This Solar storage tank is specially designed to be compatible with direct solar heating systems. Rigid, polyurethane foam insulation keeps heat in the tank. The tank meets or exceeds the most demanding energy efficiency standards without an extra insulation blanket.
The electric element assists the system only when the solar energy cannot maintain the desired temperature or during periods of peak demand. Automatic temperature control thermostat keeps stored water at desired temperature. Our 80 gallon unit has two internal heat exchangers for systems that use heat transfer fluids.
Brass drain valve
Threaded stud located near the outlet for attachment of tank sensors
Temperature and pressure relief valve included
Collector feed and return fittings located at front of tank for convenient installation
2" thick polyurethane foam insulation reduces heat loss
High efficiency heating element
Cold water inlet brings cold water to tank bottom to prevent mixing with heated water
Anode rod equalizes aggressive water action for prolonged tank life
Automatic temperature control
Thermostat gauge to control temperature
A typical family of four in the U.S. uses about 80 gallons of hot water each day. To heat that water with electricity takes about 16 pounds of coal. In sunny Colorado, a standard solar hot water system can supply 60% - 95% of this energy, pollution free from the sun, while saving its owners about $250 per year.
Solar heated water may be stored in a tank that also houses an electric backup heating element (a "one-tank" system), or in a separate tank that feeds into the tank of a conventional gas or electric water heater (a "two-tank" system). The tanks are approximately the same size as modern hot water tanks, around 80 gallons or 300 liters. Solar energy preheats the household water. At night and on cloudy days, the conventional backup heater boosts the water to the desired temperature.
On sunny days, however, when a typical solar system can raise water to 140°F, the backup heater remains off. On-demand hot water heaters that heat needed water instantly "on-demand" can also be used as a back-up system for solar hot water.
