Soni Biehl of the Maine Solar Energy Association conducted a hands-on workshop in Bridgton, Maine. A dozen participants from Maine, New Hampshire and even Ireland actually built a solar hot water panel from materials commonly found in any building supply store. The unique glycol-jacketed copper tubing system can be built by anyone with a rudimentary knowledge of plumbing. One can build such a hot water solar panel for under $300. Such a unit produced commercially would be $1,000 and up.