Best Solar Pool Heating Panels: 5 Certified Collectors Compared
Unglazed pool collectors side by side using their OG-100 certificates: panel sizes, header size, certified seasonal efficiency and how much each loses in a breeze.
Solar Water Solutions
Solar Water Solutions helps households and property owners choose a solar water heating system. We explain how solar thermal systems work, how they differ from solar PV panels, which system types suit which climates and how to size, compare and maintain a system.
Latest Reviews
Expert opinions on the newest products
What Affects Solar Water Heater Efficiency and Performance
Two similar solar water heaters can deliver very different results. Here are the factors that decide performance and how ratings capture them.
Solar Water Pumps Explained: How PV Pumping Systems Work
Solar water pumps use PV panels, not solar heat, to move water. Here is how the systems work and how they are sized for a well or livestock.
Types of Solar Water Heating Systems: Active, Passive, Direct, Indirect
Solar water heaters are sorted by how they move heat and how they handle freezing. Here is what each system type means for a home.
Solar Water Heating Costs and Efficiency: How to Evaluate a Proposal
Whether solar water heating pays off depends on your climate, hot water use and backup fuel. Here is how to evaluate a proposal with your own numbers.
Solar Water Heating Explained: How It Works and Where It Fits
Solar water heating uses the sun's heat directly, not solar electricity. Here is how it works, the main system types and where it fits.