A 100-watt, 12-volt solar panel’s current output is determined by dividing its wattage by its voltage. Using Ohm’s Law (I = P/V), where ‘I’ represents current in amperes, ‘P’ represents power in watts, and ‘V’ represents voltage in volts, the calculated current output is approximately 8.33 amps. This is an ideal figure, representing the maximum potential current under perfect sunlight conditions (Standard Test Conditions – STC). Real-world conditions, including angle to the sun, temperature, and shading, will significantly impact actual current production.
Understanding a solar panel’s current output is crucial for system design and component selection. Properly sizing charge controllers, wiring, and inverters depends on accurate current calculations. This ensures system safety and efficiency. Historically, as solar panel technology has advanced, efficiency has increased, allowing for greater current production from panels of similar physical size. This advancement has driven down costs and made solar energy a more accessible power source.
