Basic panels output between 250 and 300 watts, mid-range panels produce 300 to 350 watts, and top-quality, high-efficiency panels can generate 350 to 450 watts or more. Most homeowners find the 300 to 400-watt range to be the best choice because it offers a good balance of price. Example: 5kW solar system is comprised of 50 100-watt solar panels. Alright, your roof square footage is 1000 sq ft. Can you put a 5kW solar system on your roof? For that, you will need to know what size is a typical 100-watt solar panel, right? To bridge that gap of very useful knowledge needed. One of the most common questions regarding solar panels is: How many watts does one solar panel produce? This question is significant for homeowners, businesses, and anyone considering solar energy as an alternative power source. While the answer depends on several factors, in most cases a single panel can generate enough electricity to power several devices or even an entire home. 5 kWh of energy per day, depending on local sunlight.