Greetings, I am relocating my two panel solar hot water system and I am thinking about adding a third panel to up the BTUs during the winter days. My question is, should I consider setting the glycol panels up so I can turn some valves to shut off one panel during the summer or is it better to just get a controller that can manage the heat loads during the summer for me and some how keep them from getting too hot. I do know that I will need to drain the isolated panel during the change over and it will be a pain, but the goal would be to have more hot water during the winter. Thanks in advance for your thoughts.