10 Best Pool Solar Heaters 2025 in the United States

The BigXwell Solar Pool Cover is a well-rounded option for those looking to naturally heat their in-ground swimming pools while cutting down on energy costs. The cover is designed with 16-mil thickness and thousands of thermal bubbles to efficiently harness and retain heat from the sun, making it a great choice for maintaining a comfortable pool temperature even on cloudy days or cooler nights. This can reduce your reliance on traditional, more costly heaters and lower your energy bills. Additionally, the cover helps protect your pool from dirt, debris, and unwanted guests, which can decrease maintenance efforts and costs over time.

By minimizing water and chemical evaporation by up to 95%, it also ensures you won't need to constantly refill your pool or add chemicals, saving further resources and costs. Installation is simple, as it merely floats on the water's surface, and its lightweight makes removal and storage straightforward. However, it is worth noting that due to its polyethylene material, it might not be as durable as some other materials under extreme weather conditions over the long term.

This product is particularly suitable for pool owners who prioritize energy efficiency, ease of use, and maintenance reduction. The cover comes in a standard 12x24 foot size, which is perfect for most in-ground pools.

The SolarPoolSupply High Performing Design solar pool heater system is a solid choice for pool owners looking to harness solar energy for heating their pools efficiently. One of its standout features is its advanced technology that maximizes heat capture and transfer, ensuring that your pool warms up effectively. With a construction that includes high-grade materials designed to withstand harsh weather conditions, you can expect a lifespan of 15-20 years, which is impressive for this type of product. The full DIY kit provides all the necessary components for installation, making it accessible for those who prefer a hands-on approach. You also get expert support, which can be quite valuable for first-time installers.

However, it’s important to consider some potential drawbacks. While the system is designed to connect seamlessly with existing pool pumps and filtration systems, the requirement for additional PVC piping might complicate installation for some users. Additionally, the product's performance can be highly dependent on your local climate and geographical positioning, so those in less sunny areas might not achieve optimal heating results. The ranking in the swimming pool heaters category suggests it’s a competitive option, but there are other brands that might cater to specific needs or preferences better. Lastly, while the durability and lifespan are commendable, any solar system's efficiency can be affected by factors such as maintenance and environmental conditions.

This solar pool heater system is well-suited for pool owners who are motivated to invest in a long-term, eco-friendly heating solution and are comfortable with a DIY installation. With solid performance and good durability, it stands out, but users should take climate and installation considerations into account before making a decision.

The Intex 28015E Solar Pool Cover is designed for 18ft round Easy Set and Metal Frame Pools. One of its standout features is its simplicity in use; you just lay it on top of your pool and let the air bubbles absorb and transfer heat from the sun to the pool water. This cover excels in protecting the pool from debris, reducing water evaporation by 95%, and minimizing chemical consumption, which can save you money over time.

It's constructed from durable plastic that ensures longevity and is designed to float, making the installation process straightforward. However, it's important to note that while it insulates the pool water, it may not provide the same heating capacity as more sophisticated solar heaters with multiple panels. Additionally, the cover primarily serves to keep the pool clean and maintain water temperature rather than significantly heating the pool.

It's water-resistant and easy to clean, but you must ensure proper maintenance to avoid mildew. If you’re looking for a cost-effective way to keep your pool clean and reduce evaporation, this cover is a solid choice. However, if substantial heating is your primary goal, you might need to consider additional solar panels for more effective results.