Quick Answer
States with the least peak sun hours for solar power include Alaska, Washington, Oregon, Minnesota, and New York, which receive an average of around 3-4 peak sun hours per day. These states are generally located at higher latitudes and experience more overcast days. Solar panel efficiency is impacted by reduced sunlight.
Understanding Peak Sun Hours
Peak sun hours (PSH) measure the total amount of sunlight a location receives per day, typically between 9 am and 3 pm. The United States is generally a sunny country, but peak sun hours vary significantly across states. For example, Hawaii averages around 5.4 PSH per day, while the lowest-lying state, Florida, averages around 4.5 PSH.
Top 10 States with Least Peak Sun Hours
Based on data from the National Renewable Energy Laboratory (NREL), the top 10 states with the least peak sun hours are: Alaska (1.4 PSH), Washington (3.1 PSH), Oregon (3.2 PSH), Minnesota (3.3 PSH), New York (3.3 PSH), Maine (3.4 PSH), Vermont (3.5 PSH), New Hampshire (3.5 PSH), Massachusetts (3.6 PSH), and Wisconsin (3.6 PSH).
Considering Solar Power in Low-Sun States
While states with low peak sun hours may present challenges for solar power, it’s essential to consider the long-term benefits of renewable energy. In these states, solar panel efficiency can be optimized using techniques such as tracking systems, which adjust the panel’s angle to follow the sun’s movement, or using high-efficiency solar panels specifically designed for low-light conditions. Additionally, energy storage systems can help to offset the reduced energy production during periods of low sunlight.
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