--- title: "Huayao HY665-B144DSS 665W Solar Panel - Specs & Review | ComparePV" description: "Huayao HY665-B144DSS 665W solar panel. Specs: 24.62% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/huayao-hy665-b144dss" updated: 2026-09-11 --- # Huayao HY665-B144DSS Light for its output, no clear weak spot 80 panels in the segment Back Contact 650-700 W ## Identity - **Manufacturer:** Huayao - **Model:** HY665-B144DSS - **Series:** Hyper B72 - **Rated power:** 665 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) | 665 W | 660 W | Typical | | | Module efficiency | 24.62% | 24.40% | Strong - top 19% | 42 | | Power density | 246.2 | 244.3 | Strong - top 23% | 42 | | Temperature coefficient | -0.260 | -0.260 | Typical | 511 | | Weight (kg) | 27.6 kg | 32.5 kg | Strong - top 2% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 24.62% | 24.40% | Strong - top 19% | 42 | | Power density | 246.2 | 244.3 | Strong - top 23% | 42 | | Temperature coefficient | -0.260 | -0.260 | Typical | 511 | | Weight per kWp | 41.5 | 49.7 | Strong - top 2% | 179 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **41.5 kg per kWp** - Top 2% of the Back Contact 650-700 W segment, against a median of 49.7. Ranked 179th in the whole database. - **24.62% module efficiency** - Top 19% of the Back Contact 650-700 W segment, against a median of 24.40%. - **246.2 watts per square metre** - Top 23% of the Back Contact 650-700 W segment, against a median of 244.3. - **Best for:** Utility-scale, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 665 W - **Efficiency:** 24.62 % - **Voltage at Pmax (Vmp):** 45.43 V - **Current at Pmax (Imp):** 14.64 A - **Open-circuit voltage (Voc):** 54.23 V - **Short-circuit current (Isc):** 15.34 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:** 44 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:** 27.6 kg - **Area:** 2.70 m2 - **Power density:** 246.2 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 % - **Annual degradation:** 0.35 % - **Output after 30 years:** 591 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 42 of 14005 | | Power density | 42 of 14005 | | Temperature coefficient | 511 of 14005 | | Weight | 179 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Back Contact: 23.51–24.80% efficiency** - Eliminating front-side metallization in Back Contact cells removes shading losses from busbars, enabling up to 24.80% module efficiency — +3.2 pp above Hiwatt HW-M12/132H (21.6%) and +3.23 pp above Techwise Summit and ZNShine ZXM8-TP132 (21.57%). In practice this translates to roughly 15–20 kWp more installed capacity per 1,000 m² of roof area compared to these peer comparables. - **Up to 670 Wp per module, 12 variants** - The 635–670 Wp range across 12 variants gives system designers flexibility to optimize string sizing and module count for specific roof layouts or field configurations. For large-scale installations (PV farms, warehouses, commercial rooftops), the broader power spread reduces leftover panel mismatches and simplifies MPPT selection. - **30-year linear power warranty** - The manufacturer provides a 30-year linear power warranty — longer than the 25-year standard offered by leading Tier-1 manufacturers (JA Solar, Trina, Jinko). The extended horizon improves LCOE modeling in projects with long financing periods. - **Clear technology edge over peer comparables** - Back Contact technology is among the highest-efficiency commercially available silicon cell architectures (alongside HJT). Per the ITRPV (2025 edition), BC modules are already delivering 24%+ in mass production and are on track for 26% by 2028, while the listed peer comparables in the same power class rely on older cell designs at ~21.57–21.6% efficiency. ## Cons - **Not on BNEF Tier-1 list (Q1 2026)** - Huayao does not appear on the BNEF bankable manufacturer Tier-1 list as of Q1 2026. For projects requiring bank financing or EPC insurance, this may trigger additional due diligence requirements or outright supplier disqualification — a hurdle absent when specifying JA Solar, Trina Solar, or LONGi. - **15-year product warranty — below premium standard** - The product (workmanship) warranty is 15 years, whereas leading Tier-1 manufacturers (JA Solar, Trina Solar, Jinko Solar) offer a standard 25-year product warranty. Over a typical 20–25-year investment cycle, the 10-year gap represents meaningful latent-defect coverage risk for the asset owner. - **Monofacial-only series** - Back Contact cell architecture is technically well-suited to bifacial designs (cf. AIKO ABC bifacial, Maxeon 7), yet the Hyper B72 series offers no bifacial variant. The monofacial constraint foregoes 5–20% additional annual energy yield from ground-reflected albedo, a notable loss for ground-mount systems on light gravel or flat roofs with white TPO/PVC membranes. ## About this series The Huayao Hyper B72 series are modules designed for maximum yield in large-scale installations - where high single-panel power output and efficient installation workflows matter. Variants in this family utilize large-cell formats and the **half-cut** layout, which helps minimize module losses and ensures stable operation under partial shading (e.g., from roof tiles, chimneys, or adjacent rows). In practice, this translates to more predictable energy production in real-world conditions. Available in the range are also **bifacial** versions, capable of further harnessing