[Christ]

Originally Posted by bennelson

I would plan on connecting them all in parallel.

The panels have 1" copper pipe all the way through on BOTH the top an bottom of them.

BOTH ends of BOTH the top and bottom pipes would go from one panel to the next to the next.

That way all panels would be in PARALLEL. The incoming (cooler) fluid would go throw the lowest internal pipe to all the panels, flow up through all the the riser tubes, and move through all the upper tubes, then out to the solar storage/tranfer tank.

Shift key stickin'?

I see now how they work. The other type of panels I was looking at (to get context for yours) weren't designed like that, they each had one inlet and one outlet, from bottom to top, like an electrical connection.

Yours, the way they're built, are already in a parallel series, because if the water gets warm enough before it makes it to the other end of the collectors, it just moves up into the hot-flow tube. I under-fer-stand.