If you’re considering investing in a solar pool heater but aren’t quite sure if a pool heat pump is better, this Solar vs Electric Pool Heater article is a helpful tool in showing you a breakdown of the costs and benefits associated with each product to help you make an informed decision that suits your pool-heating needs.
Let’s start with electric pool heaters.
Solar vs Electric Pool Heater
Electric Pool Heat Pump
Over the past decade, electric heat pumps have become increasingly popular in the pool industry, especially for new-construction pools. However, this popularity has also led to rising electric bills for homeowners due to the energy demands of these systems.
An electric heat pump works similarly to an air-conditioning unit. Its efficiency is closely tied to the air temperature compared to the pool water temperature. When the outside temperature is high and close to your desired pool temperature, the heat pump operates efficiently. However, as temperatures drop, the efficiency of the heat pump decreases significantly, leading to higher electricity consumption and costs.
Understanding the Science behind Electric Pool Heaters
For each unit of electricity (kWh) consumed, an electric heat pump can deliver up to 5 or 6 units of heating energy (kBTU/hr) to your pool water. However, this efficiency drops as ambient temperatures fall. In cold weather, heat pumps may become inefficient or even cease to function. Therefore, during cooler months or early mornings, heat pumps must work harder, resulting in higher electric bills.
The size of the heat pump needed depends on the size of your pool. Manufacturers provide different sizing guidelines, but generally, a pool of 350 to 400 square feet might require a 110kBTU/hr. unit, while larger pools may need a 125kBTU/hr. unit. Larger units draw more electricity, leading to higher operational costs. On average, using a mid-sized pool heat pump for regular heating can increase your monthly electric bill by $80 to $120.
Cost Breakdown on Electric Heat Pumps
Electric heat pumps offer relatively efficient pool heating, but they come with ongoing operational costs. Here’s a cost breakdown for an average-sized pool (350 to 400 sq. ft.):
- Average cost per unit: $3,200 (installed with existing electrical connection)
- Additional electrical connection: $1,200
- Monthly electrical consumption: $120 (running 4 – 6 hours per day, 6 months per year)
According to energysavers.gov, the cumulative operating costs for an electric heat pump over 10 years can reach up to $14,000, considering the cost of electricity and potential system replacements.
Solar Pool Heater
Solar pool heaters offer a cost-effective alternative to electric heat pumps, as they incur no direct operational costs. These systems rely on solar energy to heat your pool water, making them an eco-friendly choice.
Understanding Solar Pool Heating Systems
Solar pool heaters work by circulating pool water through solar collectors, typically installed on the roof or another sun-exposed area. The water is heated as it passes through the collectors and is then returned to the pool. This process can raise the pool temperature by up to 15 degrees Fahrenheit above that of an unheated pool, depending on the amount of sunlight and weather conditions.
Considerations for Solar Pool Heaters
While solar pool heaters are highly efficient during sunny days, their performance can vary with weather conditions. They may not be as reliable for quick heating, such as heating a spa, as it can take a few hours to reach desired temperatures. However, they are effective at maintaining warm pool temperatures throughout the day, especially during warmer months.
Why Solar Pool Heaters are the Optimal Pool Heating Options
One of the main advantages of solar pool heating is the absence of operating costs. These systems use your existing pool pump to circulate water, eliminating additional energy expenses. Solar pool heaters are also known for their durability, often lasting twice as long as electric heat pumps. At UMA, our solar systems come with a 12-year warranty, ensuring long-term performance and minimal maintenance costs.
Cost Breakdown on Solar Pool Heaters
Here’s a cost breakdown for an average-sized pool (350 to 400 sq. ft.) using a solar pool heater, which typically requires 8 – 9 solar panels:
- Average installation cost (includes permit, plumbing, and automated temperature control panel): $4,800 – $8,200
This cost range depends on permit fees, roof type, home structure, pool equipment, plumbing condition, and the optimal location for the solar system. With no additional electrical fees, a 12-year warranty, low maintenance, and virtually worry-free operation, solar pool heaters offer significant long-term financial benefits.
Benefits of Combining both Solar Electric Pool Heater
A third option to consider is combining solar and electric heating systems. This hybrid approach allows the solar pool heater to handle most of the heating, reducing the operational burden on the electric heat pump. As a result, the heat pump operates less frequently, lowering your electricity costs.
Automation systems can seamlessly integrate both systems, providing optimal heating efficiency. Many homeowners who install solar panels alongside an existing heat pump find that they rarely use the heat pump, relying primarily on the solar system for daily heating needs.
If you’re interested in learning more about solar pool heaters or combining your electric pump with solar panels, we’re here to help.