reflected light from the ground - a clear advantage on white membrane roofs, gravel surfaces, or elevated setups. Designed for **high reliability** and compatibility with standard design infrastructure, they simplify selection for PV farms, warehouses, industrial facilities, and large commercial roofs. The Hyper B72 series stands out with its approach of 'more energy from the same footprint' without complicating the design, setting it apart from many series focused solely on catalog parameters. ## Notable figures - At 24.6% efficiency, this panel is on par with typical \*\*Back Contact 650-700W\*\* modules - Power density of 246.2 W/m² matches the \*\*Back Contact 650-700W\*\* median - Temperature coefficient of -0.26%/°C matches the \*\*Back Contact 650-700W\*\* median - Weight of 27.6 kg (4.9 kg below \*\*Back Contact 650-700W\*\* median of 32.5 kg) allows easier transport and roof mounting - Ranked #42 out of 14005 panels for efficiency in the database ## Questions ### What is Back Contact cell technology and why does the Huayao Hyper B72 series use it? In Back Contact technology, all electrical connections (busbars) are relocated to the rear side of the cell, leaving the entire front surface active for light absorption with no metal shading. This raises module efficiency and increases energy yield per square meter of roof or ground area. In the Hyper B72 series, it translates to measurably higher power output compared with conventional PERC modules of the same rated wattage. ### What is the maximum power output of the Huayao Hyper B72 series? The top variant in the Huayao Hyper B72 series reaches 670 Wp. This wattage level targets large commercial installations, utility-scale PV farms, and industrial facilities. Higher per-panel output reduces the total module count needed for a given system capacity, simplifying wiring, lowering Balance of System (BoS) costs, and shortening installation time. ### What warranties does the Huayao Hyper B72 come with? Huayao provides a 15-year product warranty covering manufacturing defects and structural integrity, plus a 30-year linear power output warranty. The 30-year power guarantee is the commercial-grade standard and ensures the panel retains a specified percentage of its rated efficiency over that period, in accordance with the degradation curve stated in the datasheet. ### How do Huayao Hyper B72 panels handle partial shading from chimneys or parapets? The Hyper B72 combines a large-format cell design with a half-cut layout, which splits each cell in two and reduces current losses when part of the module is shaded. In practice, obstructions such as chimneys, parapets, or adjacent panel rows have a smaller impact on overall system output. The module operates more consistently and delivers more predictable energy production under real-world conditions. ### Is Huayao a Tier 1 solar manufacturer, and does it matter when buying panels? Huayao is not classified as a Tier 1 manufacturer by Bloomberg NEF rankings. It is important to note that Tier 1 status is a financial criterion related to project bankability, not a direct measure of panel technical quality. When evaluating modules, focus on available certifications (IEC 61215, IEC 61730), warranty terms, and the reputation of the local distributor who handles warranty claims. ### What types of installations is the Huayao Hyper B72 series best suited for? The Hyper B72 is designed for large-scale projects: utility-scale PV farms, warehouses, industrial buildings, and large commercial rooftops. With output up to 670 Wp and a large-format half-cut cell layout, scaling the system is straightforward — fewer modules for the same installed capacity means lower labor costs, fewer electrical connections, and simpler on-site logistics. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/hy670-b144dss-01b31047f5a0.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | -15 W, +0.6 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +15 W, heavier, +0.6 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +10 W, heavier, +0.4 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | -20 W, +0.4 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +35 W, heavier, +0.4 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +30 W, heavier, +0.3 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | Very close match | | [Huayao HY605-N132EDD](https://comparepv.com/panel/huayao-hy605-n132edd) | 605 W | -60 W, heavier, -2.2 pp | | [Huayao HY610-N132EDD](https://comparepv.com/panel/huayao-hy610-n132edd) | 610 W | -55 W, heavier, -2.0 pp | | [Huayao HY615-N132EDD](https://comparepv.com/panel/huayao-hy615-n132edd) | 615 W | -50 W, heavier, -1.9 pp | | [Huayao HY620-N132EDD](https://comparepv.com/panel/huayao-hy620-n132edd) | 620 W | -45 W, heavier, -1.7 pp | | [Huayao HY625-N132EDD](https://comparepv.com/panel/huayao-hy625-n132edd) | 625 W | -40 W, heavier, -1.5 pp | | [Huayao HSM-BD72-WC630](https://comparepv.com/panel/huayao-hsm-bd72-wc630) | 630 W | -35 W, -1.3 pp | | [Huayao HY635-B144DDD](https://comparepv.com/panel/huayao-hy635-b144ddd) | 635 W | -30 W, heavier, -1.1 pp | | [Huayao HY640-B144DDD](https://comparepv.com/panel/huayao-hy640-b144ddd) | 640 W | -25 W, heavier, -0.9 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | Very close match | --- Source: https://comparepv.com/panel/huayao-hy665-b144dss 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.