--- title: "Hounen Solar HNM7-SHLDD156-610/M 610W Solar Panel - Specs & Review | ComparePV" description: "Hounen Solar HNM7-SHLDD156-610/M 610W solar panel. Specs: 21.82% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/hounen-solar-hnm7-shldd156-610-m" updated: 2026-09-11 --- # Hounen Solar HNM7-SHLDD156-610/M Middle of its segment, weak in heat 6,057 panels in the 510-710 W band, all technologies ## Identity - **Manufacturer:** Hounen Solar - **Model:** HNM7-SHLDD156-610/M - **Series:** HNM7-SHLDD156 - **Rated power:** 610 W - **Cell technology:** Monocrystalline - **Bifacial:** yes ## How it compares Compared against 510-710 W band, all technologies (6057 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 610 W | 595 W | Typical | | | Module efficiency | 21.82% | 22.26% | Typical | 7,000 | | Power density | 218.2 | 222.6 | Typical | 6,971 | | Temperature coefficient | -0.350 | -0.300 | Weak - bottom 11% | 10,419 | | Weight (kg) | 34.5 kg | 32.0 kg | Weak - bottom 18% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.82% | 22.26% | Typical | 7,000 | | Power density | 218.2 | 222.6 | Typical | 6,971 | | Temperature coefficient | -0.350 | -0.300 | Weak - bottom 11% | 10,419 | | Weight per kWp | 56.6 | 53.0 | Weak - bottom 18% | 10,713 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.350 %/°C temperature coefficient** - Bottom 11% of the 510-710 W band, against a median of -0.300. - **56.6 kg per kWp** - Bottom 18% of the 510-710 W band, against a median of 53.0. - **Best for:** Commercial, utility-scale and shaded-installations. - **Not ideal for:** Hot climates and weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 610 W - **Efficiency:** 21.82 % - **Voltage at Pmax (Vmp):** 45.90 V - **Current at Pmax (Imp):** 13.29 A - **Open-circuit voltage (Voc):** 54.20 V - **Short-circuit current (Isc):** 14.03 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.350 %/degC - **Temperature coefficient of Voc:** -0.290 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 44 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell count:** 156 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 2465 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 34.5 kg - **Area:** 2.80 m2 - **Power density:** 218.2 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 84.8 % - **First-year degradation:** 1.00 % - **Output after 30 years:** 517 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7000 of 14005 | | Power density | 6971 of 14005 | | Temperature coefficient | 10419 of 14005 | | Weight | 10713 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Up to 25% extra bifacial gain** - The dual-glass bifacial construction recovers additional energy reflected off the ground - the manufacturer claims up to 25% extra rear-side yield under favorable albedo conditions, a notable advantage for installations on light-colored roofs, gravel, or grass. - **30-year linear power warranty** - The 30-year power warranty exceeds the standard 25-year term offered by most Tier-1 manufacturers, improving long-term energy yield predictability and lowering the effective LCOE over the project lifetime. - **MBB/10BB technology reduces resistive losses** - The multi-busbar (10BB) grid shortens the current path to the collecting busbars, reducing resistive losses within the cell and translating into higher energy yield without increasing panel footprint - useful where roof area is limited. - **PID resistance and strong low-light performance** - Claimed PID (potential-induced degradation) resistance combined with stable low-irradiance performance limits output losses on cloudy, foggy, or early-morning days, unlike cheaper modules lacking this certification. - **Competitive efficiency for PERC bifacial class** - The 21.82% maximum efficiency places the series close to comparable PERC/older-generation N-type models, such as Techwise Solar Summit Series (21.55%) and GCL-M12/60GDF (21.6%), while reaching up to 610 Wp. ## Cons - **P-type cells instead of N-type/TOPCon** - The series is built on older P-type monocrystalline cell technology, while the competing Renewsys DESERV Extreme (N-type TOPCon) reaches 23.64% efficiency - roughly 8% relatively higher than HNM7-SHLDD156's maximum 21.82%. P-type cells also typically carry higher susceptibility to LID/LeTID degradation than N-type. - **No confirmed BNEF Tier 1 status** - Available sources found no confirmation that Hounen Solar appears on the BloombergNEF Tier 1 manufacturer list, which for some institutional investors and project-finance banks can be a limiting factor for bankability compared to established Tier-1 producers. ## About this series The HNM7-SHLDD156 series is a solar module that combines P-type monocrystalline **half-cut** cells with a double-glass, **bifacial** structure, allowing an array to recover additional energy reflected from the ground instead of losing it outright. The use of **multi-busbar (MBB/10BB) technology** shortens the current path to the collecting grid, translating into higher energy yield without increasing the panel footprint - a solution for installers looking to fit more power onto the same roof or ground-mount area. The panel also stands out for its **PID resistance** and stable performance in low-light conditions, which matters during overcast weather, haze, or