The GP-SW3000 from Go Power!...
The GP-SW3000 from Go Power! is the ultimate choice for large loads that demand an exact replica of household AC power. The GP-SW3000 can run any tool or appliance within its wattage range.
Power inverters are potentially hard on batteries. The length of time an inverter can supply power depends on the size of the battery or batteries and the number of appliances. A single, weak battery under heavy load can quickly discharge, perhaps in an hour or less, shortening the life of the battery and potentially stranding your vehicle. To avoid this, when the inverter is used with the engine off, it is best to start the engine periodically and let it run for 15-20 minutes to recharge the battery.
Deep-cycle batteries tolerate discharge better than ordinary car batteries, so they are a good choice for use with power inverters. A better solution is to connect one or more deep-cycle auxiliary batteries in parallel configuration and power the inverter from those.
Some power inverter manufacturers also make solar panels that can supplement the capacity of the vehicle's alternator and help recharge the battery over time.
Terminology
Learning a little bit of the lingo goes a long way. Here are some terms that may make your research more enjoyable.
Converter: A device that converts AC to DC power, sometimes called a power supply.
Continuous Power Rating: Power supplied continuously once loaded. The higher the wattage rating, the more appliances can be run.
Input Voltage: The voltage required to operate the inverter. Since most vehicles run on 12V battery power, most inverters are designed to operate on 12V. However, some vehicles, such as trucks and military vehicles, operate on 24V electrical systems, requiring an inverter specifically developed for 24V sources. Just make sure the inverter you choose is consistent with the electrical system on the vehicle you have.
Inverter: A device that converts DC (12V) to AC (120V).
Modified Sine Wave Inverter: Also known as a square sine wave inverter, an inverter that produces current with waves that look squared off when viewed on an oscilloscope. Should cost less.
No-Load Power Drain: The amount of power an inverter drains from the battery when it is connected but without an appliance drawing current. Less amperage is better.
Power Efficiency: The amount of 120V power delivered for every unit of 12V power taken from the battery, as expressed in a percentage. Higher percentage is better; a good inverter should pass through more than 90 percent overall, with minimal variation at all load levels.
Pure Sine Wave Inverter: Also called a true sine wave inverter, an inverter that reproduces the grid power supplied by local utility companies without spikes or jumps. Costs more.
Surge Power Rating: Usually about twice the continuous power rating, surge power is the output supplied to start an appliance. Higher wattage is better.