What Are Solar Powered Dehumidifiers?

Written By: | Last Updated on: June 28, 2023

With the increasing prices of energy and a growing concern for the environment, solar dehumidifiers emerge as a practical and sustainable solution to tackle indoor humidity. 

These innovative devices harness solar energy, converting it into heat to effectively remove excess moisture from the air, promoting a comfortable and healthy living space. 

In this article, I will explore the fascinating world of solar dehumidifiers, delving into their inner workings, installation process, and the advantages and disadvantages of using them. 

I’ll also discuss the key factors to consider before purchasing a solar dehumidifier for your home or workspace.

Key Takeaways 

  • Solar dehumidifiers use solar energy to control humidity levels, making them energy-efficient and environmentally friendly
  • They consist of a solar collector, an air circulation system, and a desiccant material to absorb moisture
  • Installation involves selecting an optimal location for the solar collector, positioning the dehumidifier, and connecting the two components
  • Advantages include energy efficiency, improved air quality, cost savings, low maintenance, versatility, and reduced noise pollution
  • Disadvantages include limited effectiveness during cloudy or rainy days, high initial costs, complex installation, and limited availability and model options

How Does a Solar Dehumidifier Work?

The solar dehumidifier features a solar collector, which is responsible for capturing sunlight. 

This collector is typically mounted on the roof or placed in a location with optimal sun exposure. 

It is made of materials that absorb sunlight and convert it into thermal energy, or heat. 

So. it plays a crucial role in the functioning of the dehumidifier, as it provides the energy necessary for the moisture removal process.

To manage humidity levels effectively, the solar dehumidifier utilizes an air circulation system. 

This system draws humid air from the surrounding environment and directs it toward the unit. 

Fans are typically used to facilitate the flow of air through the dehumidifier, ensuring that the air comes into contact with the moisture-absorbing components within the unit.

Inside the dehumidifier, there is a desiccant material that absorbs moisture from the incoming air. 

Desiccants are substances with a high affinity for water and can effectively remove moisture from the air. 

Common desiccant materials used in solar dehumidifiers include silica gel, activated alumina, and molecular sieves. 

The thermal energy collected by the solar collector is used to heat the desiccant material, which helps to evaporate the absorbed moisture. 

As the desiccant is heated, the moisture it has collected is released in the form of water vapor. 

This process regenerates the desiccant, allowing it to continue absorbing moisture from the air and maintain a comfortable humidity level in the environment.

Once the water vapor is released from the desiccant, it needs to be cooled and condensed back into liquid water. 

This condensed water is collected in a tank or reservoir within the dehumidifier. 

Some solar dehumidifiers are also equipped with a drain hose attachment, allowing the collected water to be directly drained away without the need for manual emptying.

After the moisture has been removed from the air, the now-dry air is released back into the environment. 

This helps to maintain a comfortable humidity level and prevent issues like mold and mildew growth. 

How to Install a Solar Dehumidifier?

The first step in the process involves choosing a suitable location for the solar collector. 

You should place this component ideally in an area that receives maximum sunlight exposure throughout the day. 

This ensures optimal energy collection, which is critical for the dehumidifier’s performance. 

After selecting the ideal spot for the solar collector, the next phase is its installation. 

Depending on the design of the solar collector, you might need to mount it on the roof or attach it to a wall. 

It’s vital to ensure the solar collector is securely fastened and angled towards the sun to maximize sunlight absorption. 

Each collector comes with specific mounting instructions and hardware requirements from the manufacturer, and you should follow these closely.

With the solar collector in place, the next step is to position the dehumidifier unit in the area where you aim to control humidity. 

It’s important to choose a location with ample space for air circulation around the unit and where it can be easily accessed for maintenance purposes. 

Stability is also crucial, so ensure that the unit is placed on a level surface to prevent any operational issues.

Once you appropriately position both the solar collector and dehumidifier unit, the two components need to be linked. 

This connection typically involves using the cables and hoses provided to connect the solar collector to the dehumidifier unit. 

The cables transfer the thermal energy harvested by the solar collector to the dehumidifier, while the hoses might facilitate the flow of air or condensate, based on the system’s design.

The final step in the installation process is testing the solar dehumidifier system. 

By turning on the dehumidifier and letting it run for a while, you can assess its functioning. 

I actually recommend closely monitoring the system’s performance, checking for any signs of operational issues or inefficiencies. 

If any problems are noticed, you should refer to the user manual or get in touch with the manufacturer for assistance.

What Are the Advantages of Using a Solar Dehumidifier?

