Monocrystalline vs Polycrystalline vs Thin-Film Solar Panels

A commercial building owner in Phoenix, Arizona recently asked a seemingly simple question: “Which solar panel is best for my 2,400 m² warehouse roof?” His installer quoted three completely different systems — one using monocrystalline modules at $0.48/W, one with polycrystalline at $0.31/W, and a thin-film option at $0.27/W — and said all three would […]