--- title: "Q-SUN Solar QN-405HT-1 405W Solar Panel - Specs & Review | ComparePV" description: "Q-SUN Solar QN-405HT-1 405W solar panel. Specs: 20.70% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/q-sun-solar-qn-405ht-1" updated: 2026-09-11 --- # Q-SUN Solar QN-405HT-1 Strong in heat, no clear weak spot 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** Q-SUN Solar - **Model:** QN-405HT-1 - **Series:** Crystal P8 Full Black Monocrystalline (P type 405–420W) - **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 | 20.70% | 20.60% | Typical | 10,764 | | Power density | 207.4 | 206.2 | Typical | 10,626 | | 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 | 20.70% | 20.60% | Typical | 10,764 | | Power density | 207.4 | 206.2 | Typical | 10,626 | | 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 - **-0.340 %/°C temperature coefficient** - Top 24% of the PERC 400-450 W segment, against a median of -0.350. - **Best for:** Residential and commercial. ## Specification ### Electrical - **Rated power (Pmax):** 405 W - **Efficiency:** 20.70 % - **Voltage at Pmax (Vmp):** 31.25 V - **Current at Pmax (Imp):** 12.96 A - **Open-circuit voltage (Voc):** 36.89 V - **Short-circuit current (Isc):** 13.67 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:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 108 ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 21.0 kg - **Area:** 1.95 m2 - **Power density:** 207.4 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 | 10764 of 14005 | | Power density | 10626 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 5230 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Full Black aesthetic without compromise** - Black frame and black cell backsheet provide a uniform, premium look for the installation - a key advantage for projects where the investor won't accept contrast from light-colored components on the roof, without the typical premium-segment price markup. - **Competitive 20.7-21.5% efficiency** - Module efficiency sits in the upper range of the PERC segment and matches direct competitors - GCL-M10/54H (21.5%) and RedSolar P series M10-PERC Ultralight (21.52%) - at a comparable maximum power of 420 Wp. - **Solid 12/25-year warranty** - 12 years of product warranty and 25 years of linear power warranty is an industry standard that supports predictable ROI, consistent with typical financing terms for PV installations in the residential and small commercial segment. - **Predictable P-type cell performance** - Monocrystalline P-type cells in a 108-cell layout provide good parameter consistency across the string, easing inverter selection and reducing mismatch risk in typical single-family home installations. - **Refined build for outdoor operation** - A sealed junction box and outdoor-rated components improve moisture resistance and durability under variable weather conditions, translating into lower failure risk over the operating lifecycle. ## Cons - **PERC technology, not N-type** - The series relies on older PERC technology, while competitors (e.g., Jinko Solar JS-PERC SERIES reaches 21.7% efficiency) and the market overall are shifting toward TOPCon/N-type with lower LID degradation and better high-temperature performance - Crystal P8 doesn't offer this advantage. - **Manufacturer not on Tier-1 BNEF list** - Q-SUN Solar (founded in 2014) does not appear on Bloomberg New Energy Finance's Tier-1 manufacturer list, which can complicate bank financing for larger commercial installations that require a bankable module supplier. - **Efficiency below segment leader** - Maximum efficiency of 21.5% is lower than Jinko Solar JS-PERC SERIES (21.7%) and RedSolar P series (21.52%) - at the same 420 Wp max power, the series lands mid-pack rather than at the top among comparable PERC modules. ## About this series The Q-SUN Solar Crystal P8 Full Black Monocrystalline (P type 405-420W) series is designed for installations where both aesthetics and stable performance under real roof conditions are important. These are **full black** modules with a black frame that aesthetically complete the building's structure and better integrate into modern designs, particularly where the investor does not accept the contrast of bright elements on the roof. The use of **monocrystalline P-type** cells ensures predictable performance and good parameter repeatability throughout the string, which makes it easier to select an inverter and reduces the risk of "bottleneck" issues when expanding the installation. The **108-cell** layout is ideal for typical residential and small commercial roofs. Crystal P8 also emphasizes **safe operation** thanks to a well-designed construction with a sealed junction box and components designed for outdoor use. This is a good choice for those who want to combine high aesthetics with practical reliability, without overpaying for technologies they don't need. ## Notable figures - At 20.7% efficiency, this panel is on par with typical \*\*PERC 400-450W\*\* modules - Power density of 207.4 W/m² matches the \*\*PERC 400-450W\*\* median - At -0.34%/°C, hot weather performance