Solar panels and photovoltaic modules TaleSun

TaleSun: a full production cycle since 2010

The TaleSun brand: 4 GW of cells, 5 GW of modules a year

TaleSun Solar is a Chinese solar panel manufacturer founded in 2010 as a subsidiary of the industrial group Jiangsu Zhongli Group, with total manufacturing investment of around 5 billion RMB. The company is based in Suzhou and operates fully automated production lines with an annual capacity of around 4 GW for cells and 5 GW for finished modules.

The TM3G66M and TM7G72M panels

In the "Solar Panels and Photovoltaic Modules" category, TaleSun is represented by monocrystalline panels in two lines: the more compact TM3G66M (620 W, 66 cells) and the TM7G72M line (585-605 W, 72 cells). The difference in cell count directly affects the module's physical dimensions and rated power for the same manufacturing technology.

TaleSun's full control over the production cycle — from manufacturing silicon cells to assembling finished modules at a single site in Suzhou — reduces the risk of quality variance between batches, typical for manufacturers that source cells from third-party suppliers. Vertical integration at this level isn't available to every player in the industry and requires substantial capital investment, which the company committed already at the point of its founding.

Vertical integration and monocrystalline advantages

Monocrystalline silicon, underlying both lines, is grown as a single continuous crystal using the Czochralski method, unlike polycrystalline silicon, which uses many small crystals. That provides higher electron mobility and higher solar-to-electricity conversion efficiency at the same panel area.

The TM3G66M at 620 W is the more compact of the two lines, suiting projects with limited mounting area, where every watt of power per square meter of roof matters — private homes with a non-standard or small roof area, for instance. The TM7G72M line, with more cells and higher power, suits commercial and industrial projects with enough space for larger modules better, where minimizing cost per watt of installed capacity is the priority.

Line choice, warranty, availability and certifications

Warranty terms for TaleSun solar panels include separate periods for the performance warranty (linear power degradation over 25-30 years) and for materials and workmanship, with a shorter period covering possible manufacturing defects. It's the performance warranty that determines a project's real investment payback period, not the marketing figure of overall service life often cited without detailing year-by-year power decline terms.

The power temperature coefficient is a spec worth comparing between models separately from rated wattage: it shows how much output drops as the panel heats up in hot weather, carrying direct practical weight for annual output in regions with long, hot summers.

It's also worth checking a specific model's certification portfolio — IEC standards, fire rating, and independent lab test reports — rather than relying solely on the manufacturer's own marketing claims about durability. Certification from recognized international labs, rather than the company's internal testing alone, gives a buyer added confidence in a panel's stated specs before signing a contract for a large equipment shipment, and it's a detail worth asking for explicitly rather than assuming it's included.

For projects where matching one model line matters for array uniformity, it's worth confirming actual stock availability with the supplier in advance: even manufacturers with a full production cycle periodically adjust their model line-up to current demand, and not every model stays available for order year after year.

Compare line (TM3G66M or TM7G72M), power, temperature coefficient, warranty terms and cell count across the TaleSun models in the catalogue below, and pick monocrystalline solar panels from a manufacturer with a full production cycle that allows quality control at every manufacturing stage, from silicon wafer to finished module.