A solar pool cover does two jobs, and confusing them is why so many owners end up with the wrong one. Heat gain is what happens in direct sun when a film passes solar energy into the water. Heat retention is what happens overnight when the trapped air layer slows evaporation. A cover can be excellent at one and mediocre at the other, and the right balance depends on your climate, your pool chemistry, and whether you already run a heater.
That distinction sets up this roundup. We pulled the specifications, warranty terms and review patterns for eight of the highest-reviewed bubble blankets on the market, then sorted them against the two questions that actually decide your purchase: how many degrees does the cover add, and how much heat does it hold onto after dark. We did not run first-party temperature trials on our own pools. Every number below comes either from the manufacturer listings or from named third-party tests, and we say which is which.
If you want a broader look at off-grid power gear for the same reason you want a cover on your pool, we separately tested 12 solar power banks. For pool heat, the short version is this: the Intex 28014E leads on proof, the Sun2Solar 1200 Series leads on overnight retention, and the VEVOR rectangle leads on build quality per pound of film.
Table of Contents
Top 3 Solar Pool Covers for Heat Retention in October 2026
Intex 16-Ft Round Solar Cover
- Floating bubble film
- Reduces evaporation 95%
- One-person handling
- 16 ft round size
Sun2Solar Blue 12 Mil Round
- 12 mil thickness
- About 5 degree overnight drop
- Extra overlap for ladders
- 1200 Series resin film
VEVOR 24 x 12 Ft 12 Mil
- 12 mil polyethylene
- Single center seam
- Cuts to any pool shape
- Cut to 95% evaporation loss
All 8 Best Solar Pool Covers Compared Side by Side in 2026
| Product | Specifications | Action |
|---|---|---|
| Intex 28014E 16-Ft Round Solar Cover |
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| Sun2Solar Blue 24-Ft Round 12 Mil Cover |
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 Blue Wave 16×32 12 Mil Blue Blanket |
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| VEVOR 24 x 12 Ft 12 Mil Rectangle |
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 In The Swim 18-Ft Round 8 Mil Cover |
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 VINGLI 16×32 12 Mil Rectangle |
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 BigXwell 20×40 16 Mil Blue Cover |
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 BigXwell 18-Ft Round 12 Mil Cover |
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Check Latest Price |
1. Intex 28014E Solar Cover – Best Proven Pick for 16-Ft Round Pools
INTEX 28014E Solar Pool Cover: for 16ft Round Easy Set and Metal Frame Pools – Insulates Pool Water – Reduces Water Evaporation – Keeps Debris Out – Reduces Chemical Consumption
Color: Blue
Material: Plastic
Floating install
Size: 16 ft round
Weight: 16 ounces
Pros
- Light enough for one person to place and remove
- Real heat gain reported on sunny days
- Keeps leaves and debris off the surface
- Reduces evaporation and chemical use
Cons
- Thin brittle film that often lasts about one season
- Bubbles peel and shed plastic discs into the water
- Not a safety cover and can blow off in wind
The Intex 28014E is the pick to beat because its review record is the deepest in this roundup by a wide margin. Owners consistently describe the same outcome: they float it on in the morning, the water warms over the day, and they pull it off at night with one hand. For a 16-foot round above-ground pool, that is the whole job described in one sentence.
The film is blue and lists at 16 ounces across a 192 by 192 inch footprint. It is a floating design with a drawstring closure, meaning there is no frame, no hardware and no drilling. The manufacturer states the cover reduces water evaporation by 95 percent, and owners back the debris-blocking side of that claim more consistently than the heat number.
Durability is the honest weakness. A large share of reviews describe bubbles that peel away over a season or two, along with blue plastic discs that shed into the water and end up in the filter or skimmer. The film is also thin enough that a stray tool or a sharp pool edge will puncture it, so handling care matters more here than with any heavier cover in this list.
There is no manufacturer warranty listed on this model, which is the other side of the same coin. You are buying a season-to-season consumable that happens to be cheap enough to replace without thinking about it, rather than a fixture designed to last five years.
What you should know before buying this cover
If your pool is exactly 16 feet round with an Easy Set or metal frame, this fits out of the box with no trimming. If your pool is any other shape or size, the cut-to-fit approach still works, but you are now cutting film rather than dropping it onto a correctly sized pool, and the seam-free round shape is the main thing you give up.
