3 ms·Solar panels are cheap. A single mirror that size likely will cost more than the panel itself.by turtlebits 1y agoSolar panels are cheap. A single mirror that size likely will cost more than the panel itself.giantg2 1y agoWhy would it be? All you need is an aluminum PVD or plated piece of plastic with a protective coating. Should be pretty cheap.kragen 1y agoCoroplast and aluminized boPET should be a perfectly adequate mirror.