Choosing the right power inverter really depends on how you intend to use it
, if you will always or frequently use it. If you will be using your inverter frequently, you may be better off hard-wiring it into the car. This means using a direct connection to your car battery. There are also lot of things to consider in choosing a power inverter like the model with more than one outlet. It can also be difficult to know what feature is important and how to appropriate use it according to your needs. Wattage, features and connections are the things to be taken for considerations.
For Power Inverters there are two general types, they are the true-sine wave and the modified-sine wave (or also called as square wave). True-sine wave power inverters produce power that is either identical or sometimes slightly better to power from the public utility power grid. It has a power wave form that appears as a smooth sine wave when viewed through an oscilloscope. While Modified-sine wave or Square wave power inverters is the common type of power inverters. It produce a power wave that is sufficient for most devices. The power wave is not exactly the same as electricity from the power grid. The wave form when viewed through an oscilloscope is a choppy squared-off wave.
Determining the best size of inverter you intend to use
How many outlets do you want? There are 1-3 outlets.
The flexibility and portability.
What equipment are you using in your car?
Why I need a power inverter anyway?
A power inverter allows you to use your electrical equipment in your car. It is great to have when you're traveling or during your vacation. We suggest that you choose a power inverter that are rated under 300 watts when you using the 12-volt cigarette lighter socket found in your car. In this case, modified-sine wave power inverter that operates through your cigarette lighter socket is best to use if you are using your laptop, camera, fan, and a/c cell phone charger.