When sizing a generator, what percent of the generator's capacity should the load ideally be?

When sizing a generator, it is typically recommended that the load should ideally be no less than 75% of the generator's capacity to ensure efficient operation and longevity. Generators are often designed to operate at an optimal efficiency point closer to their full capacity. Operating a generator at significantly lower loads can lead to issues such as inefficient fuel consumption, increased wear and tear, and the potential for issues like carbon buildup in the engine or other operational inefficiencies.

While maintaining a load at 50% of capacity might be acceptable in certain scenarios, it does not reflect the ideal operational range that maximizes efficiency and performance. Operating at 75% capacity helps ensure that the generator remains within its optimal performance range, balancing the necessity for reliability with the ability to handle peak loads without overstraining the system. Therefore, aligning with the recommendation of 75% load capacity supports the generator's effectiveness and longevity in a real-world application.