--- title: "Solar N Plus SP-M10/144HG-555 555W Solar Panel - Specs & Review | ComparePV" description: "Solar N Plus SP-M10/144HG-555 555W solar panel. Specs: 21.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/solar-n-plus-sp-m10-144hg-555" updated: 2026-09-11 --- # Solar N Plus SP-M10/144HG-555 Efficiency leader, no clear weak spot 589 panels in the segment PERC 550-600 W ## Identity - **Manufacturer:** Solar N Plus - **Model:** SP-M10/144HG-555 - **Series:** CYGNUS - **Rated power:** 555 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 550-600 W (589 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 555 W | 560 W | Typical | | | Module efficiency | 21.50% | 21.29% | Strong - top 18% | 7,958 | | Power density | 214.8 | 212.9 | Strong - top 20% | 8,034 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,419 | | Weight (kg) | 32.0 kg | 30.8 kg | Typical | | | Performance warranty | 30 yrs | 27 yrs | Strong - top 25% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.50% | 21.29% | Strong - top 18% | 7,958 | | Power density | 214.8 | 212.9 | Strong - top 20% | 8,034 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,419 | | Weight per kWp | 57.7 | 52.7 | Typical | 11,340 | | Performance warranty | 30 yrs | 27 yrs | Strong - top 25% | 21 | ### Strengths - **21.50% module efficiency** - Top 18% of the PERC 550-600 W segment, against a median of 21.29%. - **214.8 watts per square metre** - Top 20% of the PERC 550-600 W segment, against a median of 212.9. - **30 year performance warranty** - Top 25% of the PERC 550-600 W segment, against a median of 27 yrs. - **Best for:** Residential, commercial, utility-scale and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 555 W - **Efficiency:** 21.50 % - **Voltage at Pmax (Vmp):** 41.70 V - **Current at Pmax (Imp):** 13.31 A - **Open-circuit voltage (Voc):** 50.30 V - **Short-circuit current (Isc):** 14.07 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.350 %/degC - **Temperature coefficient of Voc:** -0.280 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 144 - **Bifacial:** yes ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.0 kg - **Area:** 2.58 m2 - **Power density:** 214.8 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 85.0 % - **Output after 30 years:** 471 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7958 of 14005 | | Power density | 8034 of 14005 | | Temperature coefficient | 10419 of 14005 | | Weight | 11340 of 14005 | | Warranty | 21 of 14005 | ## About this series The Solar N Plus CYGNUS series are modules designed for maximum energy yield, where every square meter of roof and every kilowatt-hour counts. The use of **half-cut cells** and **multi-bin MBB architecture** improves performance under partial shading and reduces losses due to microcracks, which translates in practice to more stable energy production in Polish conditions. CYGNUS also stands out for its **high efficiency in low-light conditions** - even with cloudy weather and in winter, the system can generate more energy than many competing modules of the same class. This means shorter payback periods and better predictability for investors. It is a good choice for residential and commercial installations, as well as for larger projects where consistent quality and resistance to operating conditions are important. Thanks to its **enhanced PID resistance**, CYGNUS helps to minimize the risk of performance degradation over the long term, especially in higher-voltage installations. ## Notable figures - At 21.5% efficiency, this panel is on par with typical \*\*PERC 550-600W\*\* modules - Power density of 214.8 W/m² matches the \*\*PERC 550-600W\*\* median - At -0.35%/°C, hot weather performance is typical for \*\*PERC 550-600W\*\* panels - At 32.0 kg (1.2 kg above \*\*PERC 550-600W\*\* median of 30.8 kg), requires checking roof load capacity - Bifaciality factor of 70% can add 4-10% extra yield with reflective mounting surface ## Questions ### Is the Solar N Plus CYGNUS series still available for purchase? The CYGNUS series has been discontinued and is no longer offered as a new product. If you're planning a new solar installation, ask your distributor about current replacements from Solar N Plus or other manufacturers with similar specifications. Some sales channels may still have remaining stock, but availability cannot be guaranteed. ### What warranty does the Solar N Plus CYGNUS panel come with? The manufacturer provides a 15-year product warranty covering manufacturing defects and a 30-year linear power output warranty. This means the module is expected to maintain a specified minimum output level for three decades — a solid foundation for long-term return-on-investment planning for both residential and commercial installations. ### What is half-cut cell technology with MBB architecture, and what does it mean in practice for the CYGNUS series? In CYGNUS panels, each PERC cell is cut in half, reducing operating current and resistive losses. The Multi Busbar (MBB) architecture distributes current flow across more conductive paths, so micro-cracks in individual cells have less impact on the overall module output. The practical result is more stable performance under partial shading — for example, from chimneys, dormers, or nearby trees. ### Do Solar N Plus CYGNUS panels perform well on cloudy days and during winter in Poland? Yes, the CYGNUS series is rated for high efficiency under low-irradiance conditions, which is especially important in Poland's climate with frequent overcast periods. The PERC technology combined with half-cut cells captures more energy from diffuse light on cloudy days and short winter days compared to older standard modules without these improvements. ### What is the maximum power output of the CYGNUS module and which installations is it best suited for? Solar N Plus CYGNUS modules reach a peak power output of up to 560 Wp. This makes them suitable for residential rooftop installations — where every square meter of roof space matters — as well as commercial projects that require consistent, repeatable quality at scale. The high per-panel wattage means fewer modules are needed to reach your target system capacity. ### Are CYGNUS modules resistant to PID degradation, and does it matter over the long term? Yes, the CYGNUS series features enhanced resistance to Potential Induced Degradation (PID), a gradual efficiency loss caused by high system voltage combined with moisture ingress. In higher-voltage systems — typical for commercial installations or long string configurations — PID resistance directly preserves module power output throughout the full 30-year operational lifetime. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/sp-m10-144hg540-560w-2024v2-0-c3548947a92d.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +3.5 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +3.3 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +3.2 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +3.1 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | Cooler, 16 kg lighter, +2.9 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | Cooler, lighter, +2.9 pp | | [Solar N Plus SP-M10/144HG-540](https://comparepv.com/panel/solar-n-plus-sp-m10-144hg-540) | 540 W | -15 W, -0.6 pp | | [Solar N Plus SP-M10/144HG-545](https://comparepv.com/panel/solar-n-plus-sp-m10-144hg-545) | 545 W | -10 W, -0.4 pp | | [Solar N Plus SP-M10/144HG-550](https://comparepv.com/panel/solar-n-plus-sp-m10-144hg-550) | 550 W | Very close match | | [Solar N Plus SP-M10/144HG-560](https://comparepv.com/panel/solar-n-plus-sp-m10-144hg-560) | 560 W | Very close match | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +95 W, cooler, +3.7 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +90 W, cooler, +3.5 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +85 W, cooler, +3.3 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +80 W, cooler, +3.1 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | +75 W, cooler, +2.9 pp | --- Source: https://comparepv.com/panel/solar-n-plus-sp-m10-144hg-555 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.