500 Liter Solar Water Heater Hot Water Tank Single Coil Electric Backup

July 6, 2013 - Comment

Active solar water heaters utilize an antifreeze as the working fluid in the system. This fluid carries the heat collector from the sun to a tank stored in a different location. In order to exchange heat to the water within the tank, a heat exchanger is required. Our solar water tanks come with a built-in

Active solar water heaters utilize an antifreeze as the working fluid in the system. This fluid carries the heat collector from the sun to a tank stored in a different location. In order to exchange heat to the water within the tank, a heat exchanger is required. Our solar water tanks come with a built-in copper heat exchanger, so the working fluid can simply pass through the coil, thus heating the water inside. Stainless Steel Tanks Are Better than Vitreous Enamel Tanks Our tanks are made of food grade stainless steel layered with a galvanized steel shell on the outside for increased strength against high pressures. Stainless steel is superior in solar water heating applications because it can handle the very high temperatures produced by solar water heaters, has excellent corrosion resistance and can handle the constant high pressure resulting from constant heating throughout the day. Vitreous enamel tanks are made of carbon steel and utilize a glass lining to protect the steel from corrosion. Unfortunately, these cheaper style tanks cannot handle the constant pressure in solar water heater systems. When the water temperature rises to 70°C or greater, which is typical for a solar water heater system, there is high risk of cracking of the glass lining due to excessive expansion and sticking to the carbon steel. Once cracks have formed, the carbon steel may rapidly corrode due to exposure to the water, which often results in premature failure.

Product Features

  • Copper Coil Heat Exchanger for exchange of heat from solar water collector
  • Top & Side Hot Water Outlets, Magnesium Anode Rod, T/P Valve, Water Purging Port
  • Electric Backup heating with on/off switch and manual thermostat

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Comments

Carlton says:

Better Alternatives First, solar hot water heating is no gimmick. It can save serious money. My gas bill plummeted from $128 during the summer to under $25 a month with my previous solar hot water heater, which had an external heat exchanger. This one has an internal heat exchanger, which, theoretically, is better. However, solar makes most sense for people who already have a primary water heater, especially, gas, which can be shut off during the summer to avoid heating the house with the output from gas combustion, and just using the sun or electric backup on cloudy days.In any case, this Asian-manufactured tank, has lots of issues. I ended up selling it to an apartment complex because of its poor design and dangerous electric hookup, which uses what appears to be 14 gauge stranded wire to connect the heating element to a 240 volt supply! Any electrician will tell you that’s dangerous. In addition the electrical knock out for the heater is too small for a 10 gauge wire knockout without…

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