Best Solar Power Greenhouse Fans

On summer days with the sun beating down it is not uncommon for outdoor structures like greenhouses and chicken coops to get overheated inside. The most practical solution is a greenhouse fan that can circulate the air around, forcing the hot air out and bringing cooler air in from the outside. Since these sorts of structures are often not wired for electricity, one of the best solutions is a solar powered greenhouse fan. The best solar powered greenhouse fans move enough air around to keep things cool without drawing a lot of power or making a lot of noise. Technology in solar panels has improved enough that gardeners can go green and use solar power to drive the fan and circulate air effectively. Some models even integrate rechargeable batteries so that they can continue to operate at night when the sun is down or if it hides behind the clouds. These greenhouse fans are all surprisingly light and easy to install, with no electrical or wiring experience needed to safely start ventilating and cooling your greenhouse.

Best Solar Power Greenhouse Fans

The best solar powered greenhouse fan is the Coolerguys 10W Solar-powered fan kit. It has two fans for maximum airflow and a smart design that makes mounting it easy. The ball-bearings of the fan have a lifespan of up to 67,000 hours while the fan itself is durable and rated IP67 waterproof so that a little water won’t ruin it. Putting out an air flow of up to 138 cubic feet per minute, the fan circulates air well while only producing minimal noise of up to 34 dB.

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The Runner Up on this list is the Cowin Solar Fan System. This system is noteworthy for its ability to store power and operate for several hours on a charge. Given its portable nature, this fan is also versatile and useful in various applications. With its medium-sized blades, the fan ventilates and cools the greenhouse in a short period of time.

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Budget Choice: Solar Power Greenhouse Fans

The Seddex 5W, 4-inch fan is our budget choice due to its ability to ventilate small greenhouses in an eco-friendly manner. Given the fan and the solar panel’s price, it is a great buy despite the smaller size and basic functionality that it offers. Provided that one is in an area with good sunlight, this small fan can work wonders.

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Solar Power Greenhouse Fans Buyer’s Guide

The technology behind solar powered greenhouse fans is improving quickly and they are now a feasible solution for any number of greenhouse, attic, dog house, or RV installations. These fans draw such low voltage that they can spin at high speeds even when the sun is not shining bright. They are the most inexpensive way to cool areas down inside and outdoors, similar to how you would use a greenhouse heater in the winter. When shopping for a solar powered greenhouse fan there are a few things to consider.

Fan Size

The primary determinant in how much air circulates is going to be the size of the fan blades and how fast they spin. A bigger blade will move more air and that can improve plant yield, but it is a trade off because it will also require more power to spin it. Most fans for small greenhouses range in size from 4 inch blades to 12 inch blades.

Power and Battery Life

All of the fans use an external solar power panel to generate electricity. Most of the fans push that electricity directly to the fan blades to make them spin but others use the energy to charge an integrated battery and that then powers the fan. Having an integrated battery will raise the price of the fan, but it also improves its capabilities and lets it run effectively at night. The amount of power generated is determined by the solar panels and they will have different capabilities and efficiency ratings depending on their size and design.

Mounting Options

Determining where to install your fan is often driven by several factors including exposure to the elements, available power, and safety. Considering where you want to install a fan before buying one is important to avoid trouble down the road. Many of the newer solar powered fans are light duty enough that they can be mounted and installed with simple zip ties. Taking some time to consider how and where you will use your solar powered greenhouse fan can save you money and hassle. After imagining what will work best for you, take a look at the fans reviewed below to find one that is a good fit. Each of the fans on this list can get the job done and has something special to offer when it comes to installation, power, or battery life.

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Solar Power Greenhouse Fans Reviews

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We have chosen the six best solar power greenhouse fans for you to consider. In these reviews we look at the key points and the details of each model so that you can compare them and decide which is the best choice for your greenhouse.

