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A Summary of the Three Basic Types of Solar Hot Water Systems

Click to read - Requires Acrobat ReaderIntegrated Collector Storage - (ICS) Copperheart Manufactured by SunEarth Inc. at 4315 Santa Ana Street in Ontario, CA 91761.

The unit is self contained in that the solar collector and storage tank is integrated into one piece of equipment. This is a passive system with no moving parts and operates on local water pressure and solar radiation.

The unit is composed of copper tubes that are center welded. This design ensures the delivery of the hottest water from the top tube with the cooler water remaining in the lower tubes. The unit typically serves as a pre-heater to an existing gas or electric water heater.

ICS units are excellent choices for residential new construction. The system relies upon the thermal mass of the tubes for freeze protection, good for mild climates, but should have additional freeze protection for colder climates. 10 Year Limited Manufacturers Warranty. Click for the SolaRay System Ratings - More SunEarth information

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Click to read - Requires Acrobat ReaderThermosiphon - SUNSIPHON Manufactured by SunEarth Inc. at 4315 Santa Ana Street in Ontario, CA 91761. This is a high performance passive system with no pumps or controls.

The thermosiphon design allows the natural heat convection movement to provide circulation between the solar collectors and the solar tank. As the sun strikes the collectors copper absorber, the fluid rises to the top of the collector, exits the collector and enters the top end of the storage tank.

The solar tank is marine grade stainless steel for long life. The system uses an edible glycol solution between the collector and solar tank loop for freeze protection.

This is the state of the art for passive solar hot water systems. 10 Year Limited Manufacturers Warranty. Click for more SunEarth information

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click for more informationActive Domestic Hot Water System - Manufactured by Heliodyne Inc. at 4910 Seaport Avenue in Richmond, CA 94804. An “active” solar system uses a pump to circulate water between the solar collectors and a separate solar storage tank located near the conventional back-up water heater.

In most cases, the solar collectors are located on the roof. Appropriate plumbing connects the solar collectors to the pump and control.click to enlarge The differential controller has two sensors; one on the collectors and one located at the bottom of the solar storage tank.

Whenever the collector sensor is hotter than the tank sensor the system turns on. When the bottom of the tank reaches 160 degrees the system turns off. One of the key benefits to the active system is that the individual components are easy to replace.

The pump and controls are warranted for 18 months, the solar tank for 5 years. The Gobi collectors carry a 10 Year Limited Manufacturers Warranty.
Click for more HelioDyne information

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