--- title: "Solarwatt SOLARWATT Panel classic AM 2.0 black - 35 mm (400 Wp variant) 400W Solar Panel - Specs & Review | ComparePV" description: "Solarwatt SOLARWATT Panel classic AM 2.0 black - 35 mm (400 Wp variant) 400W solar panel. Specs: 20.70% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/solarwatt-solarwatt-panel-classic-am-2-0-black-35-mm-400-wp-variant" updated: 2026-09-11 --- # Solarwatt SOLARWATT Panel classic AM 2.0 black - 35 mm (400 Wp variant) Strong in heat, no clear weak spot 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** Solarwatt - **Model:** SOLARWATT Panel classic AM 2.0 black - 35 mm (400 Wp variant) - **Series:** SOLARWATT Panel classic AM 2.0 black - 35 mm - **Rated power:** 400 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) | 400 W | 410 W | Weak - bottom 9% | | | Module efficiency | 20.70% | 20.60% | Typical | 10,764 | | Power density | 206.5 | 206.2 | Typical | 10,990 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 10% | 8,545 | | Weight (kg) | 19.7 kg | 22.0 kg | Strong - top 11% | | | 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 | 206.5 | 206.2 | Typical | 10,990 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 10% | 8,545 | | Weight per kWp | 49.2 | 53.0 | Strong - top 11% | 2,821 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Strengths - **-0.330 %/°C temperature coefficient** - Top 10% of the PERC 400-450 W segment, against a median of -0.350. - **49.2 kg per kWp** - Top 11% of the PERC 400-450 W segment, against a median of 53.0. - **Best for:** Residential and commercial. ## Specification ### Electrical - **Rated power (Pmax):** 400 W - **Efficiency:** 20.70 % - **Voltage at Pmax (Vmp):** 30.70 V - **Current at Pmax (Imp):** 13.00 A - **Open-circuit voltage (Voc):** 37.10 V - **Short-circuit current (Isc):** 13.90 A - **Max system voltage:** 1000 V ### Temperature - **Temperature coefficient of Pmax:** -0.330 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 44 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 108 ### Physical - **Length:** 1708 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 19.7 kg - **Area:** 1.94 m2 - **Power density:** 206.5 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 84.8 % - **Output after 30 years:** 327 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10764 of 14005 | | Power density | 10990 of 14005 | | Temperature coefficient | 8545 of 14005 | | Weight | 2821 of 14005 | | Warranty | 9798 of 14005 | ## About this series The Solarwatt SOLARWATT Panel classic AM 2.0 black - 35 mm is a refined glass-foil type module, designed for stable energy production and aesthetic appeal. It is characterized by its **full black appearance** - a black frame and darkened elements that make it well-suited for modern roofs and facades, without the "gap" typical of many standard panels. The use of **PERC monocrystalline cells** supports high efficiency even in less ideal sunlight conditions, while the construction using tempered glass with an anti-reflective coating helps to minimize light reflection losses. In practice, it is a good choice for those who want to combine aesthetics with predictable energy yield. The series also solves the common problem of power loss in difficult conditions thanks to **PID protection** and long-term degradation tests. The module is suitable for roofs of single-family homes, small businesses, and projects where **durable and solid construction** and long-term reliability are important. ## Notable figures - At 20.7% efficiency, this panel is on par with typical \*\*PERC 400-450W\*\* modules - At 206.5 W/m² power density, roof space requirements are typical for \*\*PERC 400-450W\*\* panels - Temperature coefficient of -0.33%/°C matches the \*\*PERC 400-450W\*\* median - 19.7 kg weight - 2.3 kg lighter than \*\*PERC 400-450W\*\* median (22.0 kg), reducing installation effort - In the top 77% for efficiency among all PERC panels ## Questions ### Is the SOLARWATT Panel classic AM 2.0 black - 35 mm series still available for purchase? The SOLARWATT Panel classic AM 2.0 black - 35 mm series has been discontinued and is no longer available through official distribution channels. Remaining stock may still be found with select distributors or on the secondary market. If you need similar aesthetics and performance specs, ask your installer about current Solarwatt alternatives. ### What warranty does the SOLARWATT Panel classic AM 2.0 black come with? Solarwatt provides a 15-year