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Apricus Solar Water Heater Print E-mail
Written by Tim Lyden   

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ImageApricus Solar is a manufacturer of solar water heaters (solar collectors) using evacuated tube and heat pipe technology, solar controllers and a wide range of accessories for solar thermal installations. Apricus products are designed for use in both domestic and commercial applications providing hot water, space heating and even air-conditioning (cooling)




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Complete, Professionally Installed Solar Heating Systems

Also using "SunMaxx" Evacuated Tube, Solar Thermal Systems

SunMaxx Solar


Solar Hot Water Products     

Fortress “Green” Building Supply 508-971-1004


SolarMaxx Solar Hot Water


Solar Hot Water Heating Systems generally include Solar Collectors, Hot Water Storage Tanks, Piping, Controllers, and Circulator Pumps.  They come in two standard system designs:  Active Systems, which include Controllers and Circulators, and Passive Systems, which include no Controllers or Circulators and rely on natural means such as pressure and gravity to move water throughout the system.

The SunMaxx Solar Hot Water Heater line includes many products, including Evacuated Solar Collectors, Flat Plate Solar Collectors, Storage Tanks, Controllers, Circulators, and more.

General Information

Solar hot water heaters have been around for centuries providing millions of people with hot water for various applications. With the improvement of technologies in this industry, solar hot water has become one of the most reliable heating sources found today. With zero emissions and almost no maintenance, these systems are capable of producing enough energy to heat your household and domestic water.


The SunMaxx tubes are also capable of being used in larger solar energy systems such as commercial hot water heating applications. Several customers have used an array of SunMaxx collectors for residential complex hot water heating with an auxiliary boiler system. Flexibility has never been a problem with any of the SunMaxx products whether you are located in central New York or sunny California, we have a product that fill fit your needs.



Fortress “Green” Building Supply 508-971-1004


Description :

Evacuated Solar Collectors from SunMaxx Solar come in two standard sizes; a 20 tube collector and a 25 tube collector.  Each collector features parallel rows of transparent glass tubes, each containing an outer and inner glass wall, a heat pipe with fin, and a coating designed to trap the sunlight within the tube for maximum efficiency in the system.


Perfect for Northern, colder, cloudier climates, Evacuated Tube Solar Collectors are far more efficient for Solar Hot Water Heating in the Northern United States than standard Flat Plate Collectors.  SunMaxx Evacuated Solar Collectors can be used for a number of standard uses, including Domestic and Commercial uses.

Evacuated Solar Tubes

Available Models


            Replacement Tubes

Evacuated Solar Tubes

The SunMaxx series solar evacuated tube collectors offer reliable hot water heating in all climates. Designed for areas where flat plate collectors are insufficient such as colder climates, the evacuated tube technology provides additional insulation around their absorbers to retain heat absorption.


Their modern design is coupled with convenient installation methods. Unlike our flat plate collectors, the evacuated tube series collectors are assembled in modules making it easy to have flexible job times. The first step begins with sizing your application and roofing area, next you assemble the frame and connect all required piping. No need to worry about stagnation with these collectors. Install the evacuated tubes after you have installed the mounting hardware and have pressurized the system. We estimated an average time of 1.5 hour to assemble each collector to be ready for mounting.

Need help determining what to order? Call a specialist today!

Our professionally trained staff are ready to assist you in sizing your solar hot water systems. Get free quotes & sight scan, by calling us at 508-971-1004.



Fortress “Green” Building Supply 508-971-1004


Flat Plate Solar Collectors

These Text Box:  ollectors are great for pre-heating commercial hot water systems,Swimming Pools, and or Hot Tubs


 Flate Plate



Description Flat Plate Solar Collectors have been a Solar Hot Water Heating Industry standard for several decades.  First gaining popularity in the 1970’s, Flat Plate Collectors are widely used around the world, and across a wide portion of the United States.

