Solar Panel to 12v fan

midijeep
midijeep Registered Users Posts: 102 ✭✭✭
in Solar Beginners Corner #1
I want to run a 12v dc fan with a panel.  I want to avoid the fluctuation of the panels power by connecting it directly to the 12v dc fan.  What do I put in between panel and dc fan to give the dc fan regulated power?
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  • 706jim
    706jim Solar Expert Posts: 526 ✭✭✭✭
    #2
    A battery
    Island cottage solar system with appriximately 2500 watts of panels, 1kw facing southeast 1.3kw facing southwest 170watt ancient Arco's facing due south. All panels in parallel for a 24 volt system. Trace DR1524 MSW inverter which has performed flawlessly since 1994. Outback Flexmax 80 MPPT charge controller four 467A-h AGM batteries. Insignia 11.5 cubic foot electric fridge 1/4hp GSW piston pump. My 31st year.
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  • BB.
    BB. Super Moderators, Administrators Posts: 33,716 admin
    #3
    You can use an oversized array (2+x larger than needed in wattage) and get a buck mode DC to DC converter (takes variable voltage/current input, fixed voltage (or current) output).

    https://www.amazon.com/s?k=dc+to+dc+buck+converter+switching+power+supply

    The larger the solar array, the less clouds will affect the fan speed, and the closer to sunrise/sunset you can operate the fans.

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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