low battery shutdown | 10.0 V |
| High input shutdown | 15.0 V |
| Fault reset | Switch off for 5 seconds, then on |
| Installation | |
| Included DC cable | 4 ft (1.22 m), #10 AWG |
| Inline fuse | 40 A in the positive lead, close to the battery |
| Cable extension | One gauge size larger per 3 ft (0.91 m) added |
| Total inverter cable length | 10 ft (3.05 m) maximum; 10 ft = 6 gauge |
| Clearance | 2 in (5.08 cm) around the inverter |
| Distance to batteries | 10 ft (3.05 m) maximum |
| DC system | Negative ground only |
| Physical | |
| Dimensions (L x W x H) | 9.3 x 6.1 x 2.8 in (237 x 155 x 72 mm) |
| Weight | 7.7 lb (3.5 kg) |
| Cooling | Thermostatically controlled fan |
| Operating temperature | -4°F to 104°F (-20°C to 40°C) |
| Storage temperature | -22°F to 158°F (-30°C to 70°C) |
| Neutral | Bonded to chassis ground |
| Certifications and Warranty | |
| Safety | UL 458 listed |
| Warranty | 2 years |
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