--- title: "Huayao HSM-BD72-WC660 660W Solar Panel - Specs & Review | ComparePV" description: "Huayao HSM-BD72-WC660 660W solar panel. Specs: 24.40% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/huayao-hsm-bd72-wc660" updated: 2026-09-11 --- # Huayao HSM-BD72-WC660 Light for its output, no clear weak spot 80 panels in the segment Back Contact 650-700 W ## Identity - **Manufacturer:** Huayao - **Model:** HSM-BD72-WC660 - **Series:** G11RA-72P (HSM-BD72-WC630~660) - **Rated power:** 660 W - **Cell technology:** Back Contact ## How it compares Compared against segment Back Contact 650-700 W (80 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 660 W | 660 W | Typical | | | Module efficiency | 24.40% | 24.40% | Typical | 99 | | Power density | 244.3 | 244.3 | Typical | 88 | | Temperature coefficient | -0.260 | -0.260 | Typical | 511 | | Weight (kg) | 28.1 kg | 32.5 kg | Strong - top 13% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 24.40% | 24.40% | Typical | 99 | | Power density | 244.3 | 244.3 | Typical | 88 | | Temperature coefficient | -0.260 | -0.260 | Typical | 511 | | Weight per kWp | 42.6 | 49.7 | Strong - top 13% | 229 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **42.6 kg per kWp** - Top 13% of the Back Contact 650-700 W segment, against a median of 49.7. - **Best for:** Commercial and utility-scale. ## Specification ### Electrical - **Rated power (Pmax):** 660 W - **Efficiency:** 24.40 % - **Voltage at Pmax (Vmp):** 45.30 V - **Current at Pmax (Imp):** 14.57 A - **Open-circuit voltage (Voc):** 54.60 V - **Short-circuit current (Isc):** 15.24 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.260 %/degC - **Temperature coefficient of Voc:** -0.220 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** Back Contact - **Cell count:** 144 ### Physical - **Length:** 2382 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 28.1 kg - **Area:** 2.70 m2 - **Power density:** 244.3 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 88.8 % - **First-year degradation:** 1.00 % - **Output after 30 years:** 586 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 99 of 14005 | | Power density | 88 of 14005 | | Temperature coefficient | 511 of 14005 | | Weight | 229 of 14005 | | Warranty | 21 of 14005 | ## Pros - **No busbar shading losses (Back Contact)** - The Back Contact architecture moves all metallization to the rear side of the cell, eliminating the 2–4% shading losses typical of busbar-based designs. The result is peak module efficiency of up to 24.4% — on par with direct competitors Longi Hi-MO 9 (LR7-72HYD) and Canadian Solar TOPBiHiKu6, both at 660 Wp max and 24.4%, while maintaining monofacial system simplicity. - **Glass-glass (dual-glass) construction** - The dual-glass laminate removes the backsheet as a moisture ingress pathway, reducing PID degradation and EVA hydrolysis risk. In climates with frequent freeze-thaw cycles and high humidity, this translates to an annual degradation rate typically below 0.45%/yr vs ~0.55%/yr for glass-backsheet variants, supporting stronger long-term energy yield. - **30-year linear power warranty** - The manufacturer provides a 30-year linear power output warranty — the same horizon as Longi Hi-MO 9 and Canadian Solar TOPBiHiKu6. For utility-scale and commercial PV projects with typical 20–25 year financing tenors, this ensures full warranty coverage throughout the entire debt repayment cycle. - **Up to 660 Wp per module — lower BoS costs** - Seven variants in the 630–660 Wp range enable precise MPPT string optimization. At 660 Wp versus previous-generation 400–500 Wp modules, the same-capacity plant requires approximately 35–40% fewer modules, directly reducing racking, cabling, and labor costs and improving overall LCOE. ## Cons - **Monofacial design vs. bifacial competitors** - The series is monofacial (is\_bifacial: false), forfeiting the 5–20% additional energy yield from reflected irradiance available in ground-mount and flat-roof installations with light-colored surfaces. Both direct competitors — Longi Hi-MO 9 (LR7-72HYD) and Canadian Solar TOPBiHiKu6 — deliver bifacial gain at the same 660 Wp max power and 24.4% efficiency, resulting in a measurable annual yield advantage in typical ground-mount conditions (albedo ~0.25). - **Not on BNEF Tier-1 Bankable list** - Huayao PV does not appear on the BNEF bankable module manufacturer list (Q1 2026). Commercial banks and infrastructure funds financing projects above 1 MW typically require Tier-1 status as a baseline underwriting condition. This may extend project due diligence timelines or necessitate additional contractual risk mitigations in EPC agreements. - **15-year product warranty vs. 25-year Tier-1 standard** - The workmanship warranty covers only 15 years, compared to the 25-year standard offered by Longi Solar and Canadian Solar. The 10-year gap in coverage against manufacturing defects — including delamination, cell micro-cracking, and bypass diode failure — is material for projects with a 25–30 year operational horizon and may affect insurance pricing and project risk valuation. ## About this series The Huayao G11RA-72P (HSM-BD72-WC630~660) series are modules designed for installations where high power output from a given area and stable performance over many years are crucial. A key advantage is the **glass-glass construction**, which effectively reduces the risk of degradation caused by moisture, UV radiation, and fluctuating temperatures - particularly important in the Polish climate. The use of a **bifacial