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How long does a Solar Water Heater last?
No one can give an exact estimate of how long a solar water heater lasts. Just the same as for any other technical appliance.
However, here is what the Environmental Protection Agency says about solar water heater lifespans:
“A solar hot water system normally lasts 15 to 20 years, which is up to double the life of an electric system. They are a well-proven product and have experienced substantial development over the past decade, with newer models expected to last even longer.”
According to Sue Roaf, author of “The Ecohouse 2 – A Design Guide” (Architectural Press, 2003) writes:
“A good liquid solar collector should have a life expectancy of 20-30 years. Most of the collectors built since 1980 are manufactured with materials that should give a 30-50 year lifespan.”
What follows is that the tank might need replacement before the collectors. As they are two separate pieces only connected by plumbing, it is quite simple to do that.
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