Solar system rating
The Wattage rating of a solar panel is the most fundamental rating, representing the maximum power output of the solar panel under ideal conditions. You’ll often see it referred to as “Rated Power”, “Maximum Power”, or “Pmax”, and it’s measured in watts or kilowatts peak (kWp). Solar panels receive their ratings under specific testing conditions known as "Standard Testing Conditions" or "STCs". , 12 Volts or 24 Volts), but these voltages are only used as a reference for designing solar systems.
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