Large 12V DC Box Fan! (w/motor speed control!) Easy DIY. Full Instructions. fan is powered using a single 100 watt solar panel or 12v battery. pushes same amount of air as an AC box fan. Gan runs smooth and fast (super slow too – if you use optional motor speed controller).
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Total cost only $45 (add 12 for the speed control unit). Nothing like it on the market today so i decided to make one. Great project if you’re thinking of getting into solar power or off-gridding. Has lots of uses and is super easy to make.
Note that a lot of the projects i’ve built over the years make use of a 20″ AC box fan. now using this you can run all of those on solar too! fan is 21 1/4″ square and made with 2×6 lumber (actual 5.5″ x 1.5″) and 1/2″ plywood. The 4 small pieces in the corners are 2×3 lumber. Fan is very solid and runs smooth. no vibrations or shaking.I highly recommend getting the speed control device.
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It allows you to run the fan at any of 100’s of speeds and can extend the amount of time that it can be run on a battery. Average time fan will run on high with standard average size 100 ah deep-cycle 12v battery is about 5 hours. On medium it’s about 10 hours and on low about 20 or more. note also that on medium or low you can barely hear the motor.
