A solar water heater's efficiency is measured in various ways, making it crucial to know the different metrics before investing in or purchasing one. The primary goal of a solar water heater is to transform sunlight into heat energy, which is then used to warm water for commercial purposes.
The most widely used method of evaluating solar water heaters is based on their heat efficiency, which typically falls between 50 to 90 percent. Heat efficiency refers to the system's ability to convert the sun's energy into usable heating. This percentage is usually denoted as a 'collector efficiency' since it gauges how efficiently the solar collector is able to utilize and transfer heat from the sun to water. Some manufacturers provide higher efficiency performances by emphasizing on higher heat transfer, effective insulation, and reduced heat loss during transfer and circulation processes.
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