Whether to use an inverter or a generator depends on the type of load and how often you will need emergency AC power. Generally, an inverter is more economical power alternative to run items under 1000 watts, suitable for small appliances, TVs, VCRs, DVD players and other low load devices. If you plan to operate a refrigerator, freezer, washer, dryer or well system, then a generator is a better choice. If your planned power consumption exceeds 2000 watts, you should choose a generator, as the draw in the battery will rapidly deplete its power. inverterreview.com