GOODSOZ 10W Solar Panel Fan

Key Points at a Glance

• Easy to use portable fan- 10W 5V solar panel unit with USB output to charge the fan or any other electronics- Solar panel and fan are waterproof- Power cord is 48 inches long- Amount of sunlight hitting the solar panel is directly proportional to the speed of the fan- Fan works best if the solar panel is placed perpendicular to the sun- Ideal for small greenhouses, camping tents, caravan, dog house, and chicken house

Dimensions and Specs

Fan size- 10'' x 9'' x 5''- Solar panel size- 10'' x 10'- Package weight- 2.2 pounds

The Goodzos greenhouse fan is a small, lightweight, and portable fan meant to ventilate and cool down a small greenhouse or chicken coop. The Solar panel is an efficient 10W 5V unit that can power the fan with ease and keep it spinning even in minimal sun. Being waterproof is a great plus for wet/ rainy areas around your yard. However, one needs to be cautious and ensure the USB port doesn’t get wet. The speed of the fan peaks only when an ample amount of sunlight is available. The fan provides good utility for other applications as well like for camping, a dog house, RV motor homes, etc. Operating and using the fan and solar panel is pretty straightforward- one just needs to place the panel perpendicularly under sunlight and then connect the fan to it via the USB port. The solar panel will not power the fan at night, due to the non-availability of sunlight. Another alternative to power it at night would be a rechargeable battery or power bank.

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Yingli Solar Table Fan

Key Points at a Glance

• Multi-purpose solar powered fan with 3 speed modes- Can be charged either through a 15w Solar Panel or by an AC100-240V adapter.- Offers circuit protection by preventing overcharging- 1-year seller warranty is included in the package- 12-inch blades offer higher airflow- Charging time is 4 to 5 hours- With a full charge, the fan can run for 12 hours at low speed, 8.5 hours at medium speed, and 4.5 hours at high speed

Dimensions and Specs

Fan- 18.5 x 15.7 x 5.3 inches- Product weight – 14.6 pounds- Solar fan voltage- 12V- Solar Fan charging power- 45W- Solar Panel current – 15W/ 18V- Solar Panel cable length- 6 meters- Compatible with two batteries- Lead-acid 6V/4.5Ah x 2 units or 11V/4.4Ah x 1 unit Lithium Battery- Charging current - AC 100-240V, 50/60 Hz. DC 18V

The Yingli Solar Table Fan is an ideal greenhouse fan for anyone looking to find a fan with a helpful rechargeable battery and a bright light included. The fan is made of ABS Plastic and it has a smart unit that can power integrated LED lights. The smart unit has overcharge protection for safety, and you also get the convenience of using an AC adapter to charge the fan as necessary. The fan has large 12-inch blades that do a great job of circulating air onto plants and around the greenhouse. The package includes one solar fan, one solar panel with 15W/18V capability, and an adapter. Charging the battery lets the fan operate for about 5 hours.

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Seddex 5W 4 inch Solar Fan

Key Points at a Glance

• Extremely compact fan with blades measuring just 4 inches- Supports 1.25 A of power- Ideal to ventilate a small greenhouse- Simple, uncomplicated design- The fan speed is directly proportional to the amount of sunlight received by the solar panel

Dimensions and Specs

Solar Panel power- 5W- Maximum fan power- 1.25 A- Product dimensions- 4 x 4 x 4 inches- Product weight – 14.46 ounces

The Seddex 4 inch solar fan is perfect and cost-friendly for small greenhouses with plants that require a minimum amount of airflow. The fan blades are just 4 inches long and are hence a little more limited at pushing air than some other options on this list. Still, the fan has good basic functionality and does the job it is supposed to. The amount of sunlight hitting the solar panel determines the power level of the fan - the brighter the light, the faster the fan spins and vice-versa. The included solar panel is waterproof and weatherproof, but caution still needs to be maintained when operating the fan in wet conditions. The shipping package includes one 4 inch fan and one 5W Solar Panel.

