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solar charger mppt / on - off

Discussion in 'Renewable Energy' started by sahu, Aug 27, 2013.

  1. sahu

    sahu Member

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    Which solar charger is best ?
    Mppt
    On off
    Or any other
     
  2. Joe G

    Joe G Member

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    It depends on what you need and have to accomplish. Kind of like asking if a tuxedo, jeans or shorts are best???
     
  3. sahu

    sahu Member

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    need for 180ah tubeler battry charging.
     
  4. dave

    Dave New Member

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  5. remon7

    remon7 Active Member

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    150 amp hour battery??
     
  6. NorthGuy

    NorthGuy Well-Known Member

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    MPPT is more efficient. It is, essentially, a buck converter with downconverts panel voltage to the battery voltage. So you get power equal to Vmp x Imp x 0.95 (efficency). But it is more expensive too.

    PWM (or on/off as you call it) simply connects panel to the battery, so you get power equal to Vbatt x Imp.

    So, if you have a lot of panels, go with MPPT. If you have little, the gain in efficiency will not warant higher cost.
     

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