Solar Tech Roadmap to 2035

What solar technology is coming next?

Solar panel technology roadmap for UK homes: NOW (2026): PERC mono-crystalline (20-22% efficiency, £240-£280/panel). HJT heterojunction (22-24%, £300-£350). Half-cut cells standard. All-black aesthetics dominant. 2027-2028: TOPCon N-type becomes mainstream (22-24%, replacing PERC). Price premium disappears. Better low-light and temperature performance. 2028-2030: PEROVSKITE-SILICON TANDEM cells arrive for residential (28-30% efficiency). Oxford PV (oxfordpv.com) leading commercialisation. 40% more power per m² than today. Initially 20-30% price premium. 2030-2032: BUILDING-INTEGRATED PV (BIPV) — solar tiles, solar facades, solar cladding become cost-competitive. Roof replacement + solar in one product. 2032-2035: TRANSPARENT SOLAR — windows that generate electricity (10-15% efficiency). Early commercial availability. Unlikely to replace rooftop solar but adds generation to glass surfaces. SHOULD YOU WAIT? NO — today's panels are excellent. Every future technology is an UPGRADE option, not a reason to delay. Waiting 3 years for perovskite costs £1,740-£3,300 in missed savings. Sources: NREL Best Research-Cell Efficiencies (nrel.gov), Oxford PV (oxfordpv.com), IEA PVPS Technology Roadmap, Fraunhofer ISE.