product warranty and a 25-year power output warranty on the classic AM 2.0 black series. The power warranty guarantees the module retains a specified percentage of its rated 405 Wp output over 25 years. This is a strong warranty level for a glass-foil module manufactured by a German company. ### Do the PERC cells in the SOLARWATT Panel classic AM 2.0 black improve output in overcast conditions? Yes. The monocrystalline PERC cells in this series deliver better efficiency under diffuse light compared to standard mono cells, translating to slightly higher output on cloudy days and at low sun angles. This matters in climates with frequent overcast skies. The low Pmax temperature coefficient (-0.33%/K) also stabilizes energy production on hot summer days. ### What does PID resistance mean in the SOLARWATT Panel classic AM 2.0 black and why does it matter? PID (Potential Induced Degradation) is the gradual power loss that occurs when high system voltage combines with moisture to cause leakage currents through the cell. The classic AM 2.0 black carries a certified PID resistance rating per 2 PfG 2387, confirming it has been tested against this failure mode. This is especially important in high-voltage string systems, protecting against unexpected output degradation after several years of operation. ### Are the SOLARWATT Panel classic AM 2.0 black - 35 mm modules compatible with standard pitched-roof mounting systems? Yes. The modules measure 1,708 x 1,134 mm with a 35 mm frame profile and weigh approximately 19.5 kg, fitting within the specs of common pitched-roof racking systems such as Schletter, K2 Systems, and Esdec. MC4 connectors and 3 bypass diodes are compatible with mainstream inverters. Confirm with your installer that the chosen racking solution supports a 35 mm frame height. ### Does the full-black design of the SOLARWATT classic AM 2.0 black negatively affect module operating temperature? The black frame and black backsheet absorb slightly more heat than lighter alternatives, which can marginally reduce efficiency on very hot days. Solarwatt designed the module for exactly this operating environment, with a rated maximum temperature of +85°C. In practice, the annual energy yield difference is negligible, and for most homeowners the aesthetic advantage of a full-black panel fully offsets this minor thermal effect. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Datasheet-SOLARWATT-Panel-classic-AM-20-black-35-mm-en-9cae46ca701f.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Luxor Solar LX-440M/182-108+GG](https://comparepv.com/panel/luxor-solar-lx-440m-182-108-gg) | 440 W | Cooler, +2.4 pp, +5 yr warranty | | [Just Solar JST-EDMH-(445-465)W-TD (450W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-450w-class) | 450 W | +50 W, +2.4 pp, +5 yr warranty | | [Q-SUN Solar QNN182-HG450-54](https://comparepv.com/panel/qn-solar-pv-limited-qnn182-hg450-54) | 450 W | +50 W, +2.3 pp, +5 yr warranty | | [Huayao HY440-N108BDD](https://comparepv.com/panel/huayao-hy440-n108bdd) | 450 W | +50 W, +2.3 pp, +5 yr warranty | | [BYD NLBK-27-450](https://comparepv.com/panel/byd-nlbk-27-450) | 450 W | +50 W, +2.3 pp, +5 yr warranty | | [Renesola RS41-450NBG-E3](https://comparepv.com/panel/renesola-rs41-450nbg-e3) | 450 W | +50 W, +2.3 pp, +5 yr warranty | | [Solarwatt SOLARWATT Panel classic AM 2.0 black - 35 mm (395 Wp variant)](https://comparepv.com/panel/solarwatt-solarwatt-panel-classic-am-2-0-black-35-mm-395-wp-variant) | 395 W | -0.3 pp | | [Solarwatt SOLARWATT Panel classic AM 2.0 pure - 35 mm (405 Wp variant)](https://comparepv.com/panel/solarwatt-solarwatt-panel-classic-am-2-0-pure-35-mm-405-wp-variant) | 405 W | Very close match | | [Solarwatt SOLARWATT Panel classic AM 2.0 pure - 35 mm (410 Wp variant)](https://comparepv.com/panel/solarwatt-solarwatt-panel-classic-am-2-0-pure-35-mm-410-wp-variant) | 410 W | +10 W, +0.5 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +110 W, cooler, +4.3 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +95 W, cooler, +4.1 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +105 W, cooler, +4.0 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +90 W, cooler, +3.8 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +100 W, cooler, +3.8 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +100 W, cooler, +3.8 pp | --- Source: https://comparepv.com/panel/solarwatt-solarwatt-panel-classic-am-2-0-black-35-mm-400-wp-variant Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.