Frequently Asked Questions: What is a solar-powered exhaust fan? The exhaust fan is driven by a motor to rotate the blades to drive the airflow and circulate air. The purpose of the exhaust fan is to remove the heat, potentially harmful fumes, smells, moisture, and dust out, and circulate the air. Exhaust fans are commonly used in areas such as bathrooms, kitchens, and utility rooms to eliminate moisture, odors, fumes, or stale air. They are typically installed in walls, ceilings, or windows. Where are the intake and exhaust ports of the IUZEAI solar fans? The air will be intake from the front square grate and will be exhausted from the back round hole with the cover. Can the fan reach its maximum speed? Yes, the fan can reach its maximum speed of 1986 r/min.However, the maximum speed of the fan can only be reached when the solar panel can output at maximum power. The direct light intensity is 38000LUX, and the temperature is 26°. When these two conditions are met, the voltage and power output by the solar panel can reach the highest voltage and power. If the solar panel can not reach the highest power, the fans' speed may be lower than 1986 RPM. Are both fans and solar panels waterproof? Yes, The waterproof level of the solar panel is IP67, which means it prevents the intrusion of immersed water. It can still ensure that the solar panel will not be affected by severe weather such as heavy rain. The waterproof level of the fans is IP34, which means preventing the intrusion of splashing water. The fan can not be can't be soaked in water. The waterproof performance of solar panels is better than that of fans. Important Notes to use the solar-powered exhaust fan properly: Please note that the solar-powered exhaust fan is not designed with a built-in storage battery.So the fan can not work at night, on rainy days, and may work slowly on cloudy days.If you want it to work at night, on rainy or snowy days, please purchase an additional charger to plug in which you could find in the store.To maintain optimum operating efficiency, make sure your solar panel faces the direction of the sun. The angle is typically between 30 degrees and 45 degrees.The duration of sunlight and the temperature in the morning, middle, and evening will affect the voltage and power of the solar panel.The direct light intensity is 38000LUX, and the temperature is 26°. When these two conditions are met, the voltage and power output by the solar panel can reach the highest voltage and power.If there are obstacles on the solar panel blocking the sunlight, it will also affect whether the solar fan can operate at maximum power. Please clean up the obstructions on the solar panels in time to ensure the solar panels are fully exposed to the sunlight. Suitable for Various Scenarios The sun's altitude angle is different in 4 different seasons, and its position is different in the morning, noon, and evening. To make sure the solar fan can work with high efficiency, you'd better adjust the panel's direction to face the sunshine directly. IUZEAI solar panels can be just to different angles with the the help of the bracket. Pack List All suggestions are welcomed Listen to customers' voices carefully to develop products that can better suit customer needs. We believe our products can help our customers and solve their problems. Upgraded Material-long lasting Waterproof Longer Copper Wire 21.5% High Efficiency Solar Panel 1986 r/min High Speed Strong Airflow IUZEAI-Green energy, Green life What can you get: 1* 20W Solar Panel1*8inch Solar Powered Exhaust Fan1*Mounting Bracket1*A bag of Three Combination Screw&Wing nut(to install the bracket on the solar panel)1*A bag of Screws to install the fan on the wall1*A bag of Screws to fix the bracket1*User Manual Warm Tips for use and maintenance: Choose a suitable orientation to install the panel Adjust a suitable angle of the panel. The angle is typically between 30 degrees and 45 degrees. You can search for the best angle on the internet with your zip code. Keep the roof and area around the solar panel and fan clean, preventing your fan from mechanical failures. Periodically check the fan for damage Regularly Clean the Fan's Panels. Wipe the panel's surface often, especially if you live in a dry, dusty area, to prevent buildup. Check all wires to make sure there are no loose wire connections. 8inch Solar Powered Exhaust Fan Operating Voltage：12VMax Speed：1986 r/minMax Air Flow：430 CFMMax Ventilation Rate：285 M³/HNoise Level：36 dbIP Rating:IP34 waterproof Strong airflow and high speed, low noise, meet your heat dissipation and ventilation requirements. High-quality weatherproof material with a long-lasting life allows you to use it with no worry. Safety Protection Design The solar panel fan is designed with a protection net on the front side, to eliminate the risk of mis-touching the blades and being injured, and block the entry of Insects.Automatic shrink valve design in the back side of the fan to effectively block the entry of wind and rain.The air will be intake from the front square grate and will be exhausted from the back round hole with the cover. 16.4FT Longer Copper Wire We extend the length of the wire to meet the different customers' requirements. The total length of the fan's wire and panel's wire is up to 16.4ft. The wire is made of copper inside, with stronger electrical conductivity and longer service life.