I recently noted that Hawaii has enacted a law that requires all new homes to install solar water heaters. Eventually, Hawaii may have as many water heaters as Israel, where 90% of homes have solar water heaters installed. When viewed from above, the Jerusalem often glitters with the shine of the thousands of solar heaters… [Continue Reading]
Hawaii has become the first state to require solar water heaters in new homes. The bill was signed into law by Governor Linda Lingle, a Republican. It requires the energy-saving systems in homes starting in 2010. It prohibits issuing building permits for single-family homes that do not have solar water heaters. Hawaii relies on imported… [Continue Reading]
Rizhao City, which means City of Sunshine in Chinese, has a unique dedication to the sun. In Rizhao, 99% of households in the central districts use solar water heaters, and most traffic signals, street and park lights are powered by photovoltaic solar cells. In the suburbs and villages, more than 30% of households use solar… [Continue Reading]
For solar water heating in your home, there are basically two types of solar collectors: conventional flat-plate collectors and evacuated tube collectors. Evacuated tubes have a number of advantages: the work on overcast days, in colder weather, and the tubes can be installed and replaced individually without special tools.