Something that no-one appears to have mentioned (and this comes from someone who was a safety standards and certification compliance engineer in the electronics and defence industries for decades)!
In general, the wattage (&/or voltage and current) markings on the majority of electrical equipment and appliances (sometimes by a large amount!) overstate their actual power-draw requirements - in fact it's almost "mandatory" because the safety standards require that the marked ratings must not understate the power draw, but there is no requirement that they can't overstate it! (many companies for which I worked, and my own approach, took advantage of that "lack of clarity", "just to be safe")!
Therefore most manufacturers do "play safe" and overstate it, often by a large margin - if you are really worried, then get a plug-in power meter and measure how much power each appliance actually draws!
In general, the wattage (&/or voltage and current) markings on the majority of electrical equipment and appliances (sometimes by a large amount!) overstate their actual power-draw requirements - in fact it's almost "mandatory" because the safety standards require that the marked ratings must not understate the power draw, but there is no requirement that they can't overstate it! (many companies for which I worked, and my own approach, took advantage of that "lack of clarity", "just to be safe")!
Therefore most manufacturers do "play safe" and overstate it, often by a large margin - if you are really worried, then get a plug-in power meter and measure how much power each appliance actually draws!
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