power consumpstion don't judge by A/C or D/C. It all depend on the amp stated on the equipment
If item "A" is an A/C with consumption of 2amp it means 220V X 2 = 440W X 0.001 = 0.44kwh
If item "B" is an D/C with consumption 36.66amp it means 12V x 36.66 = 440W X 0.001 = 0.44kwh
And both have the same strong output wind power, but do take note for D/C fan with an 5amp and above are very noisy
but good about D/C fan is that they have a constant consumption, however seen technology is so great nowadays with go green program around the world
all our product build have the power limited future so it won't have much different.