TOPCon Panels Capture 65% of US Residential Installations in Q1 2026

Tunnel oxide passivated contact (TOPCon) solar panels have reached 65% of US residential solar installations in the first quarter of 2026, surpassing PERC technology for the first time since crystalline silicon panels became the residential standard. The shift reflects falling TOPCon manufacturing costs — now within $0.02–$0.04 per watt of PERC — alongside efficiency gains that allow more power from smaller roof footprints. Leading TOPCon manufacturers including Jinko Solar, Canadian Solar, and LONGi now offer residential modules rated between 420 W and 450 W in standard 60-cell form factors, with temperature coefficients of around -0.30%/°C compared to -0.35%/°C for PERC. The practical advantage is meaningful in hot climates such as Arizona, Texas, and Florida, where panels routinely operate above 50°C. PERC production lines are gradually being retooled rather than scrapped, with manufacturers noting a 2–3 year transition runway. N-type PERC variants briefly served as a bridge technology but have largely been bypassed. HJT (heterojunction) panels continue to occupy a premium niche at 22–23% efficiency but carry a 15–20% price premium that limits mainstream adoption. Analysts project TOPCon share will reach 80% of US residential installations by end of 2027 as remaining PERC inventory clears.