In early November 2025, Free Malaysia Today reported partnerships between Malaysian developers and Chinese module manufacturers introducing heterojunction (HJT) solar PV technology to local projects. From an installer view, HJT matters because Malaysian rooftops are hot — and HJT modules lose noticeably less yield in tropical heat compared to mainstream PERC panels.
- HJT (heterojunction) = mainstream high-efficiency module architecture for 2025-2026
- Typical HJT module efficiency: 22.5%–24% (vs PERC at 20–21%)
- Better temperature coefficient — higher yield in hot Malaysian climate
- Bifacial gains useful for ground-mount and certain commercial rooftops
- Manufacturing partnerships indicate local supply chain maturation
Why HJT matters for tropical solar
Module efficiency on a spec sheet is only part of the picture. What actually matters in Klang Valley is how the module performs at 60-70°C surface temperature — which is what your roof hits at midday. Every degree above the lab-rated 25°C cuts output. HJT's temperature coefficient is roughly −0.24% per °C versus PERC at around −0.35% per °C. Real-world impact in Malaysia: HJT typically delivers 5-8% better annual yield than PERC on the same roof.
What this means for installations
Higher efficiency translates into fewer modules for the same kWp — useful when roof space is tight (we see this often on terrace houses in Cheras and Subang). For a 6 kWp residential install, HJT might need 12 panels instead of 14 for PERC, saving roof area and structural load. The pricing premium is narrowing as HJT scales globally; in 2026 we typically quote HJT at 5–15% over PERC depending on supplier.
What we recommend
For most residential Solar ATAP customers in 2026, our default is TOPCon — best cost-effectiveness for standard installs. We push HJT when (a) roof area is tight, (b) the customer wants maximum lifetime yield, or (c) the system is bifacial (commercial ground-mount or certain commercial rooftops). For commercial installs, HJT often wins on lifetime IRR despite the upfront premium. We model both options for every commercial quote — see our commercial solar page or just send us your bills and we'll lay it out side by side.
Source
This summary is based on reporting from Free Malaysia Today. Read the full original report at the source link for the publisher's complete coverage.