Amtrak Solar 12-Inch Solar Attic Fan, Powerful 100 Watt Fan Quietly Cools Attic, Garage, or Greenhouse & Ventilates to Protect Against Moisture

Just installed this fan in my greenhouse, and so far it looks like it will be very effective. I was especially pleased to find out that you can reverse the cable connections to change the direction that the fan runs. That will be handy when I want to switch from blowing cool air in from the outside to exhausting the inside hot air out. (A built-in toggle switch would have been a nice touch though.) It reacts instantly to the amount of sun exposure on the panel, so fan speed is constantly adjusting on days where the clouds are abundant and moving across the sun. It does run fairly loudly when it's at full speed, but I think that somewhat reflects how powerful it is. The panel is of considerable size but was easy to install on the greenhouse roof. The positioning of the panel is permanent, and you can't adjust the angle, although with a little DIY and the right hardware you could probably mount it for adjustable angle. The materials and construction appear to be very sturdy. Solar power!.....that's 100 watts that won't have to be drawn from my limited electrical supply.

Bought this to keep my outdoor shed a little cooler. Using it as an exhaust fan. Works good why it worked....twice. This fan runs constantly runs during daylight hours except cloudy days. Two times it has quit and when I checked on it, both times the wire connectors had melted, once at the fan, second time at the solar panel outside mount on the roof. It needs a regulator or something. I think to much power is getting to it. This fan runs full blast at full sun.

The panel and fan function as they should. I purchased one with a 100-watt panel. The fan speed is more than sufficient to cool my 400-square-foot garage attic. Be aware that you might find it too noisy depending on the ambient. The extension cord is 16AWG, which seems to be at the borderline capacity. The instruction video shows the easiest but the riskiest way to mount the panel on the roof. To avoid leaks 100%, I used flashing mounts instead of drilling holes in the roof directly. Although it cost me approximately $200 in total for the mounts, conduit, and tools, on top of the product, I am happy that I did not cut corners. Update: The extension cord became hot, and plastic parts at the terminals were blackened. To be safe, I upgraded the cord to 12AWG with MC4 connectors.

The output of the fan airflow is very powerful.

I bought this solar panel and fan in February 2025, and it performed well for a few months. Unfortunately, a couple of weeks ago the fan burned out and my greenhouse now faces the onslaught of summer without a fan. The PV panel continues to produce good voltage. I have asked the company for a replacement and will report back if I get support from them.