Powering a single Device with 2 energy sources

Discussion in 'The Projects Forum' started by iONic, Nov 17, 2007.

  1. iONic

    Thread Starter AAC Fanatic!

    Nov 16, 2007
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    Is there a way to power a device with Primarily solar, but in addition, when the situation occurs, with battery power as well?

    In other words, If the solar energy is not sufficient, add the additional power from onboard batteries, NiMH, Lithium ion...
     
  2. GS3

    Senior Member

    Sep 21, 2007
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    That's easy and, in fact, it is what is normally done. The solar cells are dumping into the battery when they are active while the device is powered from the battery all the time. Same thing.
     
  3. iONic

    Thread Starter AAC Fanatic!

    Nov 16, 2007
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    Please elaborate!
     
  4. Gadget

    Distinguished Member

    Jan 10, 2006
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    The batteries provide the power to the device while the solar cells charge the batteries.
     
  5. Salgat

    Active Member

    Dec 23, 2006
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    Would you just place the Solar Cell in parallel with the battery with a diode to prevent current from passing back into the cell?
     
  6. Gadget

    Distinguished Member

    Jan 10, 2006
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    In some cases yes, although it is good practice to put a solar regulator between the solar panel and the battery, especially if it is a higher power or 36 cell 12v panel, to prevent overcharging the battery.
     
  7. thingmaker3

    Retired Moderator

    May 16, 2005
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    A common set-up is to have a photo-voltaic panel charging the batteries through the regulator Gadget describes. The batteries then feed an inverter to provide AC for common household conveniences.

    The inverter is the usually weak link in the chain. If your device is DC, then no inverter is needed, of course.
     
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