How do 12v, 24v, and 12v + 12V series connected car radiator fans compare in direct drive solar applications? What about connecting 2 12 volt fans in series? This is a bench test and comparison of 12v / 24v volt DC car radiator fans for solar powered shed ventilation. Rather than use a solar panel, I used a constant current constant voltage power supply. Solar panels are a current limited source, so their behavior can be simulated with a CC/CV bench power supply.
12v car radiator fans are cheaper and will run on a single 50 watt solar panel - but they don't match well in terms of efficiency. A DC converter can help, but it adds complexity. While 24v car radiator fans typically cost more than 12 volt fans, in theory shouldn't need a DC converter to run off of a 50 watt 12 volt solar panel. This video shows a scientific bench test in my solar workshop of both 12v, 12v + 12v in series and 24v car radiator fans.
The 24v fan is already running in my smaller shed in place of the original 12 volt fan, running straight off of a 50 watt solar panel. I call this PV-to-Load as it's an appliance connected directly to the solar panel array with no battery, no charge controller and no inverter. In this case, there is no DC converter either.
Note some of these fans might be called an "AC Condenser fan". But it's pretty much the same thing as a car radiator fan.
Hope this video helps you out. Note the really small fans can be cheaper, but they aren't as efficient. 12-14 inches is best for shed ventilation.
Solar Shed Ventilation - a great way to learn about solar power! Gain new DIY skills and leverage solar to do useful work on your property.
Be careful using any DC fan connected to a solar panel, as they usually don't have anything protecting or covering the blades. There should be a mesh covering or grille over the fan at all times while in operation.
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🟢 Check it out! My Complete Guide to Solar Shed Ventilation:
• SOLAR shed ventilation...
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🟢 Components Explained - Solar Shed Ventilation
• Solar Shed Ventilation...
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🟢 Solar Shed Ventilation - follow up on brushless DC fan install
• Low Voltage Solar Shed...
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🔗 The second fan installation in my other shed
• Low Voltage Solar Shed...
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🔗 Older video showing test of my first fan
• Update On Solar Shed V...
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🔗 Older shed video showing various solar stuff
• Solar Shed - LiFePo4 M...
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24v outdoor fan test with 50w solar panel
• 24v Solar Shed Ventila...
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//// Parts List for this video is below! ////
🟢 24v fans on Amazon - note these are affiliate links, I may receive a small commission if you use these links. Thank you :)
amzn.to/3viVqFI Several 24v car radiator fans
amzn.to/3TEhpQR 10 inch 24 volt
amzn.to/491tZ0Y 14 inch 24 volt car radiator fan
amzn.to/43nKNOq 10 inch 24 volt option 2
amzn.to/3UYuvb2 24v AC condenser fan option (shown in video)
amzn.to/3X34xUW 12 volt car radiator fan
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#shed #sheds #solar #ventilation
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15 сен 2024