Ideal for your solar powered home. Sunsource 12v Ceiling Fans are high efficiency DC ceiling fans. Thanks to a thermal bridge concept the Phaesun ceiling fan for direct current outclasses AC fans by a factor of 4 to 6 in consumption and competing DC fans by more than a factor 2 when comparing the same air performance in the medium speed range. It is possible to use the Phaesun DC Ceiling Fans in 12 VDC systems and perfectly fit to these systems because of their low power consumption. Description: (12 VDC / 4 steps / max. speed 156 rpm) Dimension: 0 x 138 x 0 mm Weight: 3 kg