architecture** allows for the utilization of light reflected from the ground, which helps to increase energy production on ground, flat roofs, and carport structures. The series also utilizes solutions that minimize losses under partial shading, making the installation more predictable in real-world conditions. Furthermore, the reinforced construction and resistance to typical environmental loads support lower maintenance costs and greater peace of mind for the investor. This is a good choice for PV farms, large commercial buildings, and projects where **long-term reliability** and **improved system profitability** are the top priorities. ## Notable figures - Efficiency of 24.4% matches the \*\*Back Contact 650-700W\*\* median - At 244.3 W/m² power density, roof space requirements are typical for \*\*Back Contact 650-700W\*\* panels - At -0.26%/°C, hot weather performance is typical for \*\*Back Contact 650-700W\*\* panels - Weight of 28.1 kg (4.4 kg below \*\*Back Contact 650-700W\*\* median of 32.5 kg) allows easier transport and roof mounting - Ranked #99 out of 14005 panels for efficiency in the database ## Questions ### What warranty does the Huayao G11RA-72P series come with? The G11RA-72P series includes a 15-year product warranty covering material and manufacturing defects, plus a 30-year linear power output warranty. This means the module is guaranteed to maintain a specified minimum power level for three decades. Such a long power warranty is a key factor when calculating ROI for commercial installations and utility-scale PV plants. ### What is Back Contact cell technology in the Huayao G11RA-72P and what are its advantages? Back Contact technology moves all metallic electrical contacts to the rear side of the cell. This leaves the entire front surface active — no shading from busbars or fingers — which improves light absorption and results in higher module efficiency. In practice, you get more energy from the same roof or ground area compared to conventional front-contact cell designs. ### Is the Huayao G11RA-72P series suitable for large commercial installations and utility-scale PV plants? Yes, the G11RA-72P series is designed primarily for large commercial rooftops and ground-mounted PV plants. With a peak power of up to 660 Wp, fewer modules are required for a given system capacity, reducing BoS costs such as cabling, connectors, and racking. The dual-glass construction and 30-year power warranty further support the long-term profitability of such projects. ### Why do the Huayao G11RA-72P panels use glass-glass construction, and does it matter in Central European climates? Glass-glass construction replaces the rear backsheet with a second tempered glass layer, dramatically reducing moisture ingress into the module. In climates with significant temperature swings and rainfall throughout the year, this lowers the risk of microcracks, delamination, and accelerated PID degradation. The result is a slower long-term power decline and reduced maintenance costs over the system's lifetime. ### How does the 660 Wp rating of the Huayao G11RA-72P affect the number of modules needed for an installation? At 660 Wp, a 100 kWp system requires approximately 152 modules, compared to over 250 modules with standard 400 Wp panels. Fewer modules mean less DC cabling, fewer MC4 connectors, and fewer mounting brackets, which significantly reduces both material costs and installation time for large-scale projects. ### Do the Huayao G11RA-72P panels perform well under variable cloud cover and partial shading? The G11RA-72P series incorporates features that reduce losses under partial shading conditions, making the installation more predictable when transient clouds or structural shadows are present. For persistent, heavy shading, adding power optimizers or microinverters is always recommended regardless of the module series used. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/68ff57ed8ce7d53b4b1bb11a_TCL-BC-630660-72-Wht-SG-Com-d8417e75ecca.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | -10 W, lighter, +0.8 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +20 W, +0.8 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +15 W, +0.6 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | -15 W, lighter, +0.6 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +40 W, heavier, +0.6 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +35 W, heavier, +0.5 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +10 W, +0.4 pp | | [Huayao HY605-N132EDD](https://comparepv.com/panel/huayao-hy605-n132edd) | 605 W | -55 W, heavier, -2.0 pp | | [Huayao HY610-N132EDD](https://comparepv.com/panel/huayao-hy610-n132edd) | 610 W | -50 W, heavier, -1.8 pp | | [Huayao HY615-N132EDD](https://comparepv.com/panel/huayao-hy615-n132edd) | 615 W | -45 W, heavier, -1.6 pp | | [Huayao HY620-N132EDD](https://comparepv.com/panel/huayao-hy620-n132edd) | 620 W | -40 W, heavier, -1.4 pp | | [Huayao HY625-N132EDD](https://comparepv.com/panel/huayao-hy625-n132edd) | 625 W | Hotter, heavier, -1.3 pp | | [Huayao HSM-BD72-WC630](https://comparepv.com/panel/huayao-hsm-bd72-wc630) | 630 W | -30 W, -1.1 pp | | [Huayao HY635-B144DDD](https://comparepv.com/panel/huayao-hy635-b144ddd) | 635 W | -25 W, heavier, -0.9 pp | | [Huayao HY640-B144DDD](https://comparepv.com/panel/huayao-hy640-b144ddd) | 640 W | -20 W, heavier, -0.7 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +10 W, +0.4 pp | --- Source: https://comparepv.com/panel/huayao-hsm-bd72-wc660 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.