Because the film is thin and non-stretch, plan to buy a second one eventually. Owners who treated it as a two-season item were far happier than those who expected a permanent installation, and the ones who racked it on a reel reported far less damage than the ones who folded it on the lawn.
Where this cover falls short
Shed bubbles are a genuine nuisance in a sand or cartridge filter setup. If your pool sits under trees and you plan to run the cover for days at a time, plan on checking the skimmer basket often, because the film is not designed to biodegrade quietly into the water.
It also does nothing for wind. This is a light film with no anchoring system, so it needs to come off before a storm rather than being tied down. Treat it as a daily-use comfort tool, not a weather barrier.
2. Sun2Solar Blue 24-Ft Round 12 Mil Cover – Most Versatile for Overnight Retention
Sun2Solar Blue 24 ft Round Pool Solar Cover | 12 Mil | Heat Retaining
Color: Blue
Material: Resin
Floating install
Size: 24 ft round
12 mil film
Pros
- About a 5 degree overnight drop in owner reports
- Extra overlap fits around ladders and posts
- Wide range of round sizes available
- Blocks leaves and cuts evaporation
Cons
- Bulky and heavy when soaked
- Some seams split and bubbles break down early
- Surface circulation drops while fully in place
The Sun2Solar 1200 Series is the best solar blanket for heating a pool when your priority is what happens after sunset. Across reviews of this 12-mil blue round cover, owners repeatedly report holding overnight temperatures to roughly a 5 degree drop, which is the single most useful retention figure in this roundup.
It is resin film in a blue solid pattern with a pull-on floating installation and extra overlap around the edges. That overlap is not cosmetic. It is what lets the cover sit around ladder rails, posts and other protrusions without forcing you to cut a hole in the middle of the sheet, and owners with older in-ground decks call it the reason they stopped trimming.
The manufacturer states the cover can raise water temperature by up to 15 degrees and reduces evaporation by up to 95 percent. Treat the 15 degree figure as a best-case marketing number in full summer sun; the overnight retention reports are the more repeatable claim in the review data.
The recurring complaint is lifespan. Owners report early bubble breakdown and seam deterioration, with a typical service life landing somewhere around two seasons for the units that fail. Sun2Solar’s customer service is frequently praised for issuing replacements, which softens that hit considerably compared with brands that leave buyers to sort it out alone.
What you should know before buying this cover
Choose this one if you are chasing overnight retention rather than peak daytime gain. A blue 12-mil film is a middle ground: it blocks more UV than a clear cover while still passing enough energy through to warm the water during the day.
Size it to the pool and trim the overlap only if you have to. The film is sold in many round dimensions, so there is rarely a reason to size up and trim, and sizing up is the fastest way to end up with a loose sheet that shifts in the wind.
Where this cover falls short
Wet, this is a heavy object. On a 24-foot round pool, removing it is a two-person job for most people, and reviewers consistently describe it as bulky to store once it is off the water. If handling weight is your main barrier, this is not the cover to convince yourself you can manage alone.
Surface circulation also drops while it is fully in place. For a pool in a climate where you might leave it on for days, that is a real consideration, and it is why this cover works best on a day-on, night-off schedule rather than as a permanent lid.
3. Blue Wave 16×32 12 Mil Blue Blanket – Best for In-Ground Rectangles
Blue Wave 16×32-ft Rectangle Solar Pool Cover 12-Mil Blue – Solar Cover for Above Ground Pool & Inground Pool, Thermal Bubble Blanket for Heat Retention & Reduced Evaporation
Color: Blue
Material: Plastic
Size: 32 by 16 ft
Area: 512 sq ft
Weight: 27 pounds
Pros
- Raises water temperature measurably
- Cuts evaporation sharply in dry climates
- Trims easily for irregular and kidney shapes
- Blocks leaves insects and critters
Cons
- Shed bubbles can clog filters and skimmers
- Thin material with weak seams
- Five-year warranty is prorated and costly to use
For a rectangular in-ground pool, the Blue Wave NS420 is the most purpose-built option in this roundup at 512 square feet of 12-mil blue film. Owners running in-ground rectangular pools say it measurably raises water temperature and keeps pools noticeably warmer on cool nights, which is the retention result you are actually buying.
The thermal bubble construction uses downward-facing air pockets to move solar heat into the water while holding warmth after dark, and the blue finish is designed specifically for that overnight side of the trade-off. It works on in-ground and above-ground pools alike, and it folds for storage.
