--- title: "Solarwatt SOLARWATT Panel vision AM 4.0 black 405 Wp 405W Solar Panel - Specs & Review | ComparePV" description: "Solarwatt SOLARWATT Panel vision AM 4.0 black 405 Wp 405W solar panel. Specs: 20.80% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/solarwatt-solarwatt-panel-vision-am-4-0-black-405-wp" updated: 2026-09-11 --- # Solarwatt SOLARWATT Panel vision AM 4.0 black 405 Wp Strong in heat, heavy for its output 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** Solarwatt - **Model:** SOLARWATT Panel vision AM 4.0 black 405 Wp - **Series:** Panel vision AM 4.0 black - **Rated power:** 405 W - **Cell technology:** PERC - **Bifacial:** yes ## 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 | 20.80% | 20.60% | Typical | 10,457 | | Power density | 207.4 | 206.2 | Typical | 10,626 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 10% | 8,545 | | Weight (kg) | 25.4 kg | 22.0 kg | Weak - bottom 5% | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 17% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.80% | 20.60% | Typical | 10,457 | | Power density | 207.4 | 206.2 | Typical | 10,626 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 10% | 8,545 | | Weight per kWp | 62.7 | 53.0 | Weak - bottom 5% | 12,814 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 17% | 21 | ### Strengths - **-0.330 %/°C temperature coefficient** - Top 10% of the PERC 400-450 W segment, against a median of -0.350. - **30 year performance warranty** - Top 17% of the PERC 400-450 W segment, against a median of 25 yrs. ### Watch out for - **62.7 kg per kWp** - Bottom 5% of the PERC 400-450 W segment, against a median of 53.0. Ranked 12,814th in the whole database. - **Best for:** Residential, commercial and BIPV. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 405 W - **Efficiency:** 20.80 % - **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:** 1500 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 - **Bifacial:** yes - **Bifacial gain:** 20.00 ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 25.4 kg - **Area:** 1.95 m2 - **Power density:** 207.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.0 % - **Output after 30 years:** 352 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10457 of 14005 | | Power density | 10626 of 14005 | | Temperature coefficient | 8545 of 14005 | | Weight | 12814 of 14005 | | Warranty | 21 of 14005 | ## About this series Solarwatt Panel vision AM 4.0 black is an advanced **glass-glass** solution that sets new standards in the durability and aesthetics of modern photovoltaic systems. The use of double tempered glass instead of a traditional backsheet makes the modules almost completely resistant to external factors, chemical degradation, and extreme mechanical stress. The **bifacial cell technology** used in this series enables the generation of additional energy also from reflected radiation, which significantly increases the real yield of the entire installation in various weather conditions. Thanks to the elegant all-black finish, these panels are an optimal choice for demanding investors for whom roof design is just as important as high efficiency. This solution effectively addresses the problem of component aging, offering users **record-breaking operational durability**, confirmed by one of the longest product warranties on the market. Compared to the competition, the AM 4.0 black series stands out with its uncompromising approach to fire safety and exceptional resistance to harsh environmental conditions. This is an offer for those who prioritize **maximum capital protection** and trouble-free operation for decades, combining precise technical engineering with attention to building architecture. By choosing these modules, you gain the certainty of stable power production while maintaining the highest quality standards. ## Notable figures - At 20.8% 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 -0.33%/°C, hot weather performance is typical for \*\*PERC 400-450W\*\* panels - At 25.4 kg, this panel is 3.4 kg heavier than the \*\*PERC 400-450W\*\* median (22.0 kg) - more demanding for installation crews - Ranked #10457 out of 14005 panels for efficiency in the database ## Questions ### Is the Solarwatt Panel vision AM 4.0 black series still available for purchase? The Solarwatt Panel vision AM 4.0 black series has been discontinued and is no longer available as new stock through authorized distributors. Its successor is the AM 4.5 series, offering higher output up