Middle of its segment, heavy for its output
This HT-SAAE HT66-210(ND)-F series was designed to maximize energy yield from every square meter of installation-especially where high production and long-term operational stability are crucial. The use of N-type TOPCon cells translates to excellent performance in real-world conditions, including low irradiance and lower power degradation sensitivity over time-a key advantage for investors planning long-term installations.
The double glass construction enhances resistance to moisture, temperature fluctuations, and mechanical stress, making the modules reliable in demanding environments. This is also a bifacial series-capable of utilizing reflected light from the ground, which helps boost energy yield in ground-mounted PV farms and ground installations. An additional benefit is module sorting based on current, which minimizes mismatch losses in series.
This is the ideal choice for C&I projects, utility-scale solar farms, and large rooftops, where predictable production and lower energy costs throughout the lifespan are essential.
Ranking
Signals from the data
Commercial, utility-scale and shaded-installations.
Weight-limited structures, tight roof space and roofs where every square metre has to count.
Bottom 2% of the TOPCon 700-750 W segment, against a median of 52.9. Ranked 9,361st in the whole database.
Bottom 5% of the TOPCon 700-750 W segment, against a median of 23.00%. Ranked 4,222nd in the whole database.
Bottom 7% of the TOPCon 700-750 W segment, against a median of 230.2. Ranked 3,989th in the whole database.
The datasheet confirms an annual power degradation rate of 0.4%/year, which is the benchmark for N-type TOPCon technology and translates to retaining >87.4% of rated power after 30 years. By comparison, the same manufacturer's P-type PERC modules guarantee only 83% after 25 years — a difference in energy yield for a 1 MWp installation of approximately 40–60 MWh/year over 30 years.
HT-SAAE offers a 30-year warranty covering both the product and power output (>87.4% after 30 years), extending beyond the market-standard 25-year warranty offered by manufacturers such as JA Solar and Trina Solar in the PERC segment. The closest direct peer, DAS Solar DAS-DH132NC, offers an equivalent 30-year warranty, confirming that this series maintains the highest standard in its segment.
A peak efficiency of 23% positions this series on par with its best direct competitors: DAS Solar DAS-DH132NC (23%) and BECSA BEC-HJT (23%), with only a marginal gap to the New East Solar NESE 66THB-G12 (23.02%). In space-constrained installations, each percentage point of efficiency translates to approximately 4.5 Wp/m² of additional power output.
HT-SAAE is listed on the BloombergNEF Tier-1 bankable manufacturer index, facilitating project financing with financial institutions. As a subsidiary of China Aerospace and Science and Technology Corporation, the company has been active in the photovoltaic industry since 1998, operates 4 manufacturing bases, and holds annual production capacity of approximately 5 GW. Tier-1 status directly reduces the risk premium when structuring financing for C&I and utility-scale projects.
The glass-glass bifacial design enables energy harvest from reflected irradiance (typically +5–15% for ground-mounted systems with high-albedo surfaces or snow cover), while the rear glass pane replaces the backsheet, significantly improving resistance to moisture ingress and mechanical stress — the module is certified for snow loads up to 5,400 Pa and wind loads up to 2,400 Pa.
The temperature coefficient of Pmax is -0.31%/°C, which is typical for TOPCon but notably weaker than the HJT technology used by the direct peer BECSA BEC-HJT (typically -0.24 to -0.26%/°C for HJT). In locations with high module operating temperatures — southern Europe, flat rooftops with poor air circulation — this difference can result in 2–4% lower annual energy yield compared to HJT modules of identical STC-rated power.
- At 22.5% efficiency, this panel is on par with typical TOPCon 700-750W modules
- 225.3 W/m² power density is 4.9 W/m² below TOPCon 700-750W median (230.2 W/m²) - requires larger installation area
- -0.31%/°C temperature coefficient - 0.02pp worse than TOPCon 700-750W median (-0.29%/°C), expect higher hot weather losses
- 74% bifaciality enables rear-side power generation, boosting yield by 4-11% on reflective surfaces
- #4222 for efficiency, #8005 for temperature performance out of 14005 panels
Specifications
Datasheet charts
Measured curves published by HT-SAAE in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 700 Wp appear here. The rest cover the whole series.
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.
Alternatives
Found 1390 panels of the same or similar size to this one, within ±10 mm. See them here Found 1400 panels of the same or similar size to this one, within ±25 mm. See them here Found 1400 panels of the same or similar size to this one, within ±50 mm. See them here Found 1432 panels of the same or similar size to this one, within ±100 mm. See them here