East vs West Solar Panel Orientation: Which Is Better?

Understanding Solar Panel Orientation

The orientation of solar panels is crucial for maximizing energy production and minimizing losses. East and west orientations have their own set of advantages and disadvantages. East-facing panels receive morning sunlight, which is ideal for producing electricity during the early hours of the day. In contrast, west-facing panels receive afternoon sunlight, which can be affected by shading from trees, buildings, or other obstacles.

Peak Sun Hours and Shading

East-facing panels typically receive more peak sun hours (PSH) than west-facing panels. According to the National Renewable Energy Laboratory (NREL), east-facing panels in the northern hemisphere receive around 4.5 PSH per day, while west-facing panels receive around 4 PSH per day. Shading is another critical factor to consider when choosing between east and west orientations. Trees, buildings, and other obstacles can cast shadows on west-facing panels during the late afternoon, reducing their energy production.

Maximizing Energy Production

To maximize energy production from solar panels, it’s essential to consider the specific site conditions, including the latitude, climate, and surrounding environment. In general, east-facing panels are a better choice than west-facing panels, but this may vary depending on the specific location. By carefully evaluating the site conditions and choosing the optimal orientation, homeowners and businesses can ensure that their solar panels produce the highest possible amount of electricity.