>> Newer panels can be in place of roof tiles but I don't know much about
>> them
Some years ago now, c 2006, we were at an NT place in the West Country where what, at first glance, looked like ordinary interlocking tiles actually were photovoltaic devices. They may have been on the wrong side of the cost/benefit curve because of their location but they were doing what they were meant for in terms of their design/location.
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