RV Inverter is an equipment that takes the 12 Volt DC current from your batteries and converts them to 120 Volts AC current which is the standard electricity for household appliances. While the converter is a standard accessory to your RV, the inverter which can supplement your AC power needs is still optional.
RV Inverters are mainly of two types. The first kind produces a modified-sine-wave (MSW) as output and is also called square wave inverter as the output generated by these equipment look like a choppy squared off waves when viewed through an oscilloscope. This type of electricity is not the same as the one generated in our power grids, but is sufficient to power most of our appliances. The second type yields a true-sine-wave (TSW) output which is identical to the normal household current.
RV Inverter requirements that you have will depend on the devices that you want to run on it. Common devices like battery chargers, laptops, hair dryers, fans and some power tools will work on an MSW inverter. Depending on the TV model, you may get intermittent issues in the form of lines coming up through the pictures. If you have specialized equipment like oxygen concentrators, laser printers, equipment with variable speed motors and the like, it is better to go for the TSW type inverters.
RV inverters come in different sizes, ranging from 300 W to 3000 W. The size that you require depends on the load you want to put on it. To estimate the correct load, you can calculate your requirements in terms of the device wattage and get an inverter which is slightly larger in size. You should also be aware that your inverter relies on power from your batteries. The bigger the size of the inverter, more the power it is going to draw from your batteries.