is typical for \*\*PERC 400-450W\*\* panels - At 21.0 kg, weight matches the \*\*PERC 400-450W\*\* median - #10764 for efficiency, #8778 for temperature performance out of 14005 panels ## Questions ### What warranty does the Q-SUN Solar Crystal P8 Full Black series carry and what does it cover? The Crystal P8 series comes with a 12-year product warranty covering manufacturing defects and material failures, plus a 25-year linear power warranty guaranteeing at least 80–84% of rated output at end of life. This is the standard commitment for premium PERC modules and allows system owners to model returns over a full two-decade horizon with confidence. ### Does the full black design of the Crystal P8 hurt panel efficiency — can the black frame and backsheet cause overheating? Black frames and a black backsheet absorb slightly more solar radiation than standard white components, which can raise the module's operating temperature by a few degrees Celsius. In real-world terms this causes a marginal output loss of roughly 1–2% annually. For most homeowners the aesthetic benefit of a seamless roofline far outweighs this negligible energy trade-off. ### Is the 108-cell layout of the Crystal P8 an advantage when designing a system on a typical residential roof? Yes. A 108-cell format produces a more compact module footprint that fits more easily on limited or irregular roof surfaces. Compared to 120- or 132-cell panels, fewer cells mean a lower open-circuit voltage (Voc), simplifying inverter string sizing and often eliminating the need for power optimizers in straightforward residential configurations. ### What does PERC technology in the Crystal P8 deliver over older mono cells — does it matter on overcast days? PERC (Passivated Emitter and Rear Cell) adds a passivation layer on the rear surface that reflects unused photons back into the active silicon, boosting conversion efficiency. The benefit shows up both at peak irradiance and under diffuse light conditions common in northern European climates during autumn and winter. Combined with a monocrystalline P-type wafer, Crystal P8 delivers consistent, predictable annual yield. ### Why is the Crystal P8 420W a monofacial module — is there a reason bifacial was skipped? Crystal P8 is a monofacial module. Bifacial panels harvest reflected light from the surface beneath them, but require high-albedo ground (white gravel, concrete, snow) and sufficient clearance from the roof deck to produce meaningful additional yield. On a typical dark-colored pitched roof the bifacial gain drops to near zero while the module cost remains higher. Crystal P8 is therefore the more practical and cost-efficient choice for standard rooftop installations. ### Is Q-SUN Solar a Tier 1 manufacturer and how does that affect the purchase decision for Crystal P8 panels? Q-SUN Solar does not currently appear on Tier 1 lists published by BloombergNEF, meaning it has not received a bankability rating assigned to the largest global manufacturers. This does not necessarily reflect module quality, but buyers should verify whether the distributor offers an insurance-backed warranty — a third-party policy that protects the 25-year power guarantee against the manufacturer's potential insolvency. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/p-type-qrystal-full-black-mono-crystalline-405-420w-q-sun-so-3d8d2663508e.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-455-MAH54Db](https://comparepv.com/panel/aiko-aiko-455-mah54db) | 455 W | +50 W, cooler, +2.6 pp | | [Longi Solar LR5-54HTH-455M](https://comparepv.com/panel/longi-lr5-54hth-455m) | 455 W | +50 W, cooler, +2.6 pp | | [Yingli YL455CF54 e/2](https://comparepv.com/panel/yingli-yl455cf54-e-2) | 455 W | +50 W, cooler, +2.6 pp | | [Einnova Solarline ESM-455T](https://comparepv.com/panel/einnova-solarline-esm-455t) | 455 W | +50 W, +2.6 pp, +5 yr warranty | | [SunEvo Solar SE5-54HBC-455W](https://comparepv.com/panel/sunevo-solar-se5-54hbc-455w) | 455 W | +50 W, cooler, +2.6 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, +2.6 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, +2.6 pp | | [Q-SUN Solar QNM182-HS395-54](https://comparepv.com/panel/qn-solar-pv-limited-qnm182-hs395-54) | 395 W | -10 W, cooler, -0.5 pp | | [Q-SUN Solar QNM182-HS400-54](https://comparepv.com/panel/qn-solar-pv-limited-qnm182-hs400-54) | 400 W | Cooler | | [Q-SUN Solar QNM182-HS410-54](https://comparepv.com/panel/qn-solar-pv-limited-qnm182-hs410-54) | 410 W | Cooler, +0.3 pp | | [Q-SUN Solar QNM182-HS415-54](https://comparepv.com/panel/qn-solar-pv-limited-qnm182-hs415-54) | 415 W | +10 W, cooler, +0.6 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +105 W, cooler, +4.3 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +90 W, cooler, +4.1 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +100 W, cooler, +4.0 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +85 W, cooler, +3.8 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +95 W, cooler, +3.8 pp | --- Source: https://comparepv.com/panel/q-sun-solar-qn-405ht-1 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.