What does intelligent shade management in TCL Solar Back Contact technology mean?

Thanks to the cell's low breakdown voltage and unique architecture, each cell exhibits a built-in cell-level bypass diode function. In practice, a shaded cell can effectively bypass itself, reducing its energy consumption while preventing major system-level power loss in partial shading. This design also minimises hotspot formation and supports more reliable long-term operation. For installations with intermittent or uneven shading, whether from vegetation, bird droppings, surrounding buildings or dust, TCL Solar Back Contact provides a clear performance advantage.

Why should I choose TCL Solar Back Contact panels?

TCL Solar Back Contact technology delivers more power by increasing conversion efficiency, supports higher reliability in real-world conditions, and provides a modern sleek appearance. With an elegant look and robust performance, the TCL Solar Back Contact panel is a leading choice for next-generation solar installations.

What are the advantages of using TCL Solar Back Contact panels?

Higher power generation, with a low temperature coefficient of -0.26%/°C that outperforms TOPCon in hot conditions by over 1.3%, an annual degradation rate below 0.35% that retains 88.85% of output after 30 years, and superior shading performance that limits power loss to only the shaded area, reducing shading impact by up to 34%. High reliability, with full-backside continuous soldering and a zero-busbar (0BB) design for better microcrack resistance, low breakdown voltage that reduces hotspot risk, and operation around 0.5°C cooler than TOPCon for improved longevity.

Back-Contact Solar Panels

Next-generation high-efficiency silicon solar cells

Datasheets

What is Back Contact Technology?

Back Contact (BC) solar cells are high-efficiency technology solar cells where both the positive and negative electrodes are placed on the backside of the cell. That means no busbars in the way, covering the front of the panels. This design effectively reduces shading area and enhances the absorption and utilization efficiency of sunlight. The founder of back-contact technology is Dick Swanson, also founder of SunPower.

Our Back Contact key advantages

High cell efficiency

Efficiency improvement by 6% to 10% compared to traditional cells.

Intelligent shade & temperature management

Cell-level bypass diode technology for shading optimisation and a better temperature coefficient.

Enhanced reliability

Lower operating temperature and anti-crack construction for dependable long-term performance.

No trade-off between aesthetics and efficiency

No busbar design eliminates front metal lines, presenting a more visually appealing rooftop installation.

More power on your roof, faster battery charging

More yield brings over 4% more rooftop capacity than TOPCon, so you can fit more solar on your roof, generate more energy and charge more power on your home battery for later use.

Backed by TCL Solar warranty

Up to 25 years product and 30 years power. May vary from one country to another.

Our Back Contact solar panel range for every project

Residential & commercial

E-Class 475

Up to 475W
Up to 23.8% efficiency
Monofacial in white or black glaze
Bifacial in white or black glaze

Documentation

Warranty

25 yr product / 30 yr power

Commercial

E-Class 545

Up to 545W
Up to 23.5% efficiency
Bifacial
White glaze

Documentation

Warranty

15 yr product / 30 yr power

Commercial & large scale

E-Class 660

Up to 660W
Up to 24.4% efficiency
Bifacial
White glaze

Documentation

Warranty

15 yr product / 30 yr power

How is Back Contact different to standard front-contact panels?

Back Contact technology is considered a key pathway for next-generation high-efficiency silicon solar cells. Unlike front-contact designs, Back Contact cells place both positive and negative contacts on the back of the cell. This removes the shading caused by frontside metal gridlines, allowing more sunlight to reach the active area and reducing the surface recombination rate, leading to higher power generation and improved efficiency.

Furthermore, the Back Contact design significantly improves the panel shade management, minimising hotspot formation and enhancing reliable long-term operation.