In the 1970’s and 80’s Solar Energy first emerged as a potentially viable and cost-effective alternative to traditional heating sources such as fuel oil, natural gas, coal, wood, and electric. Unfortunately, these first generation solar collectors were expensive, inefficient, and delivered long payback periods and lower returns on the initial investment than expected.

In the following decades leaders in the Solar Energy Industry went back to work, striving to create more efficient, more affordable, and more cost-effective Solar Water Heaters that would not only be a viable alternative to traditional heating sources, but would be able to supplant the majority of our heating needs, lowering the world’s dependence on non-renewable energy sources, which cannot be replaced once they are depleted.

Today, there are three main types of Solar Water Heaters available. These collectors are for more efficient and cost-effective than their predecessors, and are well-suited for a number of applications such as small residential installations and pool heating, all the way to large commercial, industrial and municipal installations across the United States, and around the world. These three collectors are Evacuated Tube Solar Collectors, Flat Plate Solar Collectors, and Unglazed Solar Collectors.

Evacuated Tube Solar Collectors – these collectors are typically the most expensive of Solar Thermal Collectors. The unique tube design of these collectors makes them extremely efficient at collecting and transferring heat energy to your home’s hot water. Because of the unique design, Evacuated Tube Solar Collectors, unlike Flat Plate Collectors, are great at operating at high efficiency earlier and later in the day than other solar technologies, and during the winter months when the days are shorter and the sun is a far lower elevation in the sky. This makes Evacuated Tube Solar Collectors far more cost-effective in these climates and locations.

Flat Plate Solar Collectors – these collectors are typically less expensive than Evacuated Tube Solar Collectors, but in warmer, southern climates, can just as, if not more efficient and cost-effective. Flat Plate Solar Collectors are not particularly freeze protected, and like a Solar Panel for PV Energy, require the sun to be directly overhead at as close to a 90 angle as possible in order to operate with decent efficiency. Because of these factors, Flat Plate Solar Collectors particularly ineffective during the winter months in northern, cold climates where freezing is a problem, the days are extremely short, and the sun is at extremely low angles every day. However, in southern climates where winters are mild, the days remain long, and the sun remains at a relatively high angle, because of their lower initial cost, Flat Plate Solar Collectors are one of the most cost-effective Solar Water Heaters available.

Unglazed Solar Collectors – these collectors are specifically designed for Solar Pool Heating. These collectors are effective for Pool Heating because they are low-temperature (about 120-150 F) and high volume heaters. These collectors are the lowest cost of all Solar Water Heaters, often costing under $200 per collector, and are generally constructed of flexible tube like material that can simply be rolled out and mounted directly to a roof, fence, or the ground in a matter of minutes. These collectors are extremely efficient and powerful in all areas of the United States during the summer months, but are not rated to stand up to winter weather such as snow, ice, and freezing temperatures. If you are looking for an affordable way to heat your pool and extend your swimming season earlier in the spring and later in the fall, regardless of where you live, Unglazed Solar Collectors may be the right choice for you.

Any of these Solar Water Heaters can save the average American homeowner hundreds of dollars a year, and thousands of dollars over the lifetime of the system once it is installed and operational. Today, home and water heating costs account for almost 40% of our annual energy bills, and these Solar Water Heaters can replace 65-80% of these costs for an initial investment of just a few thousand dollars. In fact, purchasing and installing a Solar Water Heater often costs as much as installing a new traditional heater, but through energy savings, will pay for itself in as little as 3-5 years.