Which of the following fuses would be the best selection for DC photovoltaic source and output currents?

The best selection for DC photovoltaic source and output currents is the PV-Solar, UL 248-19 fuse. This specific class of fuse is designed specifically for use in photovoltaic systems, accommodating the unique characteristics of DC power and the requirements presented by solar energy systems.

These fuses are intended to handle the complexities associated with solar applications, such as high inrush currents and the potential for different current ratings associated with varying sunlight conditions. By using a fuse that complies with UL 248-19, which is specifically engineered to work effectively in photovoltaic applications, safety and reliability are prioritized.

In contrast, the other types of fuses listed may not be suitable for the special demands of photovoltaic applications. They may have different current ratings, response times, and breaking capacities that do not align with the needs presented by solar energy systems. For instance, Class L and RK-5 fuses are typically used in industrial applications and may not be optimized for DC currents found in photovoltaic arrays. Edison plug fuses may also not provide the necessary safety features or appropriate ratings for modern solar installations.