Dinto Solar, a Chinese maker built on a single solar chemistry, marked its ninth year with a company account of what that focus has produced: integrated research and manufacturing, a planned 15 GW of heterojunction capacity in China, and installations in more than 30 countries.

Heterojunction, or HJT, cells take a crystalline silicon wafer and coat it with thin layers of amorphous silicon, which lets the cell capture more of the light and lose less voltage at the contacts. The approach can reach higher efficiencies than the dominant mainstream designs, but it asks for different production equipment and, traditionally, more silver in the metal contacts — which is why the company highlights both silver-metallised and copper-metallised versions.

The distance from a laboratory curve to a shipped module

The company was founded in 2017 through the Central Research Institute of State Power Investment Corporation, a state generator, and says it had spent more than 400 million yuan, about USD 59 million, on HJT research by the end of 2025, a figure it puts above a quarter of revenue. It reports more than 120 patents. Its flagship large-format module is quoted at 760 W and 24.47 per cent efficiency. On delivery, it says it completed technical review, contracting, volume production and a first batch for a 200 MW residential project for China Huadian in Shandong within a week in 2025, signed more than 2 GW of orders that year, and won places on procurement frameworks run by China Datang and POWERCHINA in 2026. It is now working toward tandem cells, stacking HJT with perovskite, for efficiencies above 30 per cent.

The module's power and efficiency are the maker's own figures, and HJT's difficulty has never been the record in a laboratory but what the company calls its golden triangle of yield, cost and reliability in volume production. A planned 15 GW footprint is a plan, and efficient tandem cells remain a research target rather than a product.