This solar powered fan kit runs entirely on sunlight, pairing a 25W adjustable-angle panel with four DC fans that move up to 440 CFM combined, so no grid wiring is needed. Tilt the panel to track the sun for steadier output, and let fan speed rise and fall with sunlight intensity, reaching up to 2668 RPM on bright days; there is no built-in battery, so it runs during daylight only. A double-layer metal guard keeps leaves and debris out while the IP65-rated build and tempered glass panel hold up in humid greenhouses and coops, running at around 45 dB. The fan measures 11.81 x 11.81 x 1.50 inches and the panel 17.72 x 13.78 x 0.63 inches, with the unit weighing 6.06 lbs. Included brackets, screws, anchors, and cable ties support roof, wall, or ground mounting for greenhouses, grow tents, chicken coops, and small shelters needing continuous air exchange.