There are several advantages of using a solar dehumidifier over traditional electric dehumidifiers, making them an appealing choice for many people looking to control humidity levels in their indoor spaces. 

Some of the key benefits include:

  • Energy Efficiency: Solar dehumidifiers utilize solar energy to power their operation, which reduces electricity consumption. By relying on a renewable energy source, they offer a more energy-efficient solution compared to traditional electric dehumidifiers, leading to lower energy bills and a reduced carbon footprint
  • Environmentally Friendly: Since solar dehumidifiers rely on solar energy, they contribute to a greener and more sustainable future by reducing the demand for fossil fuels and decreasing greenhouse gas emissions
  • Improved Air Quality: By reducing humidity levels, solar dehumidifiers help prevent the growth of mold, mildew, and dust mites, which can cause allergies and respiratory issues
  • Cost Savings: Although the initial cost of a solar dehumidifier may be higher than a traditional electric dehumidifier, the long-term savings can be significant. Additionally, some governments and utility companies offer incentives and rebates for using solar-powered devices, further reducing the overall cost
  • Low Maintenance: Solar dehumidifiers require less maintenance compared to their electric counterparts. There are no moving parts in the solar panels, reducing the risk of mechanical failures. The main maintenance tasks include cleaning or replacing air filters and emptying the water tank or ensuring proper drainage, which is relatively simple to perform
  • Versatility: Solar dehumidifiers can be used in various settings, including residential, commercial, and industrial spaces. They are particularly suitable for off-grid locations or areas with limited access to electricity, such as remote cabins, boats, or RVs
  •  Reduced Noise Pollution: Many solar dehumidifiers have quieter operation compared to electric dehumidifiers, as they don’t rely on compressors for cooling. This makes them an ideal choice for bedrooms, offices, or other noise-sensitive areas

What Are the Disadvantages of Using a Solar Dehumidifier?

While solar dehumidifiers offer numerous benefits, they also have a few potential drawbacks to consider. 

Here are some of the main disadvantages of using a solar dehumidifier:

  • Limited Effectiveness During Cloudy or Rainy Days: Solar dehumidifiers rely on sunlight to generate the heat necessary for the dehumidification process. Therefore, their effectiveness can be reduced during cloudy or rainy days when sunlight is limited. In such conditions, a solar dehumidifier may not operate at its full capacity, leading to less efficient humidity control
  • High Initial Costs: The cost of purchasing and installing a solar dehumidifier can be significantly higher than a conventional electric dehumidifier. This is due to the inclusion of the solar collector and the specialized design of the unit
  • Complex Installation: Installing a solar dehumidifier can be more complex than a standard dehumidifier. It involves setting up the solar collector in a location with optimal sun exposure, connecting the collector to the dehumidifier, and ensuring the system works efficiently. This may require professional assistance, adding to the overall costs.
  • Limited Availability and Model Options: As of now, solar dehumidifiers are not as widely available as their electric counterparts. There may be limited model options to choose from, and finding replacement parts or getting the unit serviced could be more challenging

What Are the Factors to Consider Before Buying Solar Dehumidifiers?

1. Size of Your Room

When you’re thinking about getting a solar dehumidifier, one of the first things to consider is the size of the room where you plan to use it. 

The size matters because it directly affects how well the dehumidifier can control the humidity levels in the space.

Dehumidifiers have different capacities, which tells you how much moisture they can remove from the air in a day. 

This is measured in pints. Basically, the larger the room and the more air there is, the higher the capacity of the dehumidifier should be to effectively lower the humidity.

To be more clear, let’s work with an example. 

Imagine you have a medium-sized living room that is around 500 square feet

In this space, you might encounter moderate to high humidity levels, especially if the room is adjacent to a kitchen or bathroom, or if you live in a region with a humid climate. 

In this scenario, you would need a dehumidifier with a capacity of around 20-30 pints per day to effectively manage the humidity levels.

But let’s consider a different situation.

Suppose you have a small bedroom that is only 200 square feet, and the humidity levels are relatively low. 

In this case, a dehumidifier with a capacity of 10-12 pints per day might be more than enough to maintain a comfortable environment.

2. Humidity Control Requirement

The humidity control requirement refers to the level of moisture management needed in a specific space. 

This varies depending on factors like the room’s function, the local climate, and other elements that contribute to the moisture levels in your space.

Different solar dehumidifiers have distinct humidity control settings, allowing you to choose the desired humidity level for your room. 

The local climate plays a significant role in determining the humidity control requirement. 