Where it struggles is build quality. Reviews describe the material as thin, closer to ordinary bubble wrap than a heavy blanket, and the seams are the first thing to go. At 27 pounds across 512 square feet, this is not the cover you buy when durability over multiple seasons is the deciding factor.
The warranty needs careful reading too. It is listed as a 5 year limited manufacturer warranty, but reviews describe it as prorated in a way that leaves buyers paying much of the cost plus shipping on a replacement. Treat the warranty as partial coverage, not a five-year guarantee.
What you should know before buying this cover
Buy this one for an in-ground rectangular pool in a climate where evaporation is the main loss, such as a dry or windy region. The blue 12-mil film and the large rectangular footprint work together here, and trimming is straightforward for anyone with a kidney-shaped or freeform basin.
Check your filter type before you buy. Bubbles do shed on this model, and that combination matters most on cartridge and sand filters where debris ends up inside the media rather than in a skimmer basket.
Where this cover falls short
Owners report that in full sun the water can become uncomfortably hot under this cover, which means it needs to come off during peak summer afternoons rather than staying on all day. That is a feature if you want a hot pool and a problem if you are trying to keep it swimmable.
The weak seams also mean this cover is a poor match for pools where the film gets walked on frequently or where kids and pets get into the water often. Walking on the bubbles pops them, and popped bubbles do not recover.
4. VEVOR 24 x 12 Ft 12 Mil Rectangle – Best Value for Heat and Build Quality
VEVOR Solar Pool Cover, 24 x 12 ft Rectangle Solar Cover 12 mil for Pools, Inground Above Ground Swimming Pool Solar Blanket with Bubble, Heat Retaining Solar Covers Blue
Color: Blue
Material: Polyethylene
Size: 24 by 12 ft rectangle
Thickness: 12 mil
Pros
- Sturdy PE that feels heavier than most covers
- Only a single center seam on large sizes
- Several extra degrees of retained warmth
- Cuts easily and rolls onto a reel
Cons
- Heavier than typical and can strain light reels
- Can pull a small tear when drawn off a reel
- Needs trimming plus slits for ladder legs
The VEVOR 24 by 12 rectangle is the best value pick because reviewers with long cover-buying histories rate its material above what they have used from brands costing considerably more. The film is 12 mil polyethylene, and it is noticeably thicker-feeling in the hand than most covers at this tier.
The structural detail that stands out is seam count. On larger sizes this model uses a single center seam rather than a grid of them, which removes the usual failure points. Seam failure is the top durability complaint across this entire roundup, so a design that minimizes seams is solving a real problem rather than adding a feature.
The heat results in reviews line up with the physics. Owners report several extra degrees of warmth and retained heat overnight, and the manufacturer states the cover raises water temperature by 8 to 15 degrees Celsius depending on conditions while cutting evaporation by up to 95 percent. Those are manufacturer claims, so read them as a ceiling rather than a promise.
Cut-to-fit is fully supported. The film cuts easily with scissors, blocks pollen and leaves, and rolls smoothly onto a cover reel for storage, which makes it one of the easier options to keep out of the way between uses.
What you should know before buying this cover
Size this for a rectangular pool roughly in the 24 by 12 foot class and trim to fit. The care instructions call for cleaning with warm water and mild soap, air drying, then folding or rolling for storage away from direct sunlight, which is the same routine that keeps any bubble cover alive.
If you plan to use a reel, buy a reel rated for the weight. Owners with light-duty reels report the heavier film straining the mechanism and occasionally pulling a small tear when drawn back off.
Where this cover falls short
It runs heavier than a typical 12 mil cover, and that weight is the whole trade-off against lighter models in this list. On a large pool, expect to want two people or a reel to move it comfortably.
Owners also report the water can overheat in peak summer, requiring removal to cool. If your pool is in a hot region and you plan to leave the cover on for full days, factor in an afternoon removal or a lighter film.
5. In The Swim 18-Ft Round 8 Mil Cover – Lightest Handling Option
In The Swim 18′ Standard Blue Round Solar Pool Cover 8 Mil
Color: Blue
Material: Polyethylene
Size: 18 ft round
Weight: 13 pounds
8 mil film
Pros
- Solar bubbles warm water and hold heat overnight
- Lightweight enough for one person to handle
- Reduces evaporation and chemical consumption
- Trims for ladders steps and odd shapes
Cons
- 8 mil is thinner than premium options
- Must come off when shocking the pool
- Chemistry care instructions must be followed
The In The Swim 8MIL 18RND is the answer when handling weight is what is stopping you from buying a cover at all. At 13 pounds and 8 mil polyethylene, it is the lightest real bubble blanket in this roundup, and owners describe it as easy to trim, easy to lift, and easy to fold away.
