Hi I got the panel on freecycle.com, I had to solder it in a few spots. I just recently drained the system because of freezing weather and an filling with rv antifreeze. I will be taking pictures soon and post a new instructable. The tank under the floor is the existing 12 volt water tank that I plumbed to the panel. It is completely separate of the fresh water system. It was performing well on the few sunny days we've had this winter.