Solair World

Should I Leave The Solar Pool Cover On?

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A solar pool cover is a valuable accessory for any swimming pool owner, especially those concerned about energy efficiency and extending their swimming season.

Thе covеr is dеsignеd to absorb sunlight and transform it into hеat, warming thе watеr in thе pool.

This can significantly rеducе thе nееd for an еxtеrnal hеating systеm, saving еnеrgy and lowеring utility bills.

By creating a physical barrier on the surface of the pool, the solar cover minimizes water evaporation.

In dry and/or windy conditions, the evaporation rate of the pool increases, leading to water loss and potential temperature decrease.

Therefore, in these circumstances, leaving a solar pool cover on during daylight hours would be advisable.

On the other hand, in warm and humid conditions, the evaporation rate decreases.

Sincе еvaporation is a natural cooling mеchanism for thе watеr, thеsе conditions might causе thе pool to bеcomе еxcеssivеly warm, еspеcially if thе covеr is lеft on.

In this case, leaving the cover off during the daytime may be more beneficial, allowing some of the heat to escape and maintaining a comfortable water temperature.

Benefits Of Leaving The Solar Pool Cover On

Heat Retention

Solar pool covers are designed to capture and retain heat from the sun.

This helps in maintaining the water temperature at a comfortable level, thereby reducing the need for additional heating and saving energy costs.

Water Evaporation Reduction

By covering the surface of the pool, the solar cover minimizes water evaporation.

This can conserve significant water, especially in hot and dry climates.

Chemical Conservation

Reduced evaporation means fewer chemicals are needed to maintain the pool’s water balance.

Chlorine and other chemicals will remain effective for a longer period, resulting in cost savings and reducing the environmental impact associated with their use.

Debris Prevention

A cover can prevent leaves, insects, and other debris from falling into the pool.

This makes maintenance easier and less time-consuming and helps keep the pool’s filtration system in good working condition.


While not a substitute for proper fencing or other safety measures, a cover can provide protection against accidental falls into the pool, particularly for small animals.

Energy Savings

By reducing the need for heating and chemicals, a solar pool cover helps reduce energy consumption.

This can translate to financial savings and a smaller carbon footprint.

Extended Swimming Season

By retaining the heat in the water, you can extend the swimming season, allowing you to enjoy the pool for a longer period.

Enhanced Efficiency Of Solar Heaters

The cover can work in synergy if you use a solar heater for your pool.

By retaining the heat, it makes the heater’s job easier and more effective.

Aesthetic Appeal

Some pool owners appreciate the neat appearance of a covered pool, particularly when it is not in use.

Algae Growth Prevention

By blocking sunlight, the cover can inhibit algae growth, reducing the need for algae-killing chemicals and frequent cleaning.

Drawbacks Of Leaving The Solar Pool Cover On

Limited Aeration

Leaving the cover on may reduce the oxygen flow to the water, which could affect water quality and clarity.

Potential Algae Growth

Although a cover can reduce algae growth by blocking sunlight, if the pool is not properly balanced, leaving the cover on for too long may create an environment where certain algae thrive.

Heat Overload

In very hot weather, a solar cover might cause the water to become too warm, making it uncomfortable for swimming.

Wear And Tear

Constant use of the cover may lead to wear and tear, reducing its effectiveness over time.

Aesthetic Concerns

Some people may find the appearance of a covered pool unattractive, particularly if the cover becomes dirty or worn.

Chemical Imbalance

An improperly used or ill-fitting cover might lead to stagnation and imbalances in the pool’s chemistry, leading to issues like cloudy water or unpleasant odors.

What Is The Main Purpose Of A Solar Pool Cover?

A solar pool cover retains heat, reduces evaporation, and keeps debris out of the pool.

By trapping the sun’s rays, it helps in heating the water.

While it’s beneficial to keep the cover on when the pool is not in use, especially overnight, it should be removed during swimming.

Leaving it on continuously might lead to over-heating during hot days or hinder proper water circulation.

Balancing the on and off time ensures maximum efficiency.

Can Leaving The Solar Pool Cover On Damage The Pool Or The Cover Itself?

Leaving the solar pool cover on for extended periods without supervision can potentially cause damage to both the cover and the pool.

Overexposure to the sun may degrade the cover material, reducing its lifespan.

Also, if the cover is left on during extremely hot weather, the water might overheat, leading to problems with algae growth or even damage to the pool’s liner.

Regular inspection and maintenance can mitigate these issues.

Will Leaving The Solar Pool Cover On Save On Maintenance Costs?

Yes, keeping the solar pool cover on when the pool is not in use can save on maintenance costs.

It minimizes water evaporation, thus conserving water and the chemicals used to treat it.

By keeping out debris, it also reduces the need for regular cleaning.

However, the cover will need proper care and maintenance to ensure its effectiveness and longevity.

Is It Safe To Leave A Solar Pool Cover On When Pets Or Children Are Around?

While a solar pool cover may deter accidental entry, it’s not designed as a safety barrier for children or pets.

Its primary function is thermal retention and debris prevention.

If safety is a concern, it would be best to invest in a proper safety cover or fence that meets the required safety standards.

How Does Solar Pool Cover Affect The Chemical Balance Of The Pool?

A solar pool cover can affect the pool’s chemical balance by reducing evaporation and thus the loss of chemicals.

This can make maintaining the correct chemical balance easier and more cost-effective.

However, leaving it on constantly might cause localized chemical imbalances, leading to issues like algae growth.

Monitoring the water chemistry and adjusting the cover usage will help maintain a healthy pool environment.