--- title: "Sonnex Energie SNX-D54HN***-M-S (440W) 440W Solar Panel - Specs & Review | ComparePV" description: "Sonnex Energie SNX-D54HN***-M-S (440W) 440W solar panel. Specs: 22.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/sonnex-energie-snx-d54hn-m-s-440w" updated: 2026-09-11 --- # Sonnex Energie SNX-D54HN\*\*\*-M-S (440W) Space saver, weak in heat 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Sonnex Energie - **Model:** SNX-D54HN\*\*\*-M-S (440W) - **Series:** 54 Series TOPCon Smart Module (Smart Series: SNX-D54HN(S)) - **Rated power:** 440 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 400-450 W (1218 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 440 W | 435 W | Typical | | | Module efficiency | 22.50% | 22.00% | Strong - top 9% | 4,222 | | Power density | 225.3 | 220.2 | Strong - top 8% | 4,099 | | Temperature coefficient | -0.310 | -0.290 | Weak - bottom 10% | 8,005 | | Weight (kg) | 21.0 kg | 22.0 kg | Strong - top 17% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.50% | 22.00% | Strong - top 9% | 4,222 | | Power density | 225.3 | 220.2 | Strong - top 8% | 4,099 | | Temperature coefficient | -0.310 | -0.290 | Weak - bottom 10% | 8,005 | | Weight per kWp | 47.7 | 51.4 | Strong - top 17% | 1,829 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **225.3 watts per square metre** - Top 8% of the TOPCon 400-450 W segment, against a median of 220.2. Ranked 4,099th in the whole database. - **22.50% module efficiency** - Top 9% of the TOPCon 400-450 W segment, against a median of 22.00%. Ranked 4,222nd in the whole database. - **47.7 kg per kWp** - Top 17% of the TOPCon 400-450 W segment, against a median of 51.4. ### Watch out for - **-0.310 %/°C temperature coefficient** - Bottom 10% of the TOPCon 400-450 W segment, against a median of -0.290. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 440 W - **Efficiency:** 22.50 % - **Voltage at Pmax (Vmp):** 32.20 V - **Current at Pmax (Imp):** 13.68 A - **Open-circuit voltage (Voc):** 38.50 V - **Short-circuit current (Isc):** 14.39 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.310 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 21.0 kg - **Area:** 1.95 m2 - **Power density:** 225.3 Wp/m2 ### Warranty and degradation - **Product warranty:** 20 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 385 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 4222 of 14005 | | Power density | 4099 of 14005 | | Temperature coefficient | 8005 of 14005 | | Weight | 1829 of 14005 | | Warranty | 21 of 14005 | ## About this series The Sonnex Energie 54 Series TOPCon Smart Module (Smart Series: SNX-D54HN(S)) combines N-type cells using the TOPCon technology with integrated smart electronics within the module, effectively improving performance in situations where traditional panels struggle. A key advantage is **optimization at the string level**, which **minimizes losses due to shading** (e.g., from chimneys, skylights, or trees) and stabilizes the system's operation throughout the day. The module also supports **cell-string monitoring**, which facilitates quick diagnostics of production declines without guesswork. From a safety perspective, **temperature detection and a rapid shutdown (RSD) function** are crucial, limiting the risk of hot spots and simplifying maintenance. Another advantage is compatibility with third-party inverters and the absence of the need for external optimizers - this reduces the number of connections and potential mounting errors. This is a good choice for roofs of houses, small businesses, and installations with varying orientations, where predictable performance and module control are essential. ## Notable figures - Efficiency of 22.5% matches the \*\*TOPCon 400-450W\*\* median - Power density of 225.3 W/m² packs 5.1 W/m² more into the same footprint vs \*\*TOPCon 400-450W\*\* median (220.2 W/m²) - At -0.31%/°C, loses 0.02pp more power per degree than \*\*TOPCon 400-450W\*\* median (-0.29%/°C) - At 21.0 kg, weight matches the \*\*TOPCon 400-450W\*\* median - Ranked #4222 out of 14005 panels for efficiency in the database ## Questions ### What warranty does the Sonnex Energie SNX-D54HN(S) Smart Series carry? Sonnex Energie provides a 20-year product warranty and a 30-year power output warranty for the SNX-D54HN(S) series. The 30-year linear power guarantee is among the longest available in the prosumer PV market and covers the full expected payback period of a typical residential system. The low long-term degradation rate is enabled by N-type