SunMaxx Thermosyphon Systems are extremely affordable and efficient, and offer one of the most reliable and cost-effective sources of Solar Hot Water available on the market. There are numerous reasons why a SunMaxx Thermosyphon Solar Hot Water System may be the right choice for you, including:
Affordability
SunMaxx Thermosyphon Solar Hot Water Systems are extremely affordable. A 40 Gallon System costs under $1000, and is more than adequate to supply the domestic hot water needs of a household with 1, 2 or 3 people, and an 80 gallon system is costs under $1200 and is capable of providing the hot water needs of households of 4 to 5 people, significantly reducing your monthly bills for domestic water heating.
Proven Technology
SunMaxx Thermpsyphon Solar Hot Water Systems are built around our industry-leading SunMaxx Evacuated Tube Solar Collectors. The main difference in the solar collectors is that SunMaxx Thermosyphon Solar Hot Water Systems feature direct flow Evacuated Tubes – water, or glycol is heated directly in the tube and used to heat the water within the storage tank instead of using a heat pipe and condenser for indirect heating. The 40 Gallon SunMaxx Thermosyphon Solar Hot Water System utilizes a 20 tube Solar Collector and the SunMaxx 80 Gallon Thermosyphon System uses a 30 tube solar collector.
Flexibility & Versatility
SunMaxx Thermosypon Solar Hot Water Systems are extremely versatile, allowing for significant flexibility in system design and installation. Thermosyphon Systems can be installed as either active or passive systems, allowing you to limit the need for additional components, such as pumps, circulators and expansion tanks. In fact, in its passive form, a SunMaxx Thermosyphon Solar Hot Water System is one of the simplest system designs to install – this allows customers to significantly reduce their installation and maintenance costs, reducing the overall cost of the system, shortening the payback period and increasing the overall return on investment.
All Inclusive
Every SunMaxx Thermosyphon Solar Hot Water System includes the Direct Flow Evacuated Tube Solar Collector, Mounting Hardware Frame, Integrated 40 or 80 gallon storage tank, overflow tank and a backup electric heating element. With all of these major components in one package, for thousands of dollars less than other Solar Hot Water Systems, SunMaxx Thermosyphon Solar Hot Water Systems become one of the most cost-effective and wisest investments you can make.
All-Climate Performance
SunMaxx Thermospyhon Solar Hot Water Systems are intended for use in all locations and climates across the United States. Their performance is stellar from the southwest to the northeast, and a single collector system is generally able to handle the domestic hot water needs of most households from 2 to 5 people.
The chart below shows actual testing performance of SunMaxx Thermosyphon Solar Hot Water Systems during March in Upstate New York, a notoriously bad month for weather in that area of the country.
| Performance Graph | ||||||||||||||||||||||||
![]() |
||||||||||||||||||||||||
|
||||||||||||||||||||||||





