The Truth About Solar Pool Covers: Do They Really Work?

Greetings, fellow gardeners! As summertime approaches, our thoughts turn to lush green lawns, vibrant flower beds, and, for many, sparkling swimming pools. I don’t know about you, but one of my favorite parts of summer is taking a refreshing dip in my swimming pool after a long day tending the garden.

As pool owners know, maintaining that perfect pool environment requires care and attention. From cleaning to chemical balances, a lot goes into keeping a pool operational. One aspect many pool owners ponder is how to keep their pool warm while minimizing energy costs. That’s where solar pool covers come in – but do they work?

In this post, we’ll dive deep into solar pool covers to understand how they function and gauge their effectiveness. I’ll share tips from my decades of gardening experience to help you decide if a solar cover suits your pool. So grab your sun hat, and let’s get growing!

Understanding Solar Pool Covers

For those unfamiliar, a solar pool cover is designed to harness the sun’s warmth to heat your pool water. Essentially, it acts like a blanket for your pool, absorbing and retaining heat from the sun’s rays.

Swimming Pool Solar Cover

Materials Used in Solar Pool Covers

Solar pool covers come in a few different materials:

  • Vinyl – Durable but heavy, doesn’t allow as much sunlight passage
  • Polyethylene – Lightweight and flexible, a trendy option
  • Polypropylene – Similar to polyethylene but slightly less durable

These materials are UV-stabilized and often constructed using a two-layer method with a flat surface on top and a bubble layer underneath, which are heat-fused.

The thickness of the cover also plays a role. Most solar covers range from 8mm to 16mm thick. Thicker covers retain more heat but are pricier and can be heavy to maneuver.

Solar Covers vs. Traditional Pool Covers

While regular covers simply form a protective barrier over the pool, solar covers have special features to heat the water:

  • Absorb and retain heat from sunlight due to the material used
  • Bubble shape acts as mini magnifying glasses to concentrate sunlight

Additionally, solar covers float on the surface, allowing sunlight to reach the water. This is unlike rigid safety covers that sit atop the pool.

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However, solar covers don’t provide the same protective benefits as automatic safety covers when preventing accidental falls into the pool.

How Solar Pool Covers Work

Solar covers transfer the sun’s warmth to your pool through the tiny air bubbles that give the covers their signature look.

Bubble Pool Blanket

The bubbles act as mini insulators that trap heat from the sun’s rays before it can escape to the atmosphere. This heat is then conducted into the pool water, effectively heating the pool.

Solar covers also drastically reduce evaporation, a significant contributor to heat loss. This retaining of heat enables the cover to keep the pool warm at night and on cloudy days when the sun isn’t shining.

Clear solar covers allow the most heat transfer since sunlight can freely pass through. Darker colors absorb more heat initially but also limit sunlight passage.

Heat Retention and Temperature Regulation

Now that we understand the basics of solar pool covers let’s look at how well they work for retaining heat and regulating water temperature.

Efficiency of Solar Pool Covers

The effectiveness of solar covers depends on the following:

  • Direct sunlight exposure
  • Color of cover
  • Bubble shape

On average, a fully covered pool can increase by 10-15°F on a sunny day after about 6 hours. By preventing evaporation, solar covers can reduce a staggering 70% of heat loss.

When To Use A Solar Pool Cover

Quantifying Temperature Regulation Benefits

Studies confirm the excellent heat retention provided by solar covers:

  • Up to 95% reduction in heat loss and evaporation (Cal Poly)
  • 94.9% effective at heating pool water and cutting energy costs (California Polytechnic State University study)
  • 30-70% savings on energy costs by reducing electricity/gas usage (multiple case studies)

The energy savings make sense when considering how much it costs to heat a pool conventionally. By harnessing the free power of the sun, you can slash these expenses.

While solar covers are not a magic bullet, the evidence clearly shows they provide significant temperature regulation compared to an uncovered pool. But as in gardening, results depend on various environmental factors.

Reducing Evaporation and Water Loss

In addition to trapping heat, solar covers play a significant role in water conservation by minimizing evaporation.

Blue Pool Cover

Implications of Reduced Evaporation

Limiting water evaporation provides two key benefits:

Water Conservation

  • California Polytechnic State University study found solar covers can reduce 95% of water loss from evaporation in California pools, conserving over 55,000 acre-feet yearly – enough for a city of 500,000 people!
  • Overall, studies show covers reduce 70-95% of evaporation compared to uncovered pools.

Chemical Balance

  • Evaporation leaves behind chemicals like chlorine, increasing their concentration in the pool.
  • By curbing evaporation, covers promote chemical balance.

Studies on Evaporation Reduction

The effectiveness of solar covers in reducing evaporation has been proven:

  • 94.9% evaporation reduction (California Polytechnic State University)
  • Up to 95% evaporation reduction (multiple studies)
  • 70-95% savings from physical evaporation barriers like floating covers (evaporation reduction study)

The numbers speak for themselves – solar covers are excellent for minimizing water loss through evaporation, providing environmental and cost benefits.

What is the Best Type Of Solar Pool Cover?

Impact on Pool Chemicals and Maintenance

While requiring some maintenance themselves, solar covers can reduce the amount of chemicals needed to maintain your pool.

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Reduced Chemical Usage

Solar covers help chemicals remain effective longer by:

  • Preventing direct sunlight from rapidly dissipating chlorine levels
  • Promoting a stable water temperature and reducing evaporation, allowing chemicals to stay in balance longer

This leads to using fewer chemicals like chlorine over a swimming season.

