Quick Answer
Solar efficiency varies significantly across states due to differences in sun hours, with states like Arizona and Nevada receiving the most direct sunlight. States like Oregon and Washington receive much less, while states like California and Texas fall in between. The solar efficiency of a system is directly related to the number of sun hours per year.
Factors Affecting Solar Efficiency
When comparing solar efficiency across states with different sun hours, it’s essential to consider the impact of temperature, panel quality, and system design. In warmer climates like Arizona, high temperatures can reduce solar panel efficiency by up to 0.5% for every degree Celsius above 25°C. This can add up to a significant loss in energy production over the course of a year.
Optimal System Design for Varied Sun Hours
A well-designed solar system can help mitigate the effects of reduced sun hours in cloudier states. For example, a system with a higher wattage per panel can help compensate for lower sun hours, as more energy is produced per panel. Additionally, using a higher-efficiency panel can help increase overall system efficiency, even in areas with limited sun hours.
State-by-State Comparison of Solar Efficiency
A study by the National Renewable Energy Laboratory (NREL) found that the top five states for solar energy production per capita are Arizona, Nevada, Utah, New Mexico, and Colorado, all of which receive high levels of direct sunlight. On the other hand, the bottom five states are Oregon, Washington, Maine, New Hampshire, and Vermont, which receive significantly less sunlight. By understanding the unique solar efficiency challenges of each state, homeowners and businesses can design more effective solar systems to meet their energy needs.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.