--- title: "HY SOLAR HY-NT12/66H-720 720W Solar Panel - Specs & Review | ComparePV" description: "HY SOLAR HY-NT12/66H-720 720W solar panel. Specs: 23.00% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/hy-solar-hy-nt12-66h-720" updated: 2026-09-11 --- # HY SOLAR HY-NT12/66H-720 Light for its output, no clear weak spot 420 panels in the segment TOPCon 700-750 W ## Identity - **Manufacturer:** HY SOLAR - **Model:** HY-NT12/66H-720 - **Series:** HY SOLAR N-Type TOPCon (multiple series/frames) - **Rated power:** 720 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 700-750 W (420 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 720 W | 715 W | Typical | | | Module efficiency | 23.00% | 23.00% | Typical | 1,919 | | Power density | 231.8 | 230.2 | Typical | 1,347 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 33.3 kg | 38.0 kg | Strong - top 11% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.00% | 23.00% | Typical | 1,919 | | Power density | 231.8 | 230.2 | Typical | 1,347 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 46.2 | 52.9 | Strong - top 11% | 1,092 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **46.2 kg per kWp** - Top 11% of the TOPCon 700-750 W segment, against a median of 52.9. - **Best for:** Commercial, utility-scale, shaded-installations and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 720 W - **Efficiency:** 23.00 % - **Voltage at Pmax (Vmp):** 40.74 V - **Current at Pmax (Imp):** 17.68 A - **Open-circuit voltage (Voc):** 49.22 V - **Short-circuit current (Isc):** 18.49 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.240 %/degC - **Temperature coefficient of Isc:** 0.043 %/degC - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 - **Bifacial:** yes ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 33 mm - **Weight:** 33.3 kg - **Area:** 3.11 m2 - **Power density:** 231.8 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 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:** 629 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1919 of 14005 | | Power density | 1347 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 1092 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Efficiency up to 23.8% — above peer group** - Peak module efficiency reaches 23.8%, while directly comparable series (Huasun Himalaya V-ocean, Phono Solar Monocrystalline132, Recom Lynx) top out at 23.5%. The 0.3 percentage-point advantage translates into higher power density for the same roof or ground area. - **Low temperature coefficient of -0.29%/°C** - A temperature coefficient of -0.29%/°C compares favorably to typical PERC modules (-0.34% to -0.37%/°C) and is on par with leading N-type TOPCon products on the market. In real-world conditions where module temperatures can reach 65–70°C during summer, the difference yields measurably higher daily energy output at peak season. - **Bifaciality of 80–85% — effective bifacial performance** - A bifaciality factor of 80–85% enables efficient harvesting of reflected albedo in ground-mounted farms and agrivoltaic systems. On high-albedo surfaces (albedo >20%), installations can expect an additional 5–12% energy yield compared to standard monofacial modules. - **30-year power warranty, degradation ≤0.4%/year** - The manufacturer guarantees ≥87.40% of rated power output after 30 years, with annual degradation ≤0.4% (≤1% in year one). This aligns with best-in-class TOPCon market standards and gives investors confidence in long-term financial models without applying an accelerated degradation discount. - **Broad lineup — 86 variants, 445–730 Wp** - Availability of 86 power variants ranging from 445 to 730 Wp allows module selection across a wide range of project formats — from BIPV applications and small industrial rooftops to large utility-scale ground-mounted farms — without switching manufacturers within a project portfolio. ## Cons - **No BNEF Tier-1 status (non-bankable)** - HY SOLAR does not appear on the BloombergNEF Tier-1 list (Q1 2026), meaning it lacks confirmed bankability in the context of non-recourse project financing. For bank-financed commercial and industrial projects, this may require additional product insurance or escrow arrangements that Tier-1 manufacturers — such as peer competitor Phono Solar — do not necessitate. ## About this series The HY SOLAR N-Type TOPCon series (available in various configurations and frame options) is designed for real-world operating conditions, where stable performance, predictability, and energy loss resistance are paramount. A key advantage is the use of **N-Type TOPCon** cell technology, which supports high efficiency over the long term and helps to minimize performance degradation typical of older solutions. Many variants feature a **bifacial** design, allowing the module to also utilize reflected light from the ground, which improves energy production in PV farms, ground-mounted systems, and PV+ projects. The use of **SMBB** and **half-cut cell** technology also enhances current flow within the module and improves performance under partial shading. The manufacturer also highlights **improved performance in low-light conditions** and the beneficial impact of a lower temperature coefficient on energy yield in hot weather. This series is ideal for investors who want to combine high power density with