Cost Savings and Environmental Benefits

The reduction in chemical usage provides dual benefits:

Cost Savings

  • Chlorine decomposes faster when exposed to UV rays, so limiting sunlight can cut chlorine demand.
  • Spending less on chemicals improves the bottom line.
pool energy efficiency

Environmental Benefits

  • Excessive chlorine escaping into the air can release greenhouse gases like chloroform.
  • Using fewer chemicals is better for the environment.

Drawbacks and Considerations

A few drawbacks to weigh:

  • Solar covers allow more debris into pools than solid covers – increased cleaning may be needed.
  • Don’t offer the precise temperature control of a pool heater – some chemical fluctuation still occurs.

Overall, though, the pros of solar covers for pool chemicals outweigh the cons.

Longevity and Durability of Solar Pool Covers

While solar covers are relatively inexpensive, their lifespan leaves something to be desired. Proper care is critical to maximizing their usefulness.

Longevity and Durability of Solar Pool Covers

Durability Over Time

Pool cover longevity varies:

  • Cheaper models may last just one season.
  • Higher quality brands typically last 3-7 years.
  • Warranties often provide little value beyond the first year.

Proper Care and Maintenance

Here are tips to extend the life of your solar cover:

Regular cleaning – Gently scrub away debris, mineral deposits, and algae that can degrade the material. Let dry thoroughly before storing.

Maintain proper chemical balance – Chlorine over three ppm can rapidly degrade covers. Remove when shocking the pool.

Careful storage – Avoid direct sunlight; store under a cover when unused. Don’t leave sitting on the ground.

Winterize – Remove solar cover for winter, clean, allow to dry, and store safely away for next season.

Warranty and Replacement

  • Warranty coverage ranges from none up to 7 years.
  • Many warranties only cover certain types of defects like seam failure.
  • To make a claim, often just a small section of cover needs to be returned.
Cost Benefit Analysis of Solar Pool Covers

Do your homework to understand the warranty coverage before purchasing a solar cover. While price and convenience may be appealing, it could cost you more in the long run if the cover only lasts one season.

Cost-Benefit Analysis of Solar Pool Covers

Solar covers provide free solar warmth in exchange for a small upfront investment. But how do they pencil out cost-wise in the long run?

Initial Costs

  • Basic solar cover – $30 to $150
  • Cover with reel system – $600 to $1,500 installed
  • Far less than $1,500 to $20,000+ for customized rigid pool covers

Long-Term Savings

Studies show solar covers provide substantial energy savings:

  • 30-70% reduction in energy costs (multiple studies)
  • Savings from lower water usage as well since less water must be added to replace evaporated water.

Comparative Analysis

Unlike solar heating systems, which can take 1-2 years to recoup costs, solar covers often provide immediate savings as early as the first season of use.

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Return on Investment

The payback period depends on the following:

  • Initial cover cost
  • Frequency of pool use
  • Local climate conditions

But solar covers can realize a total return on investment in the first season through energy and water savings.

For most pool owners, solar covers are an economic no-brainer when maintaining a comfortable pool temperature without breaking the bank.

solar covers are an economic no brainer

User Experiences and Case Studies

Beyond the stats and figures, what are people saying about using solar pool covers?

Real-World Examples

Solar covers receive positive feedback from users:

  • “My DIY bubble wrap cover worked to keep my pool warmer overnight.”
  • “This solar cover warmed my above-ground pool nicely during the day and retained heat well at night.”

Common Complaints

Some drawbacks mentioned:

  • Bubble degradation over time due to sun exposure and chemicals.
  • Handling large covers can be difficult and time-consuming.
  • Ongoing cleaning and maintenance are required.

Expert Opinions

Industry experts endorse solar covers for their benefits:

  • Up to 60% reduction in chlorine use (Florida Solar Energy Center study)
  • Recommended as an energy-efficient pool heating option (NBC News segment)

Overall, users and experts praise solar covers and acknowledge some functionality considerations. Researching to select a durable, high-quality cover improves satisfaction.

Ongoing pool cleaning and maintenance

Alternatives and Complementary Solutions

While solar covers are the most popular solution, other options exist for heating your pool naturally.

Alternative Solutions

Liquid Solar Covers

  • Form an invisible layer on the pool surface to retain heat.
  • Reduce evaporation up to 40%, but don’t prevent debris.

Solar Rings/Squares

  • Smaller sectioned covers are easier to install than full-size covers.

Solar Pool Heating Systems

  • Use solar panels to harness sunlight into pool heating.

Complementary Products


  • Reduce evaporation, enhancing solar cover effectiveness.

Energy-Efficient Pool Technologies

  • Combining covers with solar heating systems maximizes energy savings from the sun.

Explore all the options to find the best solar heating solution for your pool setup!

After reviewing solar pool covers in-depth, they provide an effective, eco-friendly way to slash pool heating costs and conserve water in your backyard oasis.

solar cover experiences and adventures

The evidence demonstrates solar covers can raise and maintain pool temperatures while reducing evaporation, but local conditions also impact overall performance. With proper care and maintenance, a solar blanket can provide many seasons of benefits.

This deep dive has equipped you with the knowledge to decide if a solar pool cover suits your pool. Get out there and start harnessing the free solar power above us to take your pool environment to the next level while saving money and resources.

As always, I’d love to hear about your solar cover experiences and adventures in your backyard paradises. The wonders of nature and green spaces never cease to inspire me. Happy gardening, friends!