If you live in a region with a naturally humid climate, such as coastal areas or regions with heavy rainfall, you’ll likely require a dehumidifier with more robust humidity control settings to maintain a comfortable environment.

The function of the room can also impact the humidity control requirement. 

Spaces like bathrooms, kitchens, and laundry rooms typically have higher humidity levels due to moisture-generating activities like cooking, bathing, and washing. 

In these areas, having a dehumidifier with efficient humidity control is crucial to prevent mold and mildew growth.

Basements and crawl spaces often have high humidity levels due to their proximity to the ground. 

Effective humidity control in these areas is essential to prevent dampness, mold growth, and potential structural damage. 

Additionally, if your space already has moisture-related problems, such as dampness, mold growth, or musty odors, you’ll need a solar dehumidifier with adequate humidity control to improve the room’s overall air quality.

Personal comfort is another factor to consider when determining humidity control requirements as individual preferences for humidity levels can vary. 

Some people may prefer slightly higher humidity levels for comfort, while others may find drier conditions more agreeable. 

A solar dehumidifier with adjustable humidity control settings can accommodate these personal preferences.

So, understanding your specific humidity control requirements will help you choose the right solar dehumidifier for your needs, ensuring a comfortable, healthy, and energy-efficient living environment.

3. Noise of Operation

Dehumidifiers, like other appliances, produce some level of noise while they are operating. 

This noise is usually generated by the fan and the compressor, which work together to remove moisture from the air.

The noise level of a solar dehumidifier can impact the overall comfort and enjoyment of your space, especially if you are sensitive to sound or if the dehumidifier will be placed in a quiet area, such as a bedroom or an office. 

Noise levels are typically measured in decibels (dB), with lower values indicating quieter operation.

When comparing different solar dehumidifiers, it’s essential to check their noise ratings. 

I recommend you never settle for more than a noise level of 50 dB. This level is generally considered to be relatively quiet, making it suitable for use in living spaces or other areas where quiet operation is preferred.

Some dehumidifiers also come with multiple fan speed settings, which can help you control the noise level according to your needs. 

For example, you may choose to run the dehumidifier at a lower fan speed during the night or when you need a quieter environment, and switch to a higher fan speed when noise is less of a concern.

4. Defrosting Features

Defrosting features are an important consideration when choosing a solar dehumidifier, especially if you live in a colder climate or plan to use the dehumidifier in an area where temperatures can drop below freezing.

During operation, a dehumidifier collects moisture from the air, and this moisture can freeze on the unit’s components, such as the evaporator coils. 

When ice builds up on the coils, it can hinder the dehumidifier’s performance and reduce its efficiency in removing moisture from the air.

To address this issue, many modern solar dehumidifiers are equipped with defrosting features. 

These features help prevent the formation of ice by periodically melting any ice that has accumulated on the coils.

Defrosting typically occurs automatically and is triggered by sensors that detect the presence of ice. 

When the sensors detect ice buildup, the defrosting feature activates, temporarily suspending the dehumidification process. 

The unit’s heat source is then directed to the coils to melt the ice. 

Once the ice has melted, the dehumidifier resumes its normal operation, effectively removing moisture from the air.

The frequency and duration of defrost cycles can vary depending on the specific model and ambient conditions. 

Some dehumidifiers have intelligent defrosting systems that adjust the defrost cycle based on factors such as temperature and humidity levels to optimize performance and energy efficiency.

5. Automatic Turn-off Feature

An automatic turn-off feature provides convenience and energy efficiency by automatically shutting off the dehumidifier when certain conditions are met.

There are typically two main conditions that trigger the automatic turn-off.

The first condition is when the desired humidity level is reached. 

The dehumidifier is equipped with a built-in humidistat that measures the humidity levels in the room. 

Once the desired humidity level is achieved, the dehumidifier will automatically turn off to conserve energy. 

This ensures that the dehumidifier operates only when necessary and helps maintain a comfortable environment.

The second condition is when the water tank of the dehumidifier is full. 

When the tank reaches its maximum capacity, the dehumidifier will shut off to prevent overflow and potential water damage. 

This feature is especially useful when you are unable to regularly monitor the water tank’s status.

It’s worth noting that some solar dehumidifiers may also have additional features that complement the automatic turn-off function. 

For example, they may have an indicator light or an audible alarm to alert you when the water tank is full, prompting you to empty it. 

Some models even offer the option for continuous drainage, allowing you to connect a hose to the dehumidifier, which automatically drains the collected water without the need to empty the tank manually.

6. Voice Assistant Support

Voice assistant support is an increasingly popular feature in modern appliances, including solar dehumidifiers. 

