--- title: "Solarwatt SOLARWATT Panel classic AM 2.0 pure - 35 mm (405 Wp variant) 405W Solar Panel - Specs & Review | ComparePV" description: "Solarwatt SOLARWATT Panel classic AM 2.0 pure - 35 mm (405 Wp variant) 405W solar panel. Specs: 20.90% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/solarwatt-solarwatt-panel-classic-am-2-0-pure-35-mm-405-wp-variant" updated: 2026-09-11 --- # Solarwatt SOLARWATT Panel classic AM 2.0 pure - 35 mm (405 Wp variant) Light for its output, no clear weak spot 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** Solarwatt - **Model:** SOLARWATT Panel classic AM 2.0 pure - 35 mm (405 Wp variant) - **Series:** SOLARWATT Panel classic AM 2.0 pure - 35 mm - **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 | 20.90% | 20.60% | Typical | 10,072 | | Power density | 209.1 | 206.2 | Typical | 10,093 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 10% | 8,545 | | Weight (kg) | 19.7 kg | 22.0 kg | Strong - top 8% | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.90% | 20.60% | Typical | 10,072 | | Power density | 209.1 | 206.2 | Typical | 10,093 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 10% | 8,545 | | Weight per kWp | 48.6 | 53.0 | Strong - top 8% | 2,383 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Strengths - **48.6 kg per kWp** - Top 8% of the PERC 400-450 W segment, against a median of 53.0. Ranked 2,383rd in the whole database. - **-0.330 %/°C temperature coefficient** - Top 10% 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:** 20.90 % - **Voltage at Pmax (Vmp):** 30.90 V - **Current at Pmax (Imp):** 13.10 A - **Open-circuit voltage (Voc):** 37.20 V - **Short-circuit current (Isc):** 14.00 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:** 209.1 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:** 331 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10072 of 14005 | | Power density | 10093 of 14005 | | Temperature coefficient | 8545 of 14005 | | Weight | 2383 of 14005 | | Warranty | 9798 of 14005 | ## About this series The Solarwatt SOLARWATT Panel classic AM 2.0 pure - 35 mm is a refined module with a glass-foil construction, designed for stable operation in typical roof and ground-mounted installations. The use of monocrystalline cells in a half-cut configuration and multi-wire connections promotes higher resistance to microcracks and improved performance under partial shading, which translates to more reliable energy yield over the year. Compared to many competing solutions, it stands out due to its **full PID protection** and **LeTID testing**, which are important for maintaining performance over time. The hardened glass with an **anti-reflective coating** supports efficient light capture even with less ideal angles. The modules are also prepared for harsh environments - the declared **resistance to ammonia and salt fog** makes it easier to design installations near farms or coastal areas. This is a reasonable choice for investors who want quality and durability without paying a premium for "premium" features. ## Notable figures - At 20.9% efficiency, this panel is on par with typical \*\*PERC 400-450W\*\* modules - At 209.1 W/m² power density, roof space requirements are typical for \*\*PERC 400-450W\*\* panels - At -0.33%/°C, hot weather performance is typical for \*\*PERC 400-450W\*\* panels - 19.7 kg weight - 2.3 kg lighter than \*\*PERC 400-450W\*\* median (22.0 kg), reducing installation effort - #10072 for efficiency, #8545 for temperature performance out of 14005 panels ## Questions ### Is the SOLARWATT Panel classic AM 2.0 pure 35 mm series still available for purchase? The SOLARWATT Panel classic AM 2.0 pure 35 mm series has been discontinued and is no longer offered as a new product through regular distribution channels. Buyers may still find limited stock with some distributors, but availability is not guaranteed. We recommend contacting an authorized Solarwatt dealer or considering a currently manufactured Solarwatt model with comparable specifications. ### What warranty does the SOLARWATT Panel classic AM 2.0 pure 35 mm come with? Solarwatt provides a 15-year product warranty covering manufacturing defects and materials, as well as a 25-year linear power output warranty. The power warranty