--- title: "HT-SAAE HT66-210(ND)-F 695W 695W Solar Panel - Specs & Review | ComparePV" description: "HT-SAAE HT66-210(ND)-F 695W 695W solar panel. Specs: 22.40% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/ht-saae-ht66-210-nd-f-695w" updated: 2026-09-11 --- # HT-SAAE HT66-210(ND)-F 695W Middle of its segment, weak in heat 249 panels in the segment TOPCon 650-700 W ## Identity - **Manufacturer:** HT-SAAE - **Model:** HT66-210(ND)-F 695W - **Series:** HT66-210(ND)-F - **Rated power:** 695 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 650-700 W (249 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 695 W | 665 W | Strong - top 8% | | | Module efficiency | 22.40% | 22.40% | Typical | 4,774 | | Power density | 223.7 | 223.7 | Typical | 4,877 | | Temperature coefficient | -0.310 | -0.290 | Weak - bottom 13% | 8,005 | | Weight (kg) | 38.5 kg | 34.6 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.40% | 22.40% | Typical | 4,774 | | Power density | 223.7 | 223.7 | Typical | 4,877 | | Temperature coefficient | -0.310 | -0.290 | Weak - bottom 13% | 8,005 | | Weight per kWp | 55.4 | 53.2 | Typical | 9,818 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.310 %/°C temperature coefficient** - Bottom 13% of the TOPCon 650-700 W segment, against a median of -0.290. - **Best for:** Commercial, utility-scale and shaded-installations. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 695 W - **Efficiency:** 22.40 % - **Voltage at Pmax (Vmp):** 40.70 V - **Current at Pmax (Imp):** 17.08 A - **Open-circuit voltage (Voc):** 47.60 V - **Short-circuit current (Isc):** 18.33 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.310 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 132 - **Bifacial:** yes ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 35 mm - **Weight:** 38.5 kg - **Area:** 3.11 m2 - **Power density:** 223.7 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 607 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 4774 of 14005 | | Power density | 4877 of 14005 | | Temperature coefficient | 8005 of 14005 | | Weight | 9818 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Low N-type TOPCon Degradation: 0.4%/year** - 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. - **30-Year Product and Linear Power Warranty** - 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. - **Up to 23% Efficiency — Segment Leader in the 700W+ Class** - 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. - **BNEF Tier-1 Manufacturer — Established Bankability** - 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. - **Bifacial Double-Glass Construction** - 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. ## Cons - **Temperature Coefficient Inferior to HJT** - 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. ## About this series 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. ## Notable figures - At 22.4% efficiency, this panel is on par with typical \*\*TOPCon 650-700W\*\* modules - Power density of 223.7 W/m² matches the \*\*TOPCon 650-700W\*\* median - Temperature coefficient of -0.31%/°C is 0.02pp worse than \*\*TOPCon 650-700W\*\* median (-0.29%/°C) - higher losses in summer heat - Weight of 38.5 kg is 3.9 kg above \*\*TOPCon 650-700W\*\* median (34.6 kg) - verify structural support - Bifaciality factor of 74% can add 4-11% extra yield with reflective mounting surface ## Questions ### What warranty does the HT-SAAE HT66-210(ND)-F series come with? The HT66-210(ND)-F series carries a 30-year product warranty and a 30-year power output warranty. After 30 years of operation, the module retains at least 87% of its nominal rated power. This is among the longest warranty periods currently available on the market, backed by the durability of N-type TOPCon cells and a double glass construction. ### What is N-type TOPCon technology, and how does it compare to PERC in the HT66-210(ND)-F? N-type TOPCon technology delivers lower long-term power degradation and better performance under low-irradiance conditions than conventional PERC cells. The HT66-210(ND)-F reaches up to 715 Wp with up to 23% efficiency, while its temperature coefficient of just -0.31%/°C limits output loss on hot days. A minimum of 87% nominal power is guaranteed after 30 years. ### Does the bifacial design of the HT66-210(ND)-F actually increase energy yield, and in what installations? Yes, the bifacial cells in the HT66-210(ND)-F series capture light reflected from the surface below via the rear side of the module. The bifacial gain is greatest in ground-mount solar farms with high-albedo substrates such as white TPO membranes, light gravel, or snow. On a typical sloped rooftop the gain is smaller but still measurable with light-colored roofing materials and steeper tilt angles. ### Are HT66-210(ND)-F modules suitable for large commercial and utility-scale PV projects? Yes, the HT66-210(ND)-F series is designed for C&I and utility-scale PV applications. Output of up to 715 Wp per module reduces the total module count and installation time. Current-sorted binning minimizes mismatch losses within strings, while the double glass construction provides mechanical load resistance and moisture protection in demanding environments. ### How does the HT66-210(ND)-F series perform in winter and overcast conditions in temperate climates? N-type TOPCon cells have a low temperature coefficient (-0.31%/°C) and respond well to diffuse irradiance. As a result, HT66-210(ND)-F modules continue generating power during weak winter sunlight and overcast weather, delivering higher annual energy yield compared to PERC technology in Central European climatic conditions. ### What does the double glass construction offer in HT66-210(ND)-F modules, and does it affect installation? The dual-glass design replaces the rear backsheet with a glass panel, significantly improving resistance to moisture ingress, scratching, and mechanical loads from snow and wind. At approximately 38.5 kg per module, HT66-210(ND)-F requires an appropriately rated racking structure and at least two installers to handle safely. In return, the investor gets a module built for decades of operation in demanding conditions. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/ht72-1210nd-f-700-au-52847da11a48.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +2.8 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | Cooler, lighter, +2.8 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | Cooler, lighter, +2.6 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | -50 W, lighter, +2.6 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | Cooler, lighter, +2.6 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | Cooler, lighter, +2.5 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | Cooler, lighter, +2.4 pp | | [HT-SAAE HT66-210(ND)-F 700W](https://comparepv.com/panel/ht-saae-ht66-210-nd-f-700w) | 700 W | Very close match | | [HT-SAAE HT66-210(ND)-F 705W](https://comparepv.com/panel/ht-saae-ht66-210-nd-f-705w) | 705 W | +10 W, +0.3 pp | | [HT-SAAE HT66-210(ND)-F 710W](https://comparepv.com/panel/ht-saae-ht66-210-nd-f-710w) | 710 W | +15 W, +0.5 pp | | [HT-SAAE HT66-210(ND)-F 715W](https://comparepv.com/panel/ht-saae-ht66-210-nd-f-715w) | 715 W | +20 W, +0.6 pp | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +110 W, cooler, +2.7 pp | | [AIKO AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 W | +105 W, cooler, +2.5 pp | | [AIKO AIKO-A795-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a795-grh78dw) | 795 W | +100 W, cooler, +2.4 pp | | [AIKO AIKO-A790-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a790-grh78dw) | 790 W | +95 W, cooler, +2.2 pp | | [Trina Solar TSM-NEG21C.20Q-760](https://comparepv.com/panel/trina-solar-tsm-neg21c-20q-760) | 760 W | +65 W, cooler, +2.1 pp | --- Source: https://comparepv.com/panel/ht-saae-ht66-210-nd-f-695w Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.