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  • Solar Panel Rating

    I saw a 5 volt Solar Panel rated at 4 amp hours. This was confusing to me because most I see have volts and watts listed in the description. How does one get to watts from amp hours? I've searched online and just got confused.
    Bill

  • #2
    Amp hours is incorrect. Amps would be right. Let me guess is this a Chinese product. Sometimes they leave something to be desired with their verbiage.
    2.2kw Suntech mono, Classic 200, NEW Trace SW4024

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    • #3
      You get from volts and amps to watts by multiplying.
      5V, 4A would be 20W. That is power, and is useful for rating energy sources like generators and solar panels.
      To get from power to energy, as in rating a battery, you multiply by time.
      5V at 4 Amp-hours would be 20 watt-hours, equivalent to .02kWh, kiloWatt-hours.
      SunnyBoy 3000 US, 18 BP Solar 175B panels.

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      • #4
        Originally posted by inetdog View Post
        You get from volts and amps to watts by multiplying.
        5V, 4A would be 20W. That is power, and is useful for rating energy sources like generators and solar panels.
        To get from power to energy, as in rating a battery, you multiply by time.
        5V at 4 Amp-hours would be 20 watt-hours, equivalent to .02kWh, kiloWatt-hours.
        Thank you for the explanation.
        Bill

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