--- title: "Hanersun HN21-40H405W 405W Solar Panel - Specs & Review | ComparePV" description: "Hanersun HN21-40H405W 405W solar panel. Specs: 21.07% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/hanersun-hn21-40h405w" updated: 2026-09-11 --- # Hanersun HN21-40H405W Space saver, no clear weak spot 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** Hanersun - **Model:** HN21-40H405W - **Series:** Hitouch 6 (HN21-40H) - **Rated power:** 405 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 400-450 W (954 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 405 W | 410 W | Typical | | | Module efficiency | 21.07% | 20.60% | Strong - top 18% | 9,614 | | Power density | 210.7 | 206.2 | Strong - top 18% | 9,565 | | Temperature coefficient | -0.340 | -0.350 | Strong - top 24% | 8,778 | | Weight (kg) | 21.0 kg | 22.0 kg | Typical | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.07% | 20.60% | Strong - top 18% | 9,614 | | Power density | 210.7 | 206.2 | Strong - top 18% | 9,565 | | Temperature coefficient | -0.340 | -0.350 | Strong - top 24% | 8,778 | | Weight per kWp | 51.9 | 53.0 | Typical | 5,230 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Strengths - **210.7 watts per square metre** - Top 18% of the PERC 400-450 W segment, against a median of 206.2. - **21.07% module efficiency** - Top 18% of the PERC 400-450 W segment, against a median of 20.60%. - **-0.340 %/°C temperature coefficient** - Top 24% of the PERC 400-450 W segment, against a median of -0.350. - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 405 W - **Efficiency:** 21.07 % - **Voltage at Pmax (Vmp):** 23.20 V - **Current at Pmax (Imp):** 17.46 A - **Open-circuit voltage (Voc):** 27.70 V - **Short-circuit current (Isc):** 18.58 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 80 ### Physical - **Length:** 1754 mm - **Width:** 1096 mm - **Thickness:** 30 mm - **Weight:** 21.0 kg - **Area:** 1.92 m2 - **Power density:** 210.7 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 84.8 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.55 % - **Output after 30 years:** 332 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 9614 of 14005 | | Power density | 9565 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 5230 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Peak efficiency of 21.07% above peer comparables** - The top variant in the series (405 Wp) achieves a module efficiency of 21.07% — higher than all three comparable series: Goldi Solar GS10-M108-BF (20.66%), EGing PV STAR SERIES (20.74%), and VSUN405-108BMH-DG (20.74%). This translates into a tangible advantage on roof space-constrained installations. - **Half-cut cells + SMBB with 0.5 mm dense layout** - The half-cut cell architecture combined with super multi-busbar (SMBB) interconnection and high-density lamination (~0.5 mm inter-cell spacing) reduces internal resistance and minimizes power losses under partial shading. Hanersun claims an approximately 2% module power gain compared to conventional 5-busbar designs. - **25-year linear power output warranty** - The 25-year linear power warranty aligns with the segment standard at the time of launch (2021) and gives system owners predictable energy yield across the full intended investment payback horizon. - **Proven PERC technology — low maintenance risk** - Monocrystalline PERC cells represent a mature, well-documented technology with an extensive field degradation dataset. This simplifies risk assessment and facilitates O&M activities throughout the warranty period. ## Cons - **Series discontinued (EOL 2023)** - Production ended in 2023. This limits the availability of replacement modules for system expansions and repairs, precludes certification updates, and may create power-matching challenges in future capacity additions. - **No BNEF Tier 1 status for this product line** - For nearly the entire commercial lifecycle of the series (2021–2023), Hanersun did not appear on the BNEF Tier 1 list. Tier 1 status was achieved only in Q2 2023, and exclusively for the 600 W+ line (HItouch 6N/TOPCon) — not for the HN21-40H. This may complicate project acceptance under financing structures or lease agreements that require manufacturer bankability. - **P-type PERC technology — previous generation** - PERC cells exhibit higher light-induced degradation (LID/LeTID) rates than N-type TOPCon, which has dominated the market offering in this power class since 2024. For systems commissioned today, the HN21-40H represents technology one generation behind current alternatives. ## About this series The Hanersun Hitouch 6 (HN21-40H) series are modules designed for high efficiency on limited roof space - without compromising on durability. This line uses **monocrystalline PERC cells**, which perform well in real-world conditions, not just in a laboratory. The **half-cut design** combined with **multiple SMBB busbars** is also noteworthy - this approach improves current flow within the module and increases resistance to losses when the installation is partially shaded. In practice, the HN21-40H helps investors address common issues: maximizing energy output from a given roof area, maintaining stable performance under variable sunlight, and minimizing the risk of reduced returns over the long term. A key advantage is the **high-density lamination** with very small gaps