Quick Answer
East-west split arrays are a worthwhile investment for off-grid systems, offering improved energy production and reduced shading, but they typically require a larger roof area and more complex installation.
Benefits of East-West Split Arrays
East-west split arrays involve dividing the array into two or more sections, with each section oriented east-west. This configuration significantly reduces shading between modules, allowing for increased energy production and improved system efficiency. By optimizing the panel layout, a 10-15% increase in annual energy production can be achieved, making east-west split arrays an attractive option for off-grid systems.
Installation Considerations
When installing an east-west split array, it’s essential to consider the roof’s dimensions, the number of panels, and their spacing. A minimum of 2-3 feet of clearance between each row is recommended to prevent shading and ensure proper airflow. Additionally, the panels should be mounted at an angle to allow for snow shedding and improved water runoff. A common rule of thumb is to use a tilt angle of 30-40 degrees for optimal snow shedding and energy production.
Cost-Effectiveness
While east-west split arrays may require a larger roof area and more complex installation, the increased energy production and reduced shading can offset the additional costs. In many cases, the payback period for an east-west split array is shorter than that of a traditional array, making it a cost-effective option for off-grid systems. By carefully planning and executing the installation, homeowners and off-grid operators can maximize their energy production and enjoy a more reliable and efficient system.
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