to 425 Wp while retaining the same glass-glass construction. If you specifically need this model, check whether any distributors still hold remaining inventory or consider the secondary market. ### What warranty does the Solarwatt vision AM 4.0 black carry and what does it cover? Solarwatt backed this panel with a 30-year product warranty and a 30-year power output warranty, placing it among the longest warranty commitments in the residential PV market. The product warranty covers material and manufacturing defects, while the power warranty guarantees that output stays above a defined percentage of the rated 405 Wp over three decades. Full terms are available in the manufacturer's documentation. ### What does bifacial technology mean in the AM 4.0 black and is it worth the premium? Bifacial PERC cells in the AM 4.0 black generate power from both direct irradiance on the front side and reflected irradiance on the rear side. On light-colored roofing or elevated ground-mount installations, the bifacial gain can add several percentage points of additional yield compared to a standard monofacial module. Actual benefit depends on albedo, tilt angle, and row spacing, so a site-specific simulation is recommended before purchase. ### How does the glass-glass construction of the AM 4.0 black differ from standard backsheet modules? Conventional panels use a polymer backsheet that is susceptible to UV degradation, cracking, and moisture ingress over time. The AM 4.0 black replaces this with a second layer of 2 mm tempered glass, significantly improving resistance to mechanical stress, hail, chemical degradation, and potential-induced degradation (PID). This durability advantage is the primary reason Solarwatt was able to offer a 30-year product warranty on the series. ### How do Solarwatt vision AM 4.0 black panels perform in winter and at low temperatures? The panel has a temperature coefficient of Pmax of -0.33%/°C, meaning output actually rises above the nominal 405 Wp when ambient temperatures drop below the 25°C STC reference. On cold, clear winter days typical of Central Europe, the modules can outperform their rated power. The glass-glass structure also reduces thermally induced microcracks, maintaining PERC cell integrity through repeated freeze-thaw cycles. ### How heavy is the Solarwatt AM 4.0 black and can it be installed on a standard roof structure? The module measures 1722 × 1134 × 35 mm and weighs approximately 25.4 kg, slightly heavier than comparable backsheet panels due to the dual glass design. Most standard pitched-roof timber structures can accommodate this load without reinforcement, but a qualified installer should verify roof capacity and ensure the racking system is rated for the weight. The panel dimensions are compatible with common rail-based mounting systems. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/192891933267c5b8c47dd23-ae813bd6c9e3.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-455-MAH54Db](https://comparepv.com/panel/aiko-aiko-455-mah54db) | 455 W | +50 W, cooler, +2.5 pp | | [Longi Solar LR5-54HTH-455M](https://comparepv.com/panel/longi-lr5-54hth-455m) | 455 W | +50 W, +2.5 pp, -5 yr warranty | | [Yingli YL455CF54 e/2](https://comparepv.com/panel/yingli-yl455cf54-e-2) | 455 W | +50 W, lighter, +2.5 pp | | [Einnova Solarline ESM-455T](https://comparepv.com/panel/einnova-solarline-esm-455t) | 455 W | +50 W, lighter, +2.5 pp | | [SunEvo Solar SE5-54HBC-455W](https://comparepv.com/panel/sunevo-solar-se5-54hbc-455w) | 455 W | +50 W, +2.5 pp, -5 yr warranty | | [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, lighter, +2.5 pp | | [Luxor Solar LX-455M/182R-96+ GG](https://comparepv.com/panel/luxor-lx-455m-182r-96-gg) | 455 W | +50 W, cooler, +2.5 pp | | [Solarwatt SOLARWATT Panel vision AM 4.0 black (400 Wp variant)](https://comparepv.com/panel/solarwatt-solarwatt-panel-vision-am-4-0-black-400-wp-variant) | 400 W | -0.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +105 W, cooler, +4.2 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +90 W, cooler, +4.0 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +100 W, cooler, +3.9 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +85 W, cooler, +3.7 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +95 W, cooler, +3.7 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +95 W, cooler, +3.7 pp | --- Source: https://comparepv.com/panel/solarwatt-solarwatt-panel-vision-am-4-0-black-405-wp 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.