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Coolerguys 10W Solar Powered Dual Fan Kit

Key Points at a Glance

• Dual Fan blades provide 138 cubic feet of air per minute and can go up to 203 cubic feet per minute- Silent operation ensures just 34 dB of sound level- IP67 resistance makes the fan completely dustproof and waterproof- Solar Panel has an IP55 resistance- Ball bearings have a long life of up to 67,000 hours- Fan speed maxes with maximum sunlight of 13 watts- Two fans provide enough ventilation to a medium-sized Greenhouse

Dimensions and Specs

Fan speed hovers around 3000 RPM- Maximum airflow- 203 CFM- Maximum noise level at full speed- 45 dB- Rated Voltage12v- Bearing life: 67,000 hrs- Operating temperature range: -40 C to +70 C- Energy Draw: 12v/0.72A- Each Solar Panel size- 11.75" x 5.5"- Package weight- 2.22 Pounds- Suitable Greenhouse area- 414 cubic feet

This dual fan setup from Coolerguys offers some of the best value for money proposition one can get. It delivers the advantage of two fans in one easy to mount package all for the price of a single unit! The fans are easy to operate and whisper quiet at just 34db. This set can adequately circulate air in any small to medium-sized Greenhouse. However, no battery is included so the fans need constant power from the solar panel. Thus, they can’t work at night unless a separately charged battery powers them. Good design gives it strong environmental resistance and makes this set dustproof and water resistant (submerged up to 1m for 30 min).

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Cowin Solar Fan System

Key Points at a Glance

• 3 Speed modes on offer- The integrated battery makes it easy to use when there isn’t sunlight outside- 15W Solar Panel can be used to charge and power the fan- Overcharge protection included in the package- The fan can be used to charge other small electronic devices- 1-year warranty included in the package

Dimensions and Specs

Solar panel power15W/18V- 16.4-inch cable solar panel cable length- Fan power 35W DC12V that powers 16-inch blade- 1.3W LED lamps on the fan- Fan power backup: 8 hours at low speed and 4 hours at high speed- Fan Material: PP- Fan voltage: AC 220V- Total charging time: 5 hrs- Fan speed: 1000 RPM - 1350 RPM

The Cowin Solar Fan System is best suited for areas with less sunlight or areas that have frequent power cuts. The package includes the fan, solar panel, and a charger to charge the fan in case of the lack of availability of direct sunlight. Most importantly, the fan has a battery integrated into the stand so that it can hold a charge and operate for several hours without sunlight. The fan’s height can be adjusted, which can help in taller greenhouses and also reduce the labor required for installation. With its portable nature and integrated battery to hold a charge, the fan can be useful for circulating air at various places around a portable greenhouse.

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ECO-WORTHY 25W Solar Powered Fan

Key Points at a Glance

• Minimum voltage operation at 4V so low sunlight doesn’t hinder fan operation- Easily mounts in a shed or as a rooftop fan- Good fan motor produces little noise and consumes little power- The Solar Panel is 30W, enough to run the fan at high speeds

Dimensions and Specs

Maximum solar panel Power at STC: 30W- Maximum solar panel power voltage: 16V- Open size: 27.8*13.8*0.7 inches- Folding size: 13.8*13.8*1.5 inches- Voltage: 5V up to 36V- Operating voltage of the kit- 18V- Wire Length: 16ft/5m- Life Span of the motor: Greater than 10,000 running hours

The high-powered Eco-Worthy solar-powered fan is suitable for greenhouses, attics, and garages, with a relatively strong motor that produces enough power to ventilate, dehumidify, and cool a greenhouse in a short time. This is a compact but surprisingly powerful fan, and is an ideal choice for applications requiring rapid air flow. The package includes a 12 5/8 inch DC Solar Fan, a 30W Folding solar panel, a 16ft solar cable, and mounting brackets for the solar panel. This fan cannot run at night as it is completely solar dependent.

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Conclusion

The best solar powered greenhouse fans quietly provide good air circulation and consistent performance without drawing a lot of power. Fans need not be oversized or overpowered to get the job done in a small greenhouse or chicken coop, and the focus instead can be on fans that are quiet and relatively resistant to dust and water. Each of the solar powered greenhouse fans in this review can get the job done, but read the features of each carefully to find the one that is the best application for your unique situation.