It is listed with a 3 year manufacturer warranty, which is unusual at this thickness and better than the no-warranty option at the top of this list. The heat performance lands where you would expect for 8 mil: it warms the water during the day and holds warmth overnight, just with less margin for error.
The important thing to read is the care instruction, because it is stricter than most. The manufacturer directs you to place the cover only when chlorine is below 2.5 ppm and pH is above 7.2, and to put it away when shocking the pool. Skipping that step is how 8 mil film gets degraded early.
Beyond chemistry, it does the standard job well. Evaporation drops, chemical use drops, and the cut-to-fit design handles ladders, steps and unusual pool shapes without a lot of fuss.
What you should know before buying this cover
Choose this cover for an above-ground round pool where one person has to do all the work. It is the option that survives daily use by a single owner, and forum discussion consistently points to handling as the number one blocker for larger pools.
Expect shorter service life than a 12 or 16 mil film. It is a reasonable trade for a pool you will use every day, and a poor trade for one you will cover once a week.
Where this cover falls short
Eight mil is thin. Reviews note it may not last as long as premium options, and it is the least durable film among the eight products here. If your priority is heat retention above all else, the extra weight of a thicker blanket buys you measurable overnight improvement.
The chemistry requirements are also a genuine constraint. If you shock your pool regularly or run a sanitizer system that spikes above the listed level, you will be pulling this cover off more often than you planned, which erodes the convenience that made it attractive.
6. VINGLI 16×32 12 Mil Rectangle – Best Welded-Seam Construction
VINGLI 16x32ft Solar Pool Cover 12mil Rectangle Blue
Color: Blue
Material: Polyethylene
Size: 32 by 16 ft rectangle
Thickness: 12 mil
Pros
- Heavy-duty 12 mil with strong welded seams
- Blue bubbles absorb daytime heat and release it
- Simple floating installation
- Trims with scissors to any shape
Cons
- Bubbles can look deflated before sun exposure
- Bubble side must face down to work
- Clear variants hold less heat overnight
The VINGLI 16 by 32 rectangle carries a 4.4 rating on 808 reviews, the highest average rating among the rectangular covers here. What buyers single out is the welded seam construction at 12-mil thickness, which directly addresses the seam failure that dominates complaints about other blankets.
The heat mechanism is straightforward. Thousands of transparent blue bubbles absorb sunlight through the day and release that energy into the water, while the same film slows evaporation at night. Owners rate the combination highly for both daytime warming and retained warmth.
Installation is about as simple as it gets. You float it on the surface, trim it to shape with scissors if your pool is irregular, and pair it with a cover reel if you want faster on and off cycles. Owners report working well with a reel for routine use.
One setup note trips people up: the bubble side has to face down. Owners who installed it inverted report poor results, and that orientation problem is the most common fixable error in the reviews for this model.
What you should know before buying this cover
This is the pick if your pool is a rectangular in-ground or above-ground and you want a welded build without moving up to 16 mil. It sits in the middle of the thickness range where retention performance and handling weight balance out.
Size it generously and trim, since the film is designed for it. Reviews on this model specifically recommend sizing up a little and cutting down, which is the opposite of the advice given for round molded-size covers where a close fit is better.
Where this cover falls short
Bubbles can look partly deflated before the cover has been in the sun, which owners attribute to thermal expansion and contraction. It is a cosmetic issue rather than a functional one, but it does look alarming the first time you unroll it on a cool morning.
Also note that VINGLI sells clear variants of the same shape, and buyers report those retain less heat overnight than the blue version. If heat retention is your reason for buying, stick with blue.