between cells, which translates to better utilization of the module's active surface area. This is a good choice for homes, small businesses, and projects where aesthetics, predictable production, and reasonable overall installation costs are important. ## Notable figures - Efficiency of 21.1% matches the \*\*PERC 400-450W\*\* median - 210.7 W/m² power density - 4.5 W/m² more than \*\*PERC 400-450W\*\* median (206.2 W/m²), more power per roof area - Temperature coefficient of -0.34%/°C matches the \*\*PERC 400-450W\*\* median - At 21.0 kg, weight matches the \*\*PERC 400-450W\*\* median - #9614 for efficiency, #8778 for temperature performance out of 14005 panels ## Questions ### Is the Hanersun Hitouch 6 (HN21-40H) series still available for purchase? The Hanersun Hitouch 6 (HN21-40H) series has been discontinued and is no longer part of the standard distributor lineup. Remaining stock units may still be found at some retailers. If you need a current alternative, ask your supplier about newer Hanersun PERC modules or a comparable series from another manufacturer that meets the same performance requirements. ### What warranty does the Hanersun Hitouch 6 HN21-40H carry? Hanersun provided a 12-year product warranty and a 25-year linear power output warranty for the HN21-40H modules. The 25-year power guarantee ensures predictable energy yield over the full operational lifetime of the system. Since the series is discontinued, buyers should confirm warranty claim procedures directly with their distributor before purchasing remaining stock. ### What is half-cut cell and SMBB technology in the Hitouch 6, and why does it matter? Half-cut cells are laser-split into two halves, reducing internal resistance and resistive losses. SMBB (Super Multi Busbar) replaces a few wide busbars with many thin ones, shortening the current path across each cell. Together, these technologies in the HN21-40H improve module efficiency under partial shading, lower operating temperatures, and reduce the risk of micro-cracks during shipping and installation. ### How much power do Hanersun Hitouch 6 panels produce, and is that enough for a typical home? The HN21-40H modules are rated at 405 Wp peak power under STC conditions. A typical single-family home consuming around 4,000–5,000 kWh per year generally needs 8–12 modules, resulting in a 3.2–4.9 kWp system. The exact number depends on roof orientation, local irradiance, and the household's actual energy consumption profile. ### Do Hitouch 6 HN21-40H panels handle partial shading well, for example from a chimney? Yes. The half-cut design electrically splits each module into two independent halves. If a chimney or antenna shades the upper portion, only that half is affected — the lower half continues producing at full capacity. Combined with the SMBB layout, which reduces the per-cell shadow impact across the string, the HN21-40H performs well on rooftops with typical obstructions. ### Are Hanersun Hitouch 6 modules bifacial — do they generate power from both sides? No, the HN21-40H is a monofacial module. Energy is harvested exclusively from the front active surface. Bifacial technology, which captures additional energy from light reflected off the ground or rooftop surface, is available in other, more recent module series. For standard pitched-roof installations, the absence of bifacial capability is not a limitation, since reflected irradiance rarely reaches the rear of a roof-mounted panel. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/HN21-40H-385-405-EN-ab3559b3bb4c.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-455-MAH54Db](https://comparepv.com/panel/aiko-aiko-455-mah54db) | 455 W | +50 W, cooler, +2.2 pp | | [Longi Solar LR5-54HTH-455M](https://comparepv.com/panel/longi-lr5-54hth-455m) | 455 W | +50 W, cooler, +2.2 pp | | [Yingli YL455CF54 e/2](https://comparepv.com/panel/yingli-yl455cf54-e-2) | 455 W | +50 W, cooler, +2.2 pp | | [Einnova Solarline ESM-455T](https://comparepv.com/panel/einnova-solarline-esm-455t) | 455 W | +50 W, +2.2 pp, +5 yr warranty | | [SunEvo Solar SE5-54HBC-455W](https://comparepv.com/panel/sunevo-solar-se5-54hbc-455w) | 455 W | +50 W, cooler, +2.2 pp | | [Just Solar JST-EDMH-(445-465)W-TD (455W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-455w-class) | 455 W | +50 W, +2.2 pp, +5 yr warranty | | [Luxor Solar LX-455M/182R-96+ GG](https://comparepv.com/panel/luxor-lx-455m-182r-96-gg) | 455 W | +50 W, cooler, +2.2 pp | | [Hanersun HN21-40H385W](https://comparepv.com/panel/hanersun-hn21-40h385w) | 385 W | -20 W, -1.1 pp | | [Hanersun HN21-40H390W](https://comparepv.com/panel/hanersun-hn21-40h390w) | 390 W | -15 W, -0.8 pp | | [Hanersun HN21-40H395W](https://comparepv.com/panel/hanersun-hn21-40h395w) | 395 W | -10 W, -0.6 pp | | [Hanersun HN21-40H400W](https://comparepv.com/panel/hanersun-hn21-40h400w) | 400 W | -0.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +105 W, cooler, +3.9 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +90 W, cooler, +3.7 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +100 W, cooler, +3.6 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +85 W, cooler, +3.4 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +95 W, cooler, +3.4 pp | --- Source: https://comparepv.com/panel/hanersun-hn21-40h405w Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.