This feature allows you to control and operate the dehumidifier using voice commands through compatible voice assistant devices, such as Amazon Alexa or Google Assistant.

With voice assistant support, you can conveniently control your solar dehumidifier without the need for physical buttons or remote controls. 

By simply speaking commands to your voice assistant device, you can turn the dehumidifier on or off, adjust settings, and monitor its operation, all with hands-free convenience.

To utilize voice assistant support, you need to connect your solar dehumidifier to your home’s Wi-Fi network and integrate it with your voice assistant device. 

This integration enables seamless communication between the dehumidifier and the voice assistant, allowing you to issue commands and receive feedback or status updates.

The benefits of voice assistant support in a solar dehumidifier are numerous. 

For example, it offers enhanced accessibility, especially for individuals with mobility limitations or those who prefer a more intuitive and effortless control experience. 

Voice commands provide a hands-free operation, allowing you to adjust settings or check the dehumidifier’s status while engaged in other activities.

Voice assistant support also adds to the convenience and ease of use. 

For example, if you want to turn on the dehumidifier before entering a room or adjust the settings from a distance, you can simply give voice commands to your voice assistant device, without the need to physically interact with the dehumidifier.

Additionally, integrating your solar dehumidifier with a voice assistant device opens up possibilities for automation and smart home integration. 

You can create routines or schedule commands, allowing the dehumidifier to operate automatically based on your preferred settings or specific conditions. 

For instance, you could set the dehumidifier to turn on when the humidity levels exceed a certain threshold or synchronize it with other smart devices in your home for enhanced energy management.

But it’s important to note that not all solar dehumidifiers come with voice assistant support.

So if this feature is of interest to you, make sure to check the product specifications or inquire with the manufacturer before making a purchase.

7. Drain Hose Attachments

Drain hose attachments provide an alternative method of water drainage.

They allow you to connect a hose to the dehumidifier and direct the collected water to a drain or another suitable outlet.

The primary purpose of drain hose attachments is to eliminate the need for manual emptying of the dehumidifier’s water tank. 

Instead of regularly monitoring the tank’s water level and emptying it, you can set up a drain hose attachment to ensure continuous drainage of the collected water.

To use a drain hose attachment, you need to locate the designated drainage port on the dehumidifier and connect one end of the hose to it. 

The other end of the hose can then be directed to a floor drain, sink, or any other appropriate drainage location.

By utilizing a drain hose attachment, you can ensure a hassle-free and low-maintenance operation of the solar dehumidifier. 

The collected water will flow directly through the hose and into the drain, eliminating the need for constant monitoring and emptying of the water tank. 

This feature is particularly beneficial in situations where the dehumidifier is operating continuously or in high-humidity areas where the water tank may fill up quickly.

Drain hose attachments also provide flexibility in terms of drainage location. 

You can choose the most convenient and suitable drain point based on the layout of your space. 

This can be especially useful if you plan to use the dehumidifier in a basement, crawl space, or other areas where accessing the water tank for manual emptying might be challenging.

But you should ensure that the drainage location can handle the volume of water being discharged by the dehumidifier. 

Additionally, you should regularly inspect the hose for any obstructions or kinks to maintain smooth water flow and prevent any potential issues.


Can a Dehumidifier Be Run on Solar Power?

A dehumidifier can be run on solar power. Solar dehumidifiers use solar panels to generate electricity, which powers the device to remove moisture from the air.

What Is the Most Energy Efficient Way to Run a Dehumidifier?

The most energy-efficient way to run a dehumidifier is to use a solar-powered model, as it relies on renewable solar energy to operate, reducing energy consumption and costs.

What Is the Best Dehumidifier Method?

The best dehumidifier method depends on your specific needs and preferences. 

Desiccant dehumidifiers use a moisture-absorbing material, while refrigerant dehumidifiers use a cooling element to condense moisture from the air. 

Both methods can be effective, but desiccant dehumidifiers often work better in colder temperatures.

Is a Portable Dehumidifier Worth It?

A portable dehumidifier is worth it if you need a flexible solution for controlling humidity in multiple rooms or locations. 

They are easy to move, compact, and often more affordable than whole-house systems.


As promised, we’ve covered the ins and outs of solar dehumidifiers in this article, discussing their functionality, installation process, advantages, and disadvantages. 

We’ve also highlighted the essential factors to consider before making a purchase. 

And if you ask me, I’d recommend you turn all your home appliances solar-powered for more sustainable and efficient living

I hope this article was helpful and if you still have any questions, feel free to leave a comment below.

Kami Turky
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