7. BigXwell 20×40 16 Mil Cover – Best Heavy-Duty 16 Mil Upgrade
BigXwell Heavy-Duty Solar Pool Cover 20x40ft – 16Mil Blue
Color: Blue
Material: Polyethylene
Size: 40 by 20 ft rectangle
Weight: 8.57 kg
Thickness: 16 mil
Pros
- 16 mil is the thickest film in this roundup
- About a 5 degree overnight loss in mild winter
- Easy to cut without tearing or fraying
- Rolls smoothly onto a cover reel
Cons
- Larger sizes need two people to move it
- Very stiff film that cuts slowly with help
- Best performance needs a roller or reel
The BigXwell 20 by 40 is the 16 mil upgrade, and at 8.57 kg across 480 by 240 inches it is the heaviest and thickest blanket here. Reviewers with long replacement histories rate it as the thickest and most durable they have used, which is exactly what you are paying for at this end of the range.
The retention figure is the standout. Owners in mild winter conditions report losing only about 5 degrees overnight with this cover on. That is a concrete, condition-specific number, which makes it far more useful than a bare percentage claim.
Construction details hold up under cutting. It trims cleanly with scissors without tearing or fraying, rolls smoothly onto a cover reel, and works well for hot tubs and spas as well as full-size pools. Repeat purchases across seasons suggest owners are sticking with it once they have bought it.
Beyond heat, the thermal insulation helps reduce both water and chemical evaporation, and the film keeps dust, leaves, debris and animals out of the pool while it is on.
What you should know before buying this cover
Budget for a reel or roller at this size. Owners are clear that the best results on a large pool come with mechanical assistance, and that without one you are looking at a two-person lift every single time.
Cut slowly and get help. The film is very stiff, and owners who rushed the trim reported fraying at the cut line. The material rewards a little patience on installation day.
Where this cover falls short
Weight and stiffness are the honest costs. This is not a cover you will casually pull off after a swim, and if your pool is small enough that 16 mil is overkill, the handling burden will outweigh the retention benefit.
At 40 by 20 feet, it also serves a very specific pool. If your pool is closer to 16 by 32, step down a thickness tier rather than trimming a large sheet down to size, because a lot of excess film is a lot of extra material to store and to catch wind.
8. BigXwell 18-Ft Round 12 Mil Cover – Best Midweight Round Option
BigXwell Solar Pool Cover, 12Mil Round 18 Foot Solar Blanket for Above-Ground and In-Ground Pools, Swimming Pool, Blue 1200Series (Round 18 FT)
Color: Blue
Material: Polyethylene
Size: 18 ft round
Thickness: 12 mil
Floating design
Pros
- 12 mil bubbles hold warmth on cloudy days
- Cuts water and chemical evaporation
- Lightweight and easy to install or remove
- Keeps dust leaves and debris out
Cons
- Thinner than the 16 mil heavy-duty option
- Smallest review base of the eight picks
The BigXwell 18-foot round is the midweight option if you want 12-mil film in a simple round shape without moving up to 16 mil. It carries a 4.4 rating, and owners describe the thermal bubbles as holding temperature effectively on cloudy days and chilly nights, which is the harder retention test.
The brand has a strong heavy-duty reputation built on the 16 mil model, so the 12 mil version comes from a manufacturer that clearly knows how to make thick bubble film. It floats into place with no hardware, and owners call it lightweight and easy to install or remove.
The job it does is standard and it does it cleanly. Daytime sun gets trapped in the thermal bubbles, warmth is held into the evening, and water plus chemical evaporation drops along with the amount of debris reaching the water.
Care instructions call for hand washing and storing in a cool, dry place when not in use. Follow that and the film has a reasonable chance of outlasting the single-season options at the lighter end of this list.
What you should know before buying this cover
This suits a round above-ground pool where you want more retention than 8 mil gives you but do not want the handling weight of 16 mil. That middle tier is where most of the useful improvement in overnight retention actually happens.
Judge it on the specification rather than the review count. With 277 reviews, this is the smallest sample in the roundup, so there is less long-term durability feedback available than for the models above it.
Where this cover falls short
It is 12 mil, not 16 mil, so it will not hold heat overnight as well as the heavy-duty model in this list or resist tearing as well in high-wind conditions. If you have a large rectangular in-ground pool, the 16 mil option is the better long-term buy.
The small review base is the other limitation. You have less real-world data to lean on, so if you are nervous about durability, pick a model with a deep review record and a stated warranty instead.
How Much Heat Does a Solar Cover Actually Add?
A clear bubbled solar cover typically raises water temperature by 10 to 15 degrees over roughly six hours of full sun, and holds the water to within about 5 degrees overnight by cutting evaporation by up to 95 percent. The daytime number depends heavily on how much sun the water actually receives.
