ecoCalm Solar Exhaust Fan for Greenhouse — 10" Battery-Backed Vent with Smart Thermostat, 660 CFM

ecoCalm Solar Exhaust Fan is a 10-inch, battery-backed solar ventilation unit with a smart thermostat and bifacial panels designed to move up to 660 CFM for greenhouses, sheds, attics, and small barns.

If you manage a greenhouse, outbuilding, or hobby farm and want a low-maintenance way to reduce heat and improve airflow without adding wiring or running costs, this solar-powered exhaust fan is built for that purpose. It combines a 5000mAh rechargeable battery, two transparent bifacial solar panels, and an intelligent temperature controller so the fan can run on solar power during the day and continue operating hours into low-light conditions.

How does the smart thermostat decide when the fan runs?

The built-in temperature control continuously monitors ambient air and automatically activates the fan when your set temperature is reached. You can adjust the on/off threshold to match plant or storage needs, so the unit works only when needed and conserves battery power.

• Programmable temperature threshold in the battery box
• Automatic switching between solar power and battery backup
• Prevents unnecessary runtime by responding to actual ambient temperature

What performance can I expect in terms of airflow and run time?

This 10" fan is engineered for strong airflow and efficient motor performance, rated at 660 CFM—adequate for ventilating spaces up to about 1,100 ft³. With a fully charged 5,000 mAh battery, the fan can continue circulating air for approximately six hours after sunlight fades, though actual runtime depends on fan speed and environmental conditions.

• 660 CFM airflow for rapid air exchange
• Suitable for greenhouses, attics, garages, sheds, and animal houses
• Approximately 6 hours battery-backed operation after full charge

How do the bifacial solar panels and battery work together?

The unit includes two transparent bifacial panels (each 15W) that harvest sunlight on both faces to boost generation efficiency—up to about 22W total in optimal conditions. The system charges the 5000mAh battery while powering the fan directly when sunlight is available; when light diminishes, the controller switches to battery power automatically.

• Two 15W transparent bifacial panels increase energy capture
• Intelligent power management shifts between solar and battery
• Performance varies with weather—cloudy days reduce charging speed

How weatherproof and easy to install is the fan?

The ecoCalm fan is built for outdoor and semi-outdoor use with IP44-rated blades and a long 14.8 ft cable to reach the solar panels or battery box. It mounts in a window or wall opening and comes ready for typical DIY installation, providing a versatile ventilation solution for many outbuilding types.

• IP44-rated fan blades resist rain and splashes
• 14.8 ft cable for flexible panel or battery placement
• Mounts in windows or exterior walls for quick installation

Who this is for: growers, hobby farmers, and homeowners who need a reliable, off-grid ventilation option for greenhouses, sheds, attics, small barns, or animal enclosures. It’s especially suited to users who prefer a low-maintenance, solar-first solution with adjustable temperature control and short-term battery backup instead of running electrical wiring or a noisy generator.