Comprehensive Guide to Buying Solar Water Heaters

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Solar water heaters are a sustainable and cost-effective alternative to traditional water heating systems. By harnessing the power of the sun, these systems can provide hot water for households, businesses, and industries. However, choosing the right solar water heater can be challenging, as there are several factors to consider. In this guide, we’ll discuss the things you should consider before buying a solar water heater.

1. Climate and Sun Exposure

One of the most crucial factors to consider when buying a solar water heater is your climate and sun exposure. Solar water heaters work by collecting sunlight and converting it into heat, so they perform best in areas with high levels of sun exposure. If you live in a region with cloudy weather or low levels of sunlight, a solar water heater may not be the best option.

2. Type of Solar Water Heater

There are two types of solar water heaters: active and passive. Active solar water heaters use pumps and controllers to circulate water and control the heating process, while passive solar water heaters rely on gravity and natural convection to move water and heat it. Active solar water heaters are more expensive but can be more efficient, while passive solar water heaters are less expensive but may not work as well in colder climates.

3. Size of the Solar Water Heater

The size of the solar water heater you need will depend on several factors, including the number of people in your household, the amount of hot water you use, and the climate in your area. A general rule of thumb is that you’ll need 20 square feet of collector area for every two people in your household.

4. Quality of the Solar Water Heater

When buying a solar water heater, it’s essential to consider the quality of the system. Look for products that have been certified by independent organizations like the Solar Rating and Certification Corporation (SRCC). These organizations test and certify solar water heaters based on their performance, efficiency, and durability.

5. Installation and Maintenance

Installing and maintaining a solar water heater can be more complicated than installing a traditional water heating system. It’s crucial to choose a reputable and experienced installer who can ensure that your system is installed correctly and safely. Additionally, solar water heaters require regular maintenance to ensure that they’re operating efficiently and effectively.


Solar water heaters can be an excellent investment for those looking to reduce their carbon footprint and save money on energy costs. When buying a solar water heater, it’s essential to consider factors such as climate and sun exposure, type of solar water heater, size of the system, quality, and installation and maintenance. By doing so, you can ensure that you choose a solar water heater that meets your needs and provides reliable hot water for years to come.

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