22W SOLAR PANEL: Our solar panels are equipped with high-quality monocrystalline solar cells, the conversion rate can reach 22%, the built-in current limiting module prevents the fan from being damaged by excessive current, while the stable current can greatly extend the lifespan of the fan. The solar attic fans are equipped with 12 feet of 20AWG (0.8mm diameter) copper wire which reduces energy loss, allowing the fan to work even in low sunlight. Brushless Fan: These DC solar fans are equipped with powerful brushless motors that are more stable, less prone to failure, run with less noise and last three times longer than broom fans. Its speed of up to 2,500 RPM provides excellent ventilation capabilities of the hangar. The removable front panel and check valve make the fan ideal for wall, glass and ceiling mounting. Adjustable Bracket: Solar panels require different positions and angles in winter and summer to make the most of solar energy. Our solar chicken coop fan set comes with