FS-6440

Bottom 11% of the CdTe 340-540 W segment, against a median of 18.40%.

Bottom 11% of the CdTe 340-540 W segment, against a median of 184.1.

Bottom 13% of the CdTe 340-540 W segment, against a median of 74.7.

CdTe technology exhibits a power temperature coefficient of approximately -0.28%/°C, compared to -0.40% to -0.45%/°C for standard monocrystalline modules. In practice, at a cell temperature of 70°C (typical during summer), the Series 6 loses approximately 14% of rated power, while a PERC module loses roughly 20-22%. This translates into meaningfully higher annual energy yield in warm climates.

The thin-film CdTe structure is inherently immune to both Light-Induced Degradation (LID) and Light and elevated Temperature Induced Degradation (LeTID), phenomena that can cause a permanent power loss of 1–3% in silicon-based PERC modules during the first months of operation. This ensures full rated power output from day one of system commissioning.

The life-cycle carbon footprint of Series 6 modules is approximately 15.83 gCO2eq/kWh — roughly 2.5× lower than monocrystalline silicon panels (approx. 38 gCO2eq/kWh per LCA data) and a 3× lower water footprint. Series 6 Plus and Series 7 were the first modules in the world to achieve EPEAT Climate+ certification (threshold: ≤400 kg CO2e/kWp).

The manufacturer offers a 30-year linear power warranty — one of the longest standard warranty terms in the commercial PV segment — underpinned by a declared annual degradation rate of 0.30%/year (vs. 0.45–0.55%/year for typical silicon modules). This yields an estimated 2–3% higher cumulative energy output over a 30-year project lifetime.

First Solar is the only module manufacturer in the world operating its own pre-funded collection and recycling program for end-of-life modules, active since 2005. In 2023, the global average material recovery rate reached 95%, covering glass, aluminum, steel, and semiconductor material. This eliminates the risk of toxic cadmium disposal and fully complies with the EU's most stringent environmental standards.

The efficiency range of 17.4–18.6% is materially below that of direct peer comparables: the Risen RSM96-11 achieves 23%, the SunKean SKT440–460 reaches 23.02%, and even the Zonergy ZPM MH3-72 delivers 21.16%. Achieving 1 MWp with Series 6 modules therefore requires approximately 20–25% more land area than the most efficient silicon alternatives — a significant constraint for projects with limited land availability.

The Series 6 is a monofacial module (is_bifacial: false), whereas direct competitors such as the Risen RSM96-11-440-460BNDG offer bifacial technology, enabling additional energy harvest from albedo reflectance — typically 5–15% extra yield in ground-mounted systems with high-reflectivity ground surfaces. The absence of a bifacial option in the standard series limits yield optimization on newly designed utility-scale ground-mount projects.

The 12-year product warranty falls below the rising market benchmark, with many Tier-1 manufacturers now offering 15–25 years of product warranty coverage. For long-term financed projects — including project finance structures and PPA agreements of 20+ years — this may necessitate additional risk analysis from lending institutions.