Quick Answer
To achieve optimal performance, solar panels connected to PWM controllers should ideally be placed facing true south with an angle of 30-45 degrees, and ideally at least 10 feet off the ground to minimize shading.
Solar Panel Positioning
When positioning solar panels connected to PWM controllers, it’s essential to minimize shading, which can significantly reduce their efficiency. Direct north-south orientation is ideal, but a slight deviation to true south will still provide excellent results. The recommended angle for solar panels in the northern hemisphere is between 30-45 degrees, taking into account local roof angles or mounting systems. A steeper angle may lead to shading issues during winter months, while a shallower angle may result in reduced efficiency during summer months.
Avoiding Shading and Obstructions
Ensure that the solar panels are at least 10 feet off the ground to prevent shading from trees, branches, or neighboring structures. Regularly inspect the surrounding area for potential obstructions and adjust the panel position accordingly. For systems with multiple panels, arrange them in a way that prevents shading from one panel to another.
PWM Controller Requirements
Keep in mind that PWM controllers can handle a maximum voltage, typically around 20-30 volts. To ensure optimal performance, ensure that the solar panel output remains within this voltage range. For a single-panel system, a 12-volt or 24-volt PWM controller is usually sufficient. In multiple-panel systems, use a higher-voltage PWM controller and consider using a charge controller with a voltage regulator to prevent overcharging.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.