What do you think of Flextron for a zinc roof?
https://www.metalsolutions.uk.com/flextron-solar-panels.htm
The Flextron System is ultra-thin at 2.5mm and contain integrated solar cells, which are then pre-bonded to an approved roofing material, in this case GreenCoat PLX Pro in a complimentary Mountain Grey.
Prices seem to be at a premium currently, unless you know differently. I've looked into similar to retro-fit on my aluminium roof.
As well as the value, I didn't get an answer I was happy with regards how to replace them. The roof should have a 60 year life, but the PV 20 - 25, so at some point they will need replacing. When I asked, the manufactures had not run any trials with regards removing the modules and if damage could be avoided.
