Quick answer: A solar pool cover (bubble cover) is the cheapest, highest-ROI way to cut pool heating costs — the U.S. Department of Energy says covering a pool when it’s not in use is the single most effective way to reduce heating bills, with savings of 50-70%, because evaporation accounts for the largest share of outdoor pool heat loss. Thickness matters more than color: 8-mil covers are lightest and cheapest for small-to-mid pools, 12-mil (Blue Wave, Sun2Solar’s mid-tier) balances durability and price for most above-ground and in-ground pools, and 16-mil (Sun2Solar’s 1600 Series) absorbs the most heat but is noticeably heavier to roll and store. Expect 3-4 years of real-world life regardless of thickness, and pair the cover with a reel if you want it used daily instead of skipped.
Already shopping a heater? A solar cover is the one accessory our best pool heater guide recommends pairing with every type — gas, heat pump, or solar panels — because it keeps the heat you paid to add instead of letting it evaporate overnight.
Solar pool covers at a glance
| Thickness | Best for | Weight/handling | Typical price |
|---|---|---|---|
| 8-mil | Small-to-mid pools, solo handling | Lightest — ~13 lb for an 18-ft round | ~$40-$90 |
| 12-mil | Most above-ground & in-ground pools | Moderate, 2-person recommended over ~20 ft | ~$60-$150 |
| 16-mil | Max heat absorption, harsh/cold climates | Heaviest, hardest to roll solo | ~$100-$300 |
| Reel (manual) | Any size, daily-use convenience | n/a | ~$140-$190 |
| Reel (powered) | Large in-ground pools | n/a | ~$400+ |
1. Sun2Solar 1600 Series (16-mil) — maximum heat absorption
Sun2Solar 1600 Series Solar Pool Cover
- The thickest cover in Sun2Solar's lineup, built for owners who want the strongest heat-absorption and durability tradeoff rather than the lightest cover to handle.
- Fits round above-ground pools from 10 ft up to 33 ft in diameter, per Sun2Solar's own size chart — check your exact pool diameter before ordering, since solar covers run noticeably smaller than their nominal pool-size label to allow for coping overhang.
- Heavier to roll and store than the 8- or 12-mil options — a real tradeoff reviewers consistently flag, so budget for a reel (see below) if you're installing this size solo.
- Sun2Solar's warranty covers manufacturing defects like delamination and seam failure, but is limited — durability reports are mixed, with some owners reporting multi-year use and at least one reported failure within about 1.5 years.
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2. Blue Wave 12-mil — the balanced pick for most pools
Blue Wave 12-Mil Solar Pool Cover
- Sits in the middle of the thickness range — noticeably easier to roll and store than a 16-mil cover while still outlasting an 8-mil cover under normal sun and chemical exposure.
- Available in both round (above-ground) and rectangular (in-ground) sizes, unlike some single-shape budget covers, so it's the pick most owners of either pool type default to.
- Carries a 5-year limited manufacturer warranty on its larger 16x32 ft size per current retailer listings — longer than the bare manufacturing-defect coverage typical of cheaper imports.
- Pairs with the running-cost breakdown on this site: a cover is the one upgrade that lowers the monthly bill on every heater type, not just one.
3. Budget 8-mil cover — lightest, cheapest, solo-friendly
8-Mil Solar Pool Cover (VEVOR and similar budget brands)
- At about 13 lb for an 18-ft round cover, this is the thickness one solo owner can realistically roll on and off without a reel or a second person.
- Absorbs less heat per DOE's general cover-savings principle than a thicker cover, but still delivers the core benefit — cutting overnight evaporation — at the lowest price point in this comparison.
- Pool-forum consensus holds that color (clear vs. blue) matters less than thickness and UV stabilization at this price tier — a well-reviewed 8-mil cover from a brand with real customer feedback tends to outperform an unbranded 16-mil cover with no track record.
- Shortest realistic lifespan of the three tiers under daily sun exposure — treat it as a 2-3 season product, not a decade-long investment.
Do you need a reel?
A cover that’s a hassle to remove gets skipped on casual swim days — and a skipped cover saves nothing. Manual reel systems for above-ground pools (14-21 ft wide) run roughly $140-$190 at most retailers, mounting to the pool wall or deck so one person can crank the cover on or off in under a minute. For larger in-ground installs, powered reels exist (one widely-sold motorized unit lists around $400+, with some models seen discounted from well over $1,000) and turn the job into pressing a button — worth the extra cost if the alternative is a cover that never actually gets used.
The bottom line
Thickness, not color, is the real decision: 8-mil if you’ll be handling the cover solo and want the lowest price, 12-mil (Blue Wave) as the balanced default for most above-ground and in-ground pools, or 16-mil (Sun2Solar 1600 Series) if maximum heat absorption matters more than easy handling — and plan on a reel if that’s the difference between using it daily or leaving it in the garage. Per the DOE, this is the single highest-ROI accessory you can buy for any pool heater on this site, gas, heat pump, or solar, because evaporation — not conduction or radiation — is the biggest way a heated pool loses the heat you paid for.
Published October 2026.
Sources: Energy.gov — Swimming Pool Covers, Cascade — Swimming Pool Energy Savings breakdown, Bob Vila — Best Solar Pool Covers, InyoPools — Clear vs. Blue Solar Blanket, PoolResearch — Solar Pool Cover Bubbles Up or Down