practical reliability in commercial and industrial projects. ## Notable figures - At 23.0% efficiency, this panel is on par with typical \*\*TOPCon 700-750W\*\* modules - At 231.8 W/m² power density, roof space requirements are typical for \*\*TOPCon 700-750W\*\* panels - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 700-750W\*\* median - At 33.3 kg, this panel is 4.7 kg lighter than \*\*TOPCon 700-750W\*\* median (38.0 kg) - easier handling during installation - In the top 14% for efficiency among all TOPCon panels ## Questions ### What is the warranty on HY SOLAR N-Type TOPCon series panels? The manufacturer provides a 15-year product warranty covering material and workmanship defects, along with a 30-year linear power output warranty. This means the panel is guaranteed to retain a specified percentage of its rated output for three decades. This warranty structure is standard for commercial and industrial-grade modules and is an important input when calculating the overall system LCOE. ### How does TOPCon technology differ from older PERC cells, and is it worth the premium? TOPCon (Tunnel Oxide Passivated Contact) uses N-type silicon with a thin tunnel oxide layer that reduces carrier recombination and enables higher cell efficiency than PERC. N-type cells also exhibit lower LID (Light Induced Degradation), meaning less power loss in the first months of operation. In the HY SOLAR TOPCon series this translates to up to 730 Wp peak output and better long-term energy yield. ### Does bifacial design on HY SOLAR TOPCon panels actually boost energy production, and under what conditions? Yes, the bifacial design harvests albedo light reflected from the ground surface. On ground-mounted utility-scale plants with light-colored gravel, white EPDM membranes, or snow cover, rear-side generation typically adds 5–15% compared to a monofacial module. The gain is minimal on dark rooftops, so bifacial performance is most valuable in utility-scale, solar tracker, and PV+ project configurations. ### How does the HY SOLAR TOPCon series perform under partial shading from a chimney or nearby tree? The combination of half-cut cell technology and SMBB (Super Multi-Busbar) splits the module into two independent electrical circuits. Shading one half of the panel affects only that section's output rather than the entire module, as would happen with a standard full-cell design. This makes the series a practical choice for rooftops or sites where full unobstructed irradiance throughout the day is not guaranteed. ### Do HY SOLAR TOPCon panels maintain efficiency during hot weather, or does heat reduce their output significantly? N-type TOPCon technology offers a more favorable temperature coefficient than conventional PERC modules, resulting in less power loss as cell temperature rises. On hot summer days, a TOPCon panel will deliver more energy than a same-rated PERC module under identical conditions. This advantage is especially relevant for commercial and industrial installations in warmer European climates or on poorly ventilated surfaces. ### Is HY SOLAR a Tier 1 manufacturer, and what does that mean for the warranty? HY SOLAR is not currently listed as a Tier 1 manufacturer by BloombergNEF, which does not automatically indicate poor product quality but does introduce additional counterparty risk on warranty claims. Before purchasing, verify that the specific model holds IEC 61215 and IEC 61730 certification, confirm that an authorized service partner is available in your country, and review the distributor's warranty fulfillment terms in detail. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/hy-solar-pv-modules-product-handbook-en-v-2505-1-b5c611139de0.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | -40 W, lighter, +2.2 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | -45 W, lighter, +2.0 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | -20 W, cooler, +2.0 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | -25 W, cooler, +1.9 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | -50 W, lighter, +1.8 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | -50 W, lighter, +1.8 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | -50 W, cooler, +1.8 pp | | [HY SOLAR HY-NT12/66GDF-705](https://comparepv.com/panel/hy-solar-hy-nt12-66gdf-705) | 705 W | -15 W, heavier, -0.3 pp | | [HY SOLAR HY-NT12/66H-710](https://comparepv.com/panel/hy-solar-hy-nt12-66h-710) | 710 W | -10 W, -0.3 pp | | [HY SOLAR HY-NT12/66H-715](https://comparepv.com/panel/hy-solar-hy-nt12-66h-715) | 715 W | Very close match | | [HY SOLAR HY-NT12/66H-725](https://comparepv.com/panel/hy-solar-hy-nt12-66h-725) | 725 W | Very close match | | [HY SOLAR HY-NT12/66H-730](https://comparepv.com/panel/hy-solar-hy-nt12-66h-730) | 730 W | +10 W, +0.5 pp | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +85 W, heavier, +2.1 pp | | [AIKO AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 W | +80 W, heavier, +1.9 pp | | [AIKO AIKO-A795-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a795-grh78dw) | 795 W | +75 W, heavier, +1.8 pp | | [AIKO AIKO-A790-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a790-grh78dw) | 790 W | +70 W, heavier, +1.6 pp | --- Source: https://comparepv.com/panel/hy-solar-hy-nt12-66h-720 Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.