SunMaxx Flat Plate Solar are among the very best in the industry, and in many climates, they operate at the highest efficiency, are among the most cost-effective, and are very easy to install, service, and maintain.

Flat Plate Collectors are less costly than Evacuated Solar Collectors, but also less efficient than Evacuated Tubes.  Because an evacuated is able to gather sunlight from a full 360 degree collector, the Flat Plate, with its single flat surface, is far less adept at using low level light, and/or overcast









 Pre-Packaged Solar Hot Water Systems




Complete, Professionally Installed Solar Heating Systems

Also Solar Voltaic Systems & Wind Systems


Fortress “Green” Building Supply 508-971-1004



Wind Energy Systems 

Solar Voltaic (Electric)


Apricus Solar
(Highest Efficiency in Solar Water Heater available.)
Apricus Solar Collectors utilize Evacuated Tube and Heat Pipe Technology and offer a wide range of accessories for solar thermal installations. Apricus products are designed for use in both domestic and commercial applications providing Hot Water, Space Heating and even Air-Conditioning (cooling).


Apricus Evacuated Tube Solar Collector
(Cost Effective Solar Heating)

The Apricus Solar Collector or Solar Water Heater is a device that absorbs thermal energy from the sun and converts it into usable heat. The heat is normally absorbed by water, or a freeze resistant water mix, which can then be used to supplement hot water heating, space heating and even space cooling via use of an absorption chiller or dessicant cooler technology.

Below are the key features of the Apricus Solar Collector design.

  1. Internationally certified product
  2. Reliable, efficient, twin-glass evacuated tubes
  3. Copper heat pipes for rapid heat transfer
  4. Easy plug-in installation
  5. Maintenance Free
  6. Suitable for mains pressure water (up to 8 bar/116psi)
  7. Corrosion resistant silver brazed copper header
  8. All stainless steel frame (439 grade SS)
  9. Black or Silver aluminium casing
  10. Stable solar conversion throughout the day (tubes passively track the sun )
  11. The perfect solar collector for domestic solar water heater systems
  12. Ideal for commercial solar water heating applications
  13. Comprehensive 10 year limited warranty
The operation of the solar collector is very simple.

  1. Solar Absorption: Solar radiation is absorbed by the evacuated tubes and converted into heat.
  2. Solar Heat Transfer: Heat pipes conduct the heat from within the solar tube up to the header.
  3. Solar Energy Storage: Water is ciruclated through the header, via intermittent pump cycling. Each time thewater circulates through the header the temperatures is raised by 5-10oC / 9-18oF. Throughout the day, the water in the storage tank is gradually heated.

ImageEvacuated tubes are the absorber of the solar water heater. They absorb solar energy converting it into heat for use in water heating. Evacuated tubes have already been used for years in Germany, Canada, China and the UK. There are several types of evacuated tubes in use in the solar industry. Apricus collectors use the most common "twin-glass tube". This type of tube is chosen for its reliability, performance and low manufacturing cost.


Each evacuated tube consists of two glass tubes made from extremely strong borosilicate glass. The outer tube is transparent allowing light rays to pass through with minimal reflection. The inner tube is coated with a special selective coating (Al-N/Al) which features excellent solar radiation absorption and minimal reflection properties. The top of the two tubes are fused together and the air contained in the space between the two layers of glass is pumped out while exposing the tube to high temperatures. This "evacuation" of the gasses forms a vacuum, which is an important factor in the performance of the evacuated tubes.


Why a vacuum? As you would know if you have used a glass lined thermos flask, a vacuum is an excellent insulator. This is important because once the evacuated tube absorbs the radiation from the sun and converts it to heat, we don't won't to lose it!! The vacuum helps to achieve this. The insulation properties are so good that while the inside of the tube may be 150oC / 304oF , the outer tube is cold to touch. This means that evacuated tube water heaters can perform well even in cold weather when flat plate collectors perform poorly due to heat loss.


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