These pumps are great. As a solar thermal contractor, Ive installed dozens of these pumps with very few issues. The people who rated these pumps poorly, like the guy who tried using this as a DB system pump, understands pump physics and hydronics poorly. A DB pump needs to be able to create 2-4 ft FPS through a collector on start up and hold that in order to entrain the air and keep it in the DB tank. Seeing as this pump is wholly dependent on its PV source, aka the sun, which we all know isnt always stable its an incredibly poor choice for a DB pump.
Well built, dependable, and easy to install.
This review has votes.