When considering the cost-effectiveness of installing a solar panel in a photovoltaic carport, several factors come into play. Here are some points to consider:

Energy Generation: Generally, larger solar panels have a higher power output and can generate more electricity compared to smaller panels. This means that a large solar panel would be more efficient in terms of energy generation.

Space Utilization: If you have limited space for a photovoltaic carport, smaller solar panels might be a better option. They allow for more flexibility in fitting the available space and can be arranged in a way that maximizes the use of the available area.

Installation Costs: The installation costs for both large and small solar panels can vary based on factors such as the number of panels, solar mounting systems, electrical components, and labor. In some cases, installing a few large panels might be more cost-effective than installing multiple small panels due to reduced installation complexity and infrastructure requirements.

System Scalability: Consider your future energy needs and expansion plans. If you anticipate the need for increased energy production in the future, it might be better to install a larger carport solar panel system from the start, even if it requires a higher initial investment. This allows for easier scalability and avoids the need for additional installation work in the future.

Incentives and Rebates: The cost-effectiveness of installing solar panels can also be influenced by available incentives, tax credits, and rebates offered by the government or utility companies. Some incentives may apply to the overall installed capacity, while others could be based on the number of panels or the system's energy production.

Ultimately, the most cost-effective choice between large and small solar panels for a photovoltaic carport depends on your specific circumstances, including available space, budget, energy requirements, and long-term plans. It is recommended to consult with a solar installation professional who can assess your situation and tailored advice.