With the crazy weather this July and August here in Iowa I didn't get to see how the panels could perform under good conditions. Well, I've finally gotten a chance to see how the panels perform over the last few weeks. Evening air temps in the low 50's, and daytime highs in the 70's, the cloudless days have really allowed the panels do their thing. Pool only gets sunlight from around noon till 4:30 this time of the year. With all that, I'm holding 80 degrees in the pool (achieved around 1 pm each day) even though at this time of the year the angle of the sun means I get sun on the panels from about 9 until 5, and not very direct rays at that. I have 4 4X12 TechnoSolis panels aimed south for my 15X33 AGP, with a Goldline controller. The solar cover at night is essential.
Very pleased with the panels. One more would be nice, but not essential.