DC battery and someone taps you on the shoulder and asks you to produce AC instead. How would you do it? If all the current you produce flows out in one direction, what about adding a simple switch to your output lead? Switching your current on and off, very rapidly, would give pulses of direct current—which would do at least half the job. To make proper AC, you'd need a switch that allowed you to reverse the current completely and do it about 50‐60 times every second. Visualize yourself as a human battery swapping your contacts back and forth over 3000 times a minute. That's some neat fingerwork you'd need! Simple animation illustrating the concept of a DC to AC power inverter.

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An inverter is an electrical device for converting 12-volt DC battery power into 120 volt AC power. Inverters are available in sizes ranging from as low as 30 watts up to 4,000 watts or more. For pratical purposes, an inverter size of 2,000-3,000 watts will be needed (or will already be installed) in an RV.

Power inverters have a wide variety of designs, capabilities, and features. Understanding their differences can be as simple as dividing them into two groups based on their cost.As far as the sine wave converters go, I wouldn't concern myself with it unless maybe you have some expensive music equipment like Robert mentioned. Most things that you will need an inverter for in a truck will operate just fine on the regular inverters. To get a sine wave inverter you will b