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Originally Posted by Chance
Not necessarily. You should look at combined power consumption between 110-Volt device plus inverter versus a 12-Volt equivalent device. Some 12-Volt devices are not the most efficient, and it doesn't take much difference if inverter is in the 90% range. Granted an efficient 35-watt 110-Volt TV won't run efficiently on a lightly-loaded 1,000-watt inverter, but some 12-Volt TVs can pull over 100 watts which may be worse. Just saying that it's not as simple as saying that 12-Volt is always more efficient because it eliminates need for inverter.
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My statement was when powering the SAME device... and that device normally converts AC to DC with a 'brick' in the power cord... It should always be more efficient to run it direct from DC - even if a 'voltage stepper' is needed - than converting 12v DC to 110AC and back to 12-24vDC...
Appliances that take the 110v AC directly in to the unit obviously don't have that possibility of course.
If switching units - then yes - the wattage certainly needs to be compared... My 12v dc TV is lower watts - but also smaller size than the AC powered unit (no brick) it replaces when boondocking... Its completely hidden from view when not in use.
Quote:
Originally Posted by Chance
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The new coffee maker is a fraction the size and weight, and is rated at 800 watts on nametag...
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What brand/model did you get??