Chinese manufacturer TCL Solar, part of TCL’s solar business, presented its C2 back-contact (BC) PV module range at the Solar & Storage Expo Conference in Vicenza, northern Italy, last week.
Originally unveiled in Asia in early summer, the new products are now available for European orders, with first deliveries starting in the United Kingdom. The launch expands TCL Solar’s back-contact portfolio, following earlier products marketed under the TCL Solar and SunPower brands.
The new series comprises products for residential and larger-scale applications.
The C2 residential module uses 108 BC cells and is available in 480 W and 485 W versions, with efficiencies of 23.6% and 23.8%, respectively. The panel measures 1,800 mm × 1,134 mm × 30 mm and weighs 24.7 kg.
For larger projects, TCL Solar’s C2 M is available in six power classes ranging from 645 W to 670 W, in 5 W increments. Module efficiency ranges from 23.9% for the 645 W product to 24.8% for the 670 W version. The n-type bifacial, double-glass module uses 132 G12R back-contact cells. It measures 2,382 mm × 1,134 mm × 30 mm and weighs 32.5 kg.
The C2 M has a power bifaciality of around 75%. TCL Solar lists bifaciality coefficients of 80% for maximum power, 100% for open-circuit voltage and 80% for short-circuit current.
Both module formats incorporate 2.0 mm heat-strengthened, anti-reflective coated front glass and 2.0 mm heat-strengthened rear glass, an anodized aluminum-alloy frame and an IP68 junction box with three diodes. They are rated for maximum static loads of 5,400 Pa on the front and 2,400 Pa on the rear.
Both products operate at temperatures ranging from -40 C to 70 C and have a maximum system voltage of 1,500 V DC. They have a maximum-power temperature coefficient of -0.26%/C. Both carry Class II electrical protection and a Class C fire rating.
TCL Solar offers a 25-year product warranty and 30-year linear power coverage for the residential module, and a 15-year product warranty and 30-year linear performance warranty for the C2 M. Both have a minimum warranted output of 99% after the first year and maximum annual degradation of 0.35%, resulting in 88.85% warranted output after 30 years.
The residential module is packaged at 36 units per pallet and 936 units per 40-foot high-cube container, while the C2 M is packaged at 36 units per pallet and 720 units per container.
TCL Solar said the C2 series is available through authorized distributors across Europe. Pricing has not been disclosed.
The new product line also has clear predecessors inside TCL’s own catalog. TCL Solar’s E Class residential back-contact module, published in late 2025, reached 475 W and 23.8% efficiency. The new C2 S Black raises that to 495 W and 24.3%, while shifting to a gapless design. The progression is even clearer on the large module: the previous E Class HSM-BD66-GR family reached 665 W and 24.6%. C2 L retains the HSM-BD66-GR model family but increases the top rating to 670 W and 24.8%, while reducing listed module weight from 33.5 kg to 32.5 kg.
The launch also comes as TCL expands its back-contact manufacturing capacity. In July, pv magazine reported that TCL Zhonghuan, which is also part of TCL’s solar business, had completed its acquisition of DAS Solar and outlined plans to convert 20 GW of solar cell capacity and 25 GW of module capacity to back-contact production.
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