Passive Solar Water Heater Ratings, A Repairman Reviews The Brands...

With our passive solar water heater ratings, you can cut through all of the sales hype and find value. We have researched the brands from all over the world and compared them using our heating system service experience. It truly is like taking a repairman with you while you shop! We have given you our top picks followed by a complete list of manufacturers and their ratings.

   Top Loop System:

Our top choice for a passive loop system is from PROGRESSIVTUBE. This brand is from THERMAL CONVERSION TECHNOLOGY and is available in the U.S. The systems consist of an all copper collector/storage tank for durability. They are backed by a very good warranty.

World's Best Batch Solar WH:

Our top pick is from GLAS-TEC. The Cornell 480 units are offered as a complete unit or as a kit. The installation is simple and the units are backed by a solid guarantee.

Other Passive Solar Water Heater Ratings

We continue our passive solar water heater ratings with an alphabetical list of manufacturers and reviews of their products. You can continue to browse our alphabetical list but, if you are looking for a specific brand, you can enter its name in the search box at the top of the page.



This brand is made in Turkey. Their website is not much help and the guarantee on the units is not very good.


These water heaters are available in three sizes (150,200, 300 liters). They use basic technology and their website is not much help.


These systems are made in Spain and are available in Europe. They offer both standard systems for mild climates as well as drainback units for colder climates. Both types offer optional backup immersion elements with thermostats.


This brand is made and sold in India by THE STANDARD PRODUCT MFG. CO. The units use the less efficient flat plate collectors but have a stainless steel storage tank for durability. The manufacturer's website is not much help and the warranty on the units is not as good as most other brands.


The SlimSolar water heaters use efficient evacuated tube collectors. The systems have an innovative tank design and they are made of stainless steel. Their website is not much help and does not have a stated guarantee for their products.


This brand offers water heaters in 200 or 300 liter sizes. The SOLERIO SELECT units use basic enameled steel tanks. They are available in terrace models as well as standard roof mount units.

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