TOPCon cells, which show significantly less LID than legacy PERC technology. ### Does the SNX-D54HN(S) handle partial shading better than a standard TOPCon module? Yes. The Smart Module integrates cell-string-level optimization with three independent MPPT circuits built into each panel. When shade from a chimney, dormer, or nearby trees falls on the module, losses are contained to the affected cell strings while the rest of the module continues operating at full power. A conventional TOPCon or PERC panel without an optimizer can drag down the output of an entire string inverter under the same conditions. ### Do SNX-D54HN(S) panels require a dedicated inverter or external MLPE optimizers? No. The Smart Series has its optimizer electronics integrated directly into the module, eliminating the need for external MLPE devices and reducing the number of rooftop connections. The panels are compatible with standard string inverters from third-party manufacturers via RS485, so installers retain full flexibility in inverter selection without being locked into a proprietary ecosystem. ### What is the rapid shutdown (RSD) function in the SNX-D54HN(S) and why does it matter? The integrated RSD circuit drops module-level DC voltage to a safe level within seconds of a system shutdown command. Because it is built into the SNX-D54HN(S) module itself, no additional external shutdown devices need to be installed. This protects firefighters and service crews working on an energized roof and aligns with rapid shutdown requirements similar to NEC 2017 that are increasingly referenced in European electrical codes. ### What is the peak power of the Sonnex Energie SNX-D54HN(S) and how many panels do I need for a 10 kWp system? The module is rated at 440 Wp. A 10 kWp system requires only 23 of these panels, compared to 25-27 conventional 370-380 Wp PERC modules for the same target capacity. Fewer panels translate to less roof space used, fewer BoS connections, and a simpler installation while achieving the same system output. ### Is the SNX-D54HN(S) suitable for installation on a pitched residential roof? Yes. At 1722 x 1134 x 30 mm and approximately 21 kg, the module fits standard racking systems designed for pitched residential roofs. The built-in cell-string MPPT optimization makes it especially well-suited for roofs with uneven exposure or shading obstacles — conditions common on single-family homes with chimneys, skylights, or nearby vegetation — where a plain module would suffer disproportionate yield losses. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/SNX-D54HN420-440MS-Smart-All-black-English-1-5a90d90a5b3b.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +50 W, cooler, +2.0 pp | | [Suntech STP-NT11/48QGSF-490](https://comparepv.com/panel/suntech-stp-nt11-48qgsf-490) | 490 W | +50 W, cooler, +2.0 pp | | [JA Solar JAT54S40-485/LR](https://comparepv.com/panel/ja-solar-jat54s40-485-lr) | 485 W | +45 W, cooler, +1.8 pp | | [AIKO AIKO-A485-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a485-mce54mw) | 485 W | +45 W, cooler, +1.8 pp | | [AIKO AIKO-A485-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a485-mah54mw) | 485 W | +45 W, cooler, +1.8 pp | | [Gokin GK-5-54HG-485M](https://comparepv.com/panel/gokin-gk-5-54hg-485m) | 485 W | +45 W, cooler, +1.8 pp | | [Heckert Solar ZEUS 3.0+ 108 485WP](https://comparepv.com/panel/heckert-solar-zeus-3-0-108-485wp) | 485 W | +45 W, cooler, +1.8 pp | | [Sonnex Energie SNX-D54HND-415M](https://comparepv.com/panel/sonnex-energie-snx-d54hnd-415m) | 415 W | -25 W, heavier, -1.2 pp | | [Sonnex Energie SNX-D54HND-420M](https://comparepv.com/panel/sonnex-energie-snx-d54hnd-420m) | 420 W | -20 W, heavier, -1.0 pp | | [Sonnex Energie SNX-D54HN\*\*\*-M-S (425W)](https://comparepv.com/panel/sonnex-energie-snx-d54hn-m-s-425w) | 425 W | -15 W, -0.7 pp | | [Sonnex Energie SNX-D54HN\*\*\*-M-S (430W)](https://comparepv.com/panel/sonnex-energie-snx-d54hn-m-s-430w) | 430 W | -10 W, -0.5 pp | | [Sonnex Energie SNX-D54HN\*\*\*-M-S (435W)](https://comparepv.com/panel/sonnex-energie-snx-d54hn-m-s-435w) | 435 W | Very close match | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +70 W, cooler, +2.5 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +55 W, cooler, +2.3 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +65 W, cooler, +2.2 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +60 W, cooler, +2.0 pp | --- Source: https://comparepv.com/panel/sonnex-energie-snx-d54hn-m-s-440w Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.