guarantees the panel maintains output above the declared minimum degradation threshold for a full quarter century. For a glass-film module, this is a strong commitment and reflects Solarwatt's focus on long-term reliability over the system's lifetime. ### What does half-cut PERC technology mean and how does it benefit the SOLARWATT classic AM 2.0 pure? PERC (Passivated Emitter and Rear Cell) adds a reflective rear passivation layer that recaptures unabsorbed light, boosting cell efficiency. Half-cut splitting reduces internal resistance and limits mismatch losses under partial shading. Combined with multiwire interconnection — which replaces thick busbars with multiple thin wires — the panel gains better resistance to microcracks and delivers a higher annual energy yield compared to conventional full-cell designs. ### Is the SOLARWATT Panel classic AM 2.0 pure 35 mm suitable for coastal or agricultural environments? Yes, the series is rated for demanding environments. Solarwatt certifies salt spray resistance, making it suitable for coastal installations where corrosive sea air can degrade cheaper modules. The ammonia resistance certification also makes it appropriate for sites near poultry or livestock farms, where ammonia vapors are a common cause of premature frame and junction box deterioration. ### What is the peak power of the SOLARWATT classic AM 2.0 pure 35 mm and is it suitable for a residential rooftop system? The panel's rated peak power is 410 Wp. A typical 6–8 kWp residential system would require approximately 15–20 modules. The half-cut PERC cells and full PID protection maintain solid output even under partial shading — a common issue on smaller rooftops with chimneys or dormers. The glass-film construction also results in lower weight compared to glass-glass modules, which simplifies rooftop installation. ### How does PID protection and LeTID testing in SOLARWATT classic AM 2.0 pure differ from budget alternatives? PID (Potential Induced Degradation) is power loss triggered by voltage differentials in the system — Solarwatt certifies full PID resistance, which is critical in high-voltage DC strings. LeTID (Light and Elevated Temperature Induced Degradation) is a more recently identified issue specific to PERC cells: output can decline temporarily under combined light and heat stress. Having LeTID testing on record means Solarwatt has validated the series against this effect, a step many budget manufacturers skip entirely. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Data-sheet-SOLARWATT-Panel-classic-AM-20-pure-35-mm-en-737f9e411820.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-455-MAH54Db](https://comparepv.com/panel/aiko-aiko-455-mah54db) | 455 W | +50 W, cooler, +2.4 pp | | [Longi Solar LR5-54HTH-455M](https://comparepv.com/panel/longi-lr5-54hth-455m) | 455 W | +50 W, cooler, +2.4 pp | | [Yingli YL455CF54 e/2](https://comparepv.com/panel/yingli-yl455cf54-e-2) | 455 W | +50 W, +2.4 pp, +5 yr warranty | | [Einnova Solarline ESM-455T](https://comparepv.com/panel/einnova-solarline-esm-455t) | 455 W | +50 W, +2.4 pp, +5 yr warranty | | [SunEvo Solar SE5-54HBC-455W](https://comparepv.com/panel/sunevo-solar-se5-54hbc-455w) | 455 W | +50 W, cooler, +2.4 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, +2.4 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, +2.4 pp | | [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 | -10 W, -0.5 pp | | [Solarwatt SOLARWATT Panel classic AM 2.0 pure - 35 mm (400 Wp variant)](https://comparepv.com/panel/solarwatt-solarwatt-panel-classic-am-2-0-pure-35-mm-400-wp-variant) | 400 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 | +0.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +105 W, cooler, +4.1 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +90 W, cooler, +3.9 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +100 W, cooler, +3.8 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +85 W, cooler, +3.6 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +95 W, cooler, +3.6 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +95 W, cooler, +3.6 pp | --- Source: https://comparepv.com/panel/solarwatt-solarwatt-panel-classic-am-2-0-pure-35-mm-405-wp-variant Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.