early morning hours - situations where cheaper modules lose considerably more output. Tempered double glass with an anti-reflective coating ensures durability in harsh environments - salty air, humidity, high temperatures, or dust - making the series attractive for coastal, agricultural, and industrial projects. The manufacturer backs this quality with a long, **linear power warranty**, increasing the security of the investment and lowering the effective cost of energy over the system's full operating lifetime. ## Notable figures - Efficiency of 21.8% matches the \*\*database\*\* median - Power density of 218.2 W/m² matches the \*\*database\*\* median - Temperature coefficient of -0.35%/°C is 0.05pp worse than \*\*database\*\* median (-0.30%/°C) - higher losses in summer heat - At 34.5 kg, this panel is 8.0 kg heavier than the \*\*database\*\* median (26.5 kg) - more demanding for installation crews - Bifaciality factor of 70% can add 4-10% extra yield with reflective mounting surface ## Questions ### What is the bifacial technology in the HNM7-SHLDD156 panels and how much extra energy does it provide? The panel uses a dual-glass bifacial design, allowing the rear side of the cells to capture light reflected from the surface below - roof, ground, or a bright surrounding surface. This means additional energy yield without increasing the installation's footprint, especially noticeable over light-colored ground, near water, or on ground-mounted arrays with reflective terrain. ### What warranty comes with the HNM7-SHLDD156 modules and what does it cover? Hounen Solar provides a 12-year product warranty along with a 30-year linear power warranty. The product warranty covers material and workmanship defects, while the power warranty guarantees a minimum performance level over the panel's lifetime, ensuring predictable energy costs across the long-term investment horizon. ### What benefits does half-cut and multi-busbar (MBB/10BB) technology bring to this series? Half-cut cells are split in half, reducing resistive losses and improving shading tolerance, for example from chimneys or antennas. The 10-busbar design shortens the current path to the collecting grid, further cutting resistive losses. Together these technologies increase real-world energy yield without enlarging the panel's surface area. ### Are the HNM7-SHLDD156 panels suitable for coastal and industrial installations? Yes, thanks to the dual tempered glass with anti-reflective coating, the panel withstands salty air, humidity, high temperatures, and dust well. This makes the series suitable for coastal solar farms, agri-PV projects, and industrial sites exposed to harsher environmental conditions. ### Does the 610 W HNM7-SHLDD156 panel perform well in low-light conditions, such as winter or cloudy days? Yes, the module maintains stable performance under low irradiance, which matters during cloudy weather, fog, early morning hours, and shorter winter days. In these conditions cheaper panels lose significantly more power, while the HNM7-SHLDD156 retains higher efficiency, resulting in more consistent energy yield throughout the year. ### Are the HNM7-SHLDD156 panels resistant to PID degradation? Yes, the series is certified for resistance to potential-induced degradation (PID). This means that in large installations with high system voltage, the module does not suffer significant power loss due to PID, protecting the declared performance throughout the entire power warranty period. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/1767944415574762-799bef7d3502.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +3.4 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +3.2 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +3.0 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, lighter, +3.0 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | Cooler, lighter, +2.8 pp | | [Longi Solar LR8-66HVD-660M](https://comparepv.com/panel/longi-lr8-66hvd-660m) | 660 W | +50 W, cooler, +2.6 pp | | [Hounen Solar HNM7-SHLDD156-585/M](https://comparepv.com/panel/hounen-solar-hnm7-shldd156-585-m) | 585 W | -25 W, -0.9 pp | | [Hounen Solar HNM7-SHLDD156-590/M](https://comparepv.com/panel/hounen-solar-hnm7-shldd156-590-m) | 590 W | -20 W, -0.7 pp | | [Hounen Solar HNM7-SHLDD156-595/M](https://comparepv.com/panel/hounen-solar-hnm7-shldd156-595-m) | 595 W | -15 W, -0.5 pp | | [Hounen Solar HNM7-SHLDD156-600/M](https://comparepv.com/panel/hounen-solar-hnm7-shldd156-600-m) | 600 W | -10 W, -0.4 pp | | [Hounen Solar HNM7-SHLDD156-605/M](https://comparepv.com/panel/hounen-solar-hnm7-shldd156-605-m) | 605 W | Very close match | | [Hounen Solar HNM7-UHLDD156-615/M](https://comparepv.com/panel/hounen-solar-hnm7-uhldd156-615-m) | 615 W | Cooler | | [Hounen Solar HNM7-UHLDD156-620/M](https://comparepv.com/panel/hounen-solar-hnm7-uhldd156-620-m) | 620 W | +10 W, cooler, +0.4 pp | | [Hounen Solar HNM7-UHLDD156-625/M](https://comparepv.com/panel/hounen-solar-hnm7-uhldd156-625-m) | 625 W | +15 W, cooler, +0.5 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +70 W, cooler, +3.4 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +65 W, cooler, +3.2 pp | --- Source: https://comparepv.com/panel/hounen-solar-hnm7-shldd156-610-m Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.