Can my system produce power on a cloudy day?

Day-to-Day Energy Production

The impact of clouds on your system's daily energy production will be based on the type and duration of the cloud cover. On cloudy or rainy days, your system will produce less energy. Bright, clear days produce the most energy, especially if the angle of the sun is optimal and the temperature is cool (since solar systems work more efficiently in lower temperatures). If the weather is clear but production is low, there may be dirt, snow, shade, or other debris on the surface of the solar panels.