--- title: "Solarwatt SOLARWATT Panel vision AM 4.0 black (405 Wp variant) 405W Solar Panel - Specs & Review | ComparePV" description: "Solarwatt SOLARWATT Panel vision AM 4.0 black (405 Wp variant) 405W solar panel. Specs: 20.80% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/solarwatt-solarwatt-panel-vision-am-4-0-black-405-wp-variant" updated: 2026-09-11 --- # Solarwatt SOLARWATT Panel vision AM 4.0 black (405 Wp variant) 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 variant) - **Series:** SOLARWATT 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 and shaded-installations. - **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 ### 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 The SOLARWATT Panel vision AM 4.0 black series is designed for those who expect both high durability, stable performance, and a consistent aesthetic. The module utilizes a **glass-glass** construction, which protects the solar cells better from moisture, microcracks, and mechanical stress compared to typical panels with a film backing. The use of **PERC bifacial solar cells in a half-cut configuration** supports efficient operation in varying sunlight conditions and helps minimize losses due to partial shading. The black version features a refined design: **a black frame and darkened components** make the installation look modern, especially on dark roofs and metal roofs. The series also prioritizes investment security: **long product and performance warranties**, as well as optional insurance, reduce the risk of future costs. This is a good choice for single-family homes, roofs with high aesthetic requirements, and installations where weather resistance and system longevity are important. ## Notable figures - Efficiency of 20.8% matches the \*\*PERC 400-450W\*\* median - Power density of 207.4 W/m² matches the \*\*PERC 400-450W\*\* median - Temperature coefficient of -0.33%/°C matches the \*\*PERC 400-450W\*\* median - Weight of 25.4 kg is 3.4 kg above \*\*PERC 400-450W\*\* median (22.0 kg) - verify structural support - #10457 for efficiency, #8545 for temperature performance out of 14005 panels ## 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 part of the manufacturer's standard lineup. Some units may still be available as end-of-stock inventory at select distributors. Before ordering, confirm availability with your supplier and consider the current vision AM 4.5 series as an updated alternative with comparable specifications. ### What warranty does the SOLARWATT Panel vision AM 4.0 black come with? Solarwatt provides a 30-year product warranty and a 30-year power warranty, guaranteeing at least 87% of rated output after three decades of operation. The manufacturer also includes a 5-year FullCoverage insurance policy at no additional cost, covering potential yield losses if the modules underperform. This is among the longest combined warranties available in the residential PV market. ### Why does the SOLARWATT Panel vision AM 4.0 black use a glass-glass construction and what does it mean for long-term durability? Instead of a standard polymer backsheet, the vision AM 4.0 black uses tempered glass on both front and rear surfaces. This design significantly reduces moisture ingress, lowers the risk of micro-cracks caused by mechanical loads such as snow or wind pressure, and extends the module's service life. The glass-glass structure is the primary reason Solarwatt can back this panel with a 30-year product warranty. ### What are bifacial PERC half-cut cells and do they actually improve energy yield? PERC technology adds a passivation layer to the rear of each cell, reflecting photons back for a second absorption pass and boosting efficiency. The half-cut design splits each cell in two, reducing resistive losses and improving shading tolerance. Bifacial capability allows the module to generate additional power from diffuse light reflected off roofing surfaces. Together, these technologies support stable yields under variable irradiance conditions. ### Do the all-black SOLARWATT vision AM 4.0 black panels run hotter and does that reduce output? The black frame and tinted glass can slightly raise the module's operating temperature compared to silver-framed equivalents. The panel's temperature coefficient is approximately -0.33%/°C, which is typical for PERC modules and fully acceptable under Central European climate conditions. For most rooftop installations on dark roof tiles, the aesthetic benefit clearly outweighs this marginal thermal penalty. ### How much does the SOLARWATT vision AM 4.0 black weigh and does it require roof reinforcement? The panel weighs approximately 25.4 kg, notably more than a comparable glass-foil module at 20-22 kg, as a direct result of the dual-glass construction. This additional load must be factored into the installation design. For most modern roofs it presents no structural issue, but for older buildings a load-bearing assessment by a structural engineer or certified installer is recommended before proceeding. ## 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-variant Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.