A tool for converting the power output of photovoltaic modules (expressed in watts) into current (expressed in amperes) is essential for system design. This conversion requires knowledge of the system’s voltage, as power, voltage, and current are inter-related. For example, a 400-watt panel in a 12-volt system will produce approximately 33.3 amps (400W / 12V = 33.3A). However, in a 24-volt system, the same 400-watt panel would produce approximately 16.7 amps.
Understanding the current produced by a solar array is crucial for selecting appropriately sized wiring, charge controllers, inverters, and other balance-of-system components. Incorrectly sized components can lead to system inefficiency, overheating, and even fire hazards. Historically, these calculations were performed manually, but online tools and dedicated software now simplify the process and improve accuracy. This readily available computational capability empowers users with a deeper understanding of their solar energy systems, facilitating optimized design and performance.