Quick Answer
Sufficient sunlight is available in most states for solar energy, but solar irradiance, or the amount of sunlight a location receives, varies. According to the National Renewable Energy Laboratory (NREL), the top 10 states for solar irradiance are in the Southwest, with Arizona and Nevada leading the way. Solar panels can still generate electricity in states with lower solar irradiance levels, but at a reduced capacity.
Solar Irradiance by State
Solar irradiance is measured in kilowatt-hours per square meter per day (kWh/m²/day). NREL’s database shows that Arizona receives an average of 7.19 kWh/m²/day, while states like Oregon and Washington receive around 2.5 kWh/m²/day. For comparison, the global average is around 3.8 kWh/m²/day. Understanding the solar irradiance of a specific location can help determine the feasibility of a solar energy project.
Solar Panel Efficiency
Solar panel efficiency plays a crucial role in maximizing energy production, even in areas with lower solar irradiance. High-efficiency panels can generate more electricity per hour of sunlight, making them ideal for locations with limited sunlight. For example, a high-efficiency solar panel with a 23% efficiency rating can produce more electricity than a standard 15% efficiency panel in the same conditions. This is especially important in states with low solar irradiance levels, where every percentage point of efficiency counts.
State-Specific Solar Energy Potential
While some states may have lower solar irradiance levels, they can still benefit from solar energy. For instance, states like Massachusetts and New York have implemented aggressive renewable portfolio standards, requiring a significant percentage of their electricity to come from solar power. In these states, solar energy is prioritized, and innovative technologies are being developed to maximize energy production. By adapting to local conditions and leveraging advancements in solar technology, even states with lower solar irradiance levels can capitalize on the benefits of solar energy.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.