Bob Vila’s published test measured every cover raising water temperature 4 to 5 degrees in one hour of 2 p.m. sun on days when air temperatures sat between 89 and 92 degrees. Better Homes & Gardens reported a different pattern: one blue cover raised water 8 degrees in a single week, and a separate cover held a pool from 72 degrees up toward 80 degrees across its testing period.
Those three figures are not in conflict. One is an hourly rate in peak sun, one is a weekly accumulation, and one is a multi-week trend on a pool that started cool. The mechanism behind all of them is the same: trapped air bubbles slow evaporation, and losing a quarter inch of water costs roughly 5 degrees.
The Sun2Solar listings claim up to 15 degrees of gain and VEVOR lists 8 to 15 degrees Celsius depending on conditions. Those are manufacturer figures without published methodology, so we present them as ceilings. The independently measured results from Bob Vila and Better Homes & Gardens are the ones we treat as reliable.
Day-On vs Night-Off: When to Leave the Cover On
Leave the cover on during the day if it is clear or light blue and your climate gets real sun. Leave it off during the day if it is opaque, blue or Space Age silver-black and your nights are already warm. Ring and mat products can stay on around the clock. Liquid covers need no action at all.
The confusion here is genuine and shows up repeatedly in owner discussions. One common view is that solar covers retain heat but add none. Another is that they only belong at night because uncovered water takes in more UV. Both are partly right, and the tiebreaker is the color of the film.
A clear film passes UV through to the water, so it accelerates daytime heating while providing weaker overnight insulation. An opaque or silver-black film blocks that UV, so it gives up some daytime gain and wins back more at night. In a cool or cloudy climate, clear wins on total heat gained. In a hot region where nights stay warm, opaque wins because the evaporation loss is small and the daytime gain is worth less.
Forum owners also point out that in warm climates the value of a cover shifts from heat gain to evaporation and chemical reduction, since the pool is already hot enough. That is the same trade-off seen from a different angle, and it is why the day-on rule flips by region.
Thickness Guide: 8 Mil vs 12 Mil vs 16 Mil
Twelve mil is the sweet spot for heat retention and handling. Sixteen mil buys durability and wind resistance. Eight mil is a low-cost choice for above-ground pools only.
8 mil is the lightest and easiest to handle by one person, and owners consistently confirm it warms water during the day. It holds less heat overnight than thicker tiers and wears out faster, so it works best on a smaller above-ground pool that will be covered often.
12 mil is the balance point. This is where most in-ground owners should land, and it is the tier most of this roundup sits in. Swim University independently found 12 mil to 16 mil performed best for heat retention, noting thicker mil absorbed more heat and resisted sun damage, chemicals and tearing better.
16 mil is the durability tier. It resists tearing and handles wind and repeated handling best, and it retains heat about as well as anything you can float on a pool. The cost is weight: 16 mil covers on large pools are consistently a two-person job and really want a reel.
One mil is one-thousandth of an inch, so the step from 12 to 16 mil is a meaningful jump in material, not a rounding difference. It shows up in your hands as soon as you unroll the film.
Color Guide: Clear, Blue, or Silver-Black Space Age
Clear covers are best for daytime heat gain, blue is the middle ground for balanced performance, and silver-black Space Age covers are best for overnight retention and UV protection.
Clear film maximizes solar transmittance, which is why it wins in sunny climates during the day. The cost is that UV reaches the water and degrades chlorine faster, so clear-cover owners lean more heavily on stabilizer.
Blue film, which is what most of this roundup uses, splits the difference. It passes enough energy to warm the water during the day and reflects enough back at night to hold warmth, plus it blocks more UV than a clear sheet.
Space Age covers put a black layer on top and a silver layer underneath. The black absorbs solar energy and adds durability while the silver reflects heat back into the water and blocks UV from attacking pool chemistry. If you retain heat overnight rather than gain it by day, this is the construction to look for.
Blanket vs Solar Rings vs Mats vs Liquid Cover
A bubble blanket cuts evaporation by roughly 95 percent. Solar rings and mats reduce it far less, and liquid covers reduce evaporation only modestly, though they retain a meaningful share of a blanket’s heat performance.
Rings and mats are the answer for owners who refuse to reel a blanket. You never drag a heavy soaked sheet across the deck, but you also give up most of the surface coverage that makes a blanket work.
