Produce continuous stable output even in cloudy day. This panel is capable of meeting a wide range of applications where standard panels can be inconvenient to mount, such as on the curved roof of an airstream. The power output of the product is the data of the laboratory at a constant temperature and a constant light state. The actual output is affected by the brightness, temperature, and equipment load of the sun in the actual environment. Final power conversion rate is approximately: 30%.If item is defective after 3 months, you can still send it back to us. This item is in the category "Home & Garden\Home Improvement\Electrical Supplies\Alternative Energy Supplies\Solar Power Supplies\Solar Panels & Kits". The seller is "yinh11" and is located in this country: US. This item can be shipped worldwide.