Can I run this box fan off these solar panels? [240W Panels > 140W Fan]

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  • Naruto
    Junior Member
    • Aug 2021
    • 25

    #1

    Can I run this box fan off these solar panels? [240W Panels > 140W Fan]

    Hi All!
    I'm going camping in a few weeks, and have this box fan I'd love to be able to run during the day when the sun is blazing!
    Originally, I thought to build a battery - charge the battery by solar panel and run the fan off the 48V battery. It turns out I won't be able to receive the batteries in time, so I thought maybe I would be able to get decent performance out of the fan just running straight off two solar panels. I understand there is lots of energy loss converting from DC to AC comes with energy loss.
    Here are the items I am hoping to use:
    • Solar Panels - 2 x Newpowa 120W 24V Monocrystalline Solar Panel
    • Inverter - KRXNY 1000W Pure Sine Wave Power Inverter 48V DC to 110V 120V AC 60HZ
    • Standard AC Box Fan - 1.2A 120V @ maximum
    Below is the diagram for the setup I hope to achieve. I have heard that I should put some circuit breakers in between the connections.
    Thank you!!
    演示图.jpg
    Last edited by sdold; 10-18-2021, 09:37 AM. Reason: Removed links
  • Mike90250
    Moderator
    • May 2009
    • 16020

    #2
    Sorry no, the inverter won't work well directly from panels, it needs the battery to handle both surges and deficits.

    Some folks have had success with automotive radiator fans ( 12VDC ), running direct from panels. You would have to address the overvoltage issue somehow, of 24V panels feeding a 12V fan.

    Truck stops and trucker supplies have some selection of 24V fans too, likely less expensive than a 1kw pure sine inverter
    Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
    || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
    || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

    solar: http://tinyurl.com/LMR-Solar
    gen: http://tinyurl.com/LMR-Lister

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