Liquid covers form an invisible film of aliphatic alcohol on the surface. PoolSupplies notes they are roughly 75 percent as effective as a blanket at retaining heat while cutting evaporation by only about 15 percent, and Shasta Pool Supply cites manufacturer figures of 85 percent evaporation and 70 percent heat loss reduction. The chemical cost each season is the deciding factor for most owners.
How to Install, Remove and Store a Solar Pool Cover
Float the cover on with the bubble side down, trim the excess so it sits inside the pool edge, and cut a notch for the skimmer. That is the whole installation. There is no anchoring and no frame.
You can run the pool pump with a solar cover on. The film floats on the surface and does not impede circulation. The one chemistry caveat is to wait at least an hour after adding chemicals before putting the cover back, and follow the stricter limits some manufacturers publish, such as the chlorine and pH thresholds on the In The Swim model.
For removal without a reel, fold the cover accordion-style in sections of about four feet and carry it off in manageable pieces. A saturated cover is heavier than it looks, and the biggest handling injury risk in this whole category is lifting a full sheet off a large pool alone.
Do not walk on the cover. Owners repeatedly report that stepping on the bubbles pops them, and popped bubbles do not recover, which is why walking damage shortens service life faster than sun damage does.
For storage, clean the film with warm water and mild soap, air dry it flat, then fold or roll it and keep it in a cool, dry place away from direct sunlight. Drying a cover on the lawn burns the grass and can warp the film. Rolling it up and leaving it in the sun degrades it just as fast. If you store it rolled, an outer UV cover is worth adding, which is the reasoning behind the warranty conditions owners cite when comparing long warranties.
Solar Pool Covers Are Not Safety Covers
A solar pool cover cannot hold a person or a pet. It is a thin floating film that collapses under any real weight, and it will not keep anyone from drowning underneath it.
Remove the cover completely before anyone gets into the pool. Not pushed to one side, not partially lifted. A partially removed cover is exactly the condition that causes drowning, because it looks like a barrier while behaving like a trap.
If you need a barrier that holds weight, you need a properly installed safety cover, and that is a different product with a different price and installation standard. Keep the safety cover on the job when it is not in use.
Frequently Asked Questions
What is the best pool cover to retain heat?
A 12 mil blue bubble blanket is the best balance for most pools, and the Sun2Solar 1200 Series round cover is our retention pick because owners report holding water to roughly a 5 degree overnight drop. Step up to 16 mil, such as the BigXwell heavy-duty cover, if durability and wind resistance matter more than handling weight.
Do solar covers really help heat a pool?
Yes, and they do two separate jobs. In sun they pass solar energy into the water, and at night the trapped air layer cuts evaporation by up to 95 percent. Because losing a quarter inch of water costs about 5 degrees, suppressing evaporation is what actually keeps a pool warm overnight.
Should I leave my solar cover on during the day?
It depends on the color. Clear film gains more heat in daylight, so leave it on during the day in a sunny or cool climate. Opaque, blue or silver-black film gains less by day and holds more overnight, so leave it off during the day if your nights are already warm. Rings and mats can stay on around the clock.
How many degrees will a solar cover heat a pool?
Expect 10 to 15 degrees over roughly six hours of full sun from a clear bubbled blanket. Bob Vila measured 4 to 5 degrees in one hour of 2 p.m. sun on 89 to 92 degree days, and Better Homes u0026amp; Gardens measured 8 degrees over a week and a climb from 72 toward 80 degrees across its test period.
What’s the best thickness for a solar pool cover?
12 mil is the sweet spot for heat retention and handling, 16 mil is the durability and wind resistance tier, and 8 mil suits smaller above-ground pools handled by one person. Swim University found 12 mil to 16 mil performed best for heat retention, with thicker film resisting sun damage, chemicals and tearing better.
Which Solar Pool Cover Should You Buy?
The best solar pool covers for heat retention split cleanly by job. Buy the Intex 28014E if you want the deepest proof of performance and one-person handling on a 16-foot round pool. Buy the Sun2Solar 1200 Series if overnight retention is the number you care about. Buy the VEVOR rectangle if you want the most durable film per pound spent, and the BigXwell 16 mil if you have a large rectangular pool and a reel.
Start by measuring your pool and picking your thickness tier, then check the chemistry limits on whichever model you choose. Get the reel at